DOCSLIB.ORG

PCB Layout Help

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
PCB Layout Help PCB Layout Help © 2021 Nowarm Software PCB Layout Help © 2021 Nowarm Software All rights reserved. No parts of this work may be reproduced in any form or by any means - graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage and retrieval systems - without the written permission of the publisher. Products that are referred to in this document may be either trademarks and/or registered trademarks of the respective owners. The publisher and the author make no claim to these trademarks. While every precaution has been taken in the preparation of this document, the publisher and the author assume no responsibility for errors or omissions, or for damages resulting from the use of information contained in this document or from the use of programs and source code that may accompany it. In no event shall the publisher and the author be liable for any loss of profit or any other commercial damage caused or alleged to have been caused directly or indirectly by this document. Printed: May 2021 in (whereever you are located) Contents 3 Table of Contents Foreword 0 Part I Package Overview 10 1 Introd..u..c.i.n..g.. .D...i.p..T..r.a..c..e........................................................................................................... 10 2 Form.a..t.s............................................................................................................................... 12 3 DipTr.a..c..e.. .o..n.. .t.h..e.. .W...e..b........................................................................................................... 13 Part II PCB Layout 16 1 User i.n..t.e..r..f.a..c.e....................................................................................................................... 16 Main w indow . ......................................................................................................................................................... 16 Toolbars .......................................................................................................................................................... 17 Place Compon...e..n..t.. .p..a..n..e...l. ...................................................................................................................................... 21 Design Manag..e..r.. .................................................................................................................................................... 22 Status Bar .......................................................................................................................................................... 23 Main menu .......................................................................................................................................................... 23 File ......................................................................................................................................................... 23 Edit ......................................................................................................................................................... 24 View ......................................................................................................................................................... 25 Objects ......................................................................................................................................................... 27 Placement......................................................................................................................................................... 28 Route ......................................................................................................................................................... 28 High Speed......................................................................................................................................................... 29 Verification......................................................................................................................................................... 30 Library ......................................................................................................................................................... 30 Tools ......................................................................................................................................................... 31 Help ......................................................................................................................................................... 31 Object subme..n..u...s.. ................................................................................................................................................. 32 Componen.t........................................................................................................................................................ 32 Pad ......................................................................................................................................................... 33 Via ......................................................................................................................................................... 35 Mounting H..o..le..................................................................................................................................................... 36 Fiducial ......................................................................................................................................................... 36 Net ......................................................................................................................................................... 37 Differentia.l .p..a..i.r.................................................................................................................................................. 38 Shape ......................................................................................................................................................... 39 Text ......................................................................................................................................................... 40 Picture ......................................................................................................................................................... 41 Table ......................................................................................................................................................... 42 Copper po.u..r...................................................................................................................................................... 43 Dimensions......................................................................................................................................................... 43 Modes of ope..r.a..t..i.o..n.. .............................................................................................................................................. 44 Hotkeys .......................................................................................................................................................... 46 2 Work.i.n..g.. .w..i.t.h.. .f.i.l.e..s................................................................................................................ 47 Create a circu..i.t. .b..o...a..r.d... .......................................................................................................................................... 47 Open PCB .......................................................................................................................................................... 47 Save PCB .......................................................................................................................................................... 48 Update PCB fr.o...m... .s...c..h..e..m....a..t.i.c.. ............................................................................................................................... 48 3 4 PCB Layout Help Import .......................................................................................................................................................... 49 DipTrace A..S..C...II.................................................................................................................................................. 49 DXF ......................................................................................................................................................... 49 Gerber ......................................................................................................................................................... 50 N/C Drill (E.x..c..e..ll.o..n..)............................................................................................................................................. 52 Altium ASC..I.I...................................................................................................................................................... 53 Eagle PCB......................................................................................................................................................... 53 P-CAD AS.C..I.I..................................................................................................................................................... 53 P-CAD PDI.F.......................................................................................................................................................
Load more

Recommended publications
  • PLM Weekly Summary Editor: Cimdata News Team 15 January 2021 Contents Cimdata News
    PLM Weekly Summary Editor: CIMdata News Team 15 January 2021 Contents CIMdata News ............................................................................................................................................ 2 An Enterprise Digital Transformation Platform – a CIMdata Commentary......................................................2 Aras’ Cloud Strategy – a CIMdata Blog Post ....................................................................................................5 CIMdata Announces its 2021 PLM Market & Industry Forum Series ..............................................................6 CIMdata to Host a Free Webinar on CAD Trends ............................................................................................7 NLign Analytics “Structural Lifecycle Digital Environment” Enables Model-Driven Product Quality – a CIMdata Commentary .......................................................................................................................................8 PTC’s Cloud Strategy – a CIMdata Blog Post ................................................................................................. 13 Acquisitions .............................................................................................................................................. 14 Accenture Acquires Real Protect, Brazil-Based Information Security Company ........................................... 14 Atos to acquire In Fidem to reinforce its cybersecurity position in the North American market .................... 15 Planview
    [Show full text]
  • Eagle Tutorial
    EAGLE EASILY APPLICABLE GRAPHICAL LAYOUT EDITOR Tutorial Version 5 Schematic – Layout – Autorouter for Linux® Mac® Windows® CadSoft Computer www.cadsoftusa.com 6th Edition 005175100 Copyright © 2010 CadSoft Computer All Rights Reserved CadSoft Computer is a trading division of Newark Corporation. If you have any questions please feel free to contact us: USA and other countries: Phone: +1 (954) 237 0932 Fax: +1 (954) 237 0968 Internet: www.cadsoftusa.com Email: [email protected] Germany and other European countries: Phone: +49 (0)8635 6989-10 Hotline: +49 (0)8635 6989-30 Fax: +49 (0)8635 6989-40 Internet: www.cadsoft.de Email: [email protected] And remember that we offer a free hotline for our customers! Copyright 2010 CadSoft Computer. All rights reserved worldwide. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, scanning, digitizing, or otherwise, without the prior consense of CadSoft Computer. Printing this tutorial for your personal use is allowed. Windows is a registered trademark of Microsoft Corporation. Linux is a registered trademark of Linus Torvalds. Mac is a registered trademark of Apple Computer Inc. Table Of Contents 1 What to expect from this Tutorial...............................................................6 2 Features of EAGLE.......................................................................................7 System Requirements...............................................................................7
    [Show full text]
  • Pro/INTERFACE Help Topic Collection
    ® Pro/ENGINEER Wildfire™ 2.0 Pro/INTERFACE™ Help Topic Collection Parametric Technology Corporation Copyright © 2004 Parametric Technology Corporation. All Rights Reserved. User and training documentation from Parametric Technology Corporation (PTC) is subject to the copyright laws of the United States and other countries and is provided under a license agreement that restricts copying, disclosure, and use of such documentation. PTC hereby grants to the licensed user the right to make copies in printed form of this documentation if provided on software media, but only for internal/personal use and in accordance with the license agreement under which the applicable software is licensed. Any copy made shall include the PTC copyright notice and any other proprietary notice provided by PTC. This documentation may not be disclosed, transferred, modified, or reduced to any form, including electronic media, or transmitted or made publicly available by any means without the prior written consent of PTC and no authorization is granted to make copies for such purposes. Information described herein is furnished for general information only, is subject to change without notice, and should not be construed as a warranty or commitment by PTC. PTC assumes no responsibility or liability for any errors or inaccuracies that may appear in this document. The software described in this document is provided under written license agreement, contains valuable trade secrets and proprietary information, and is protected by the copyright laws of the United States and other countries. It may not be copied or distributed in any form or medium, disclosed to third parties, or used in any manner not provided for in the software licenses agreement except with written prior approval from PTC.
    [Show full text]
  • IDF Exporter IDF Exporter Ii
    IDF Exporter IDF Exporter ii April 27, 2021 IDF Exporter iii Contents 1 Introduction to the IDFv3 exporter 2 2 Specifying component models for use by the exporter 2 3 Creating a component outline file 4 4 Guidelines for creating outlines 6 4.1 Package naming ................................................ 6 4.2 Comments .................................................... 6 4.3 Geometry and Part Number entries ...................................... 7 4.4 Pin orientation and positioning ........................................ 7 4.5 Tips on dimensions ............................................... 8 5 IDF Component Outline Tools 8 5.1 idfcyl ....................................................... 9 5.2 idfrect ...................................................... 10 5.3 dxf2idf ...................................................... 11 6 idf2vrml 12 IDF Exporter 1 / 12 Reference manual Copyright This document is Copyright © 2014-2015 by it’s contributors as listed below. You may distribute it and/or modify it under the terms of either the GNU General Public License (http://www.gnu.org/licenses/gpl.html), version 3 or later, or the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), version 3.0 or later. All trademarks within this guide belong to their legitimate owners. Contributors Cirilo Bernardo Feedback Please direct any bug reports, suggestions or new versions to here: • About KiCad document: https://gitlab.com/kicad/services/kicad-doc/issues • About KiCad software: https://gitlab.com/kicad/code/kicad/issues • About KiCad software i18n: https://gitlab.com/kicad/code/kicad-i18n/issues Publication date and software version Published on January 26, 2014. IDF Exporter 2 / 12 1 Introduction to the IDFv3 exporter The IDF exporter exports an IDFv3 1 compliant board (.emn) and library (.emp) file for communicating mechanical dimensions to a mechanical CAD package.
    [Show full text]
  • CAD Data Exchange
    CCAADD DDaattaa EExxcchhaannggee 2255..335533 LLeeccttuurree SSeerriieess PPrrooff.. GGaarryy WWaanngg Department of Mechanical and Manufacturing Engineering The University of Manitoba 1 BBaacckkggrroouunndd Fundamental incompatibilities among entity representations Complexity of CAD/CAM systems CAD interoperability issues and problems cost automotive companies a combined $1 billion per year (Brunnermeier & Martin, 1999). 2 BBaacckkggrroouunndd (cont’d) Intra-company CAD interoperability Concurrent engineering and lean manufacturing philosophies focus on the reduction of manufacturing costs through the outsourcing of components (National Research Council, 2000). 3 IInnffoorrmmaattiioonn ttoo bbee EExxcchhaannggeedd Shape data: both geometric and topological information Non-shape data: graphics data Design data: mass property and finite element mesh data Manufacturing data: NC tool paths, tolerancing, process planning, tool design, and bill of materials (BOM). 4 IInntteerrooppeerraabbiilliittyy MMeetthhooddss Standardized CAD package Standardized Modeling Kernel Point-to-Point Translation: e.g. a Pro/ENGINEER model to a CATIA model. Neutral CAD Format: e.g. IGES (Shape-Based Format ) and STEP (Product Data-Based Format) Object-Linking Technology: Use Windows Object Linking and Embedding (OLE) technology to share model data 5 IInntteerrooppeerraabbiilliittyy MMeetthhooddss (Ibrahim Zeid, 1990) 6 CCAADD MMooddeelliinngg KKeerrnneellss Company/Application ACIS Parasolid Proprietary Autodesk/AutoCAD X CADKey Corp/CADKEY X Dassault Systems/CATIA v5 X IMS/TurboCAD X Parametric Technology Corp. / X Pro/ENGINEER SDRC / I-DEAS X SolidWorks Corp. / SolidWorks X Think3 / Thinkdesign X UGS / Unigraphics X Unigraphics / Solid Edge X Visionary Design System / IronCAD X X (Dr. David Kelly 2003) 7 CCAADD MMooddeelliinngg KKeerrnneellss (cond’t) Parent Subsidiary Modeling Product Company Kernel Parametric Granite v2 (B- Pro/ENGINEER Technology rep based) Corporation (PTC) (www.ptc.com) Dassault Proprietary CATIA v5 Systems SolidWorks Corp.
    [Show full text]
  • S. No. SPECIFICATION for Features to Be Provided by PCB Design Tool
    S. No. SPECIFICATION for features to be provided by PCB Design Tool Software 1 General Specification 1.1 Basic requirements The Electronics PCB Design Tool shall be a floating license with software for PCB design including schematic entry, component creation, component libraries, BOM generation, PCB placement and routing, ERC and DRC checks and exporting for manufacturing and documentation. 1.2 Import / export Should support for import and/or export of designs and library data created in similar reputed PCB CAD packages, viz. OrCAD®, Allegro®, PADS®, Cadstar®, Eagle®, P- CAD®, Protel®, Altium®, Mentor Graphics® DxDesigner®(Import), Mentor Graphics® Expedition(Import), Zuken® CADSTAR®(Import), P-CAD 1.3 Manufacturing File Outputs Should have facility to publish to PDF, print or web with a controlled view of a project's history and dependencies, generate Gerber, Gerber X2, NC Drill, ODB++ 3D video animations, and STEP files. 1.4 Assembly file outputs Should generate assembly drawings, pick and place file, test point report. 1.5 Batch processing Should support post processing using Batch Process 1.6 System The software shall work in 64bit Windows 7 , Requirements Windows 8 or Windows 10 version desktop / laptop. Linux support is desirable but not essential. The software should work on intranet from behind proxy server of the organization and internet connectivity should not be essential for its installation, use and upgrade. 2 Library 2.1 Library Management Should have unified library management based on a single data source for all component models and linked data including 3D models, data sheets and supplier links. 2.2 Library Should have library of major components from reputed manufacturers with provision to download files and work offline.
    [Show full text]
  • Procedures for the Nist Iges Validation Test Service
    Initial Graphics Exchange Specification (IGES): J Procedures for the NIST IGES ^ Validation Test Service Jacki A. Schneider Lynne S. Rosenthal U.S. DEPARTMENT OF COMMERCE Technology Administration National Institute of Standards and Technology Computer Systems Laboratory Graphics Software Group Gaithersburg, MD 20899 NIST i i Initial Graphics Exchange Specification (iGES): Procedures for the NiST iGES Validation Test Service Jacki A. Schneider Lynne S. Rosenthal U.S. DEPARTMENT OF COMMERCE Technology Administration National Institute of Standards and Technology Computer Systems Laboratory Graphics Software Group Gaithersburg, MD 20899 December 1994 U.S. DEPARTMENT OF COMMERCE Ronald H. Brown, Secretary TECHNOLOGY ADMINISTRATION Mary L. Good, Under Secretary for Technology NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY Arati Prabhakar, Director tf i I I I TABLE OF CONTENTS 1 Introduction 1 1.1 Purpose 1 1.2 The IGES standard 1 1.3 Scope of validation 2 1.4 Definitions 4 2 General procedures 7 2.1 Validation by testing 7 2.1.1 Overview 7 2.1.2 Validation Test Software 7 2.1.3 Renewal of a Certificate of Validation 8 2.1.4 Validation Summary Report (VSR) 8 2.2 Registration 8 2.2.1 Overview 8 2.2.2 Eligibility for registration 9 2.3 Miscellaneous 10 2.3.1 Pricing 10 2.3.2 Cancellation 10 2.3.3 Disputed and withdrawn tests 10 2.3.4 Validated Products List (VPL) 10 2.3.5 Documentation 11 2.3.6 Publication 11 3 Preprocessor testing program 13 3.1 Objective 13 3.2 Testing steps 13 3.3 Pricing 17 3.4 Registration of environments 18 4 Postprocessor testing program 19 4.1 Objective 19 4.2 Testing steps 19 4.3 Pricing 22 4.4 Registration of environments 22 APPENDIX A 25 iii IV ABSTRACT In 1989, the American Society of Mechanical Engineers (ASME) and the American National Standards Institute (ANSI) adopted the Initial Graphics Exchange Specification (IGES) Version 4.0 as a national standard (ASME/ANSI Y14.26M - 1989, Digital Representation for Communication of Product Definition Data).
    [Show full text]
  • Autoedms Avue File Formats For
    AutoEDMS aVUE Supported Formats – AutoEDMS v6.5r2sr3 3D / 2D CAD & Vector-Based Engineering Formats Releases / File Format File Type Extensions aVue/AVDE aVue Solid Versions Anvil viewer 1000 DRW Yes Yes 2007, 2006,2005, 2004, 2002, Drawing, 2000i, AutoCAD Drawing 2000, 14, DWG, DXF Yes Yes viewer Exchange 13c4, 13c3, 13c2, 13c1, 12, 10, 9, 2.x 2007, AutoCAD 2006,2005, 3D DWG 2D Yes viewer 2004, 2002, 2000 2004, 5.5, AutoCAD Drawing, 5, 4.x, 3.x, DWF Yes Yes viewer Web 2.x Drawing, AutoCAD Binary DXB Yes Yes viewer Exchange Slide, AutoCAD Slide SLD, SLB Yes Yes viewer Library AutoCAD Sheet Set DST Yes Yes viewer Files AutoCAD 2007, 2006, Mechanical 2D 2005, 2004 Viewer / DX, 2004, Autodesk Drawing 6(2002), DWG Yes Yes Mechanical 5(2000i), Desktop viewer 4(2000), 3, (2D) 2, 1.2 AutoCAD 2007, 2006, Mechanical 3D 2005, 2004 Viewer / Parts, DX, 2004, Autodesk DWG Yes Assembly 6(2002), Mechanical 5(2000i), Desktop viewer 4(2000) (3D) 11, 10, 9, 8, Autodesk Drawing 7, 6, 5.3, 5, IDW Yes Inventor viewer 4 11, 10, 9, 8, Autodesk Parts, IPT, IDV, 7, 6, 5.3, 5, Yes Inventor viewer Assembly IAM, IDE 4, 3, 2, 1 19, 99, 98, CADKEY Part File 97, 7, 6, 5, PRT Yes Yes viewer 4.x, 3.x CALCOMP PCI 906 / PCI, PLT Yes Yes viewer 907 Plot AVUE v19.1sp3 viewer 907 Plot Model, 4.2.4, 4.1.x, MODEL, CATIA 4 viewer Yes Export 4.0 EXP R17, R16, CGR, Part, R15,R14, CATPart, CATIA 5 viewer Product, R13, R12, Yes CATProduct, Drawing R11, R10, CATDrawing R9, R8, R7 Binary, CGM viewer 4, 3, 2, 1 CGM Yes Yes ASCII CGM - CALS compliant CGM Yes Yes viewer DirectModel 8,
    [Show full text]
  • Beyond Schematic Capture Meaningful Abstractions for Better Electronics Design Tools
    Beyond Schematic Capture Meaningful Abstractions for Better Electronics Design Tools Richard Lin, Rohit Ramesh, Antonio Iannopollo, Alberto Sangiovanni Vincentelli, Prabal Dutta, Elad Alon, Björn Hartmann University of California, Berkeley {richard.lin,rkr,antonio,alberto,prabal,elad,bjoern}@berkeley.edu Physical Device Parts Selection Ideas and ATmega Part Number Size Vf +3.3v Iteration Requirements System Architecture OVLFY3C7 5mm 2 V D0 APG1005SYC-T 0402 2.05 V Button J1 Design Micro- D1 5988140107F 0805 2 V D1 controller - or - ... SW1 Part Number Core LED Flow R1 U1 R2 ATmega32u4 AVR GND Micro- controller LPC1549 ARM CM3 Final FE310-G000 RV32IMAC Hand-built Schematic Prototype PCB Prototypes Capture PCB Tools paper, drawing software breadboards EDA suites: Altium, EAGLE, KiCAD parts libraries, catalogs, spreadsheets Used more abstract, high-level more concrete, low-level Design user stories implementation exploration documentation verification cost, manufacturability cost Concerns functional specification verification supporting circuitry system integration component availability and sourcing Figure 1: The electronics design flow, as described by our participants. Users start with an idea, refine that intoasystem architecture, and then iterate physical prototypes. Parts selection happens throughout the process. While certain steps require linear progression, iteration and revision of earlier stages also happen. Overall, EDA tools only support a small part of this process, and moving between steps was a major source of friction. ABSTRACT on clickthrough mockups of design flows through an exam- Printed Circuit Board (PCB) design tools are critical in help- ple project. We close with our observation on opportunities ing users build non-trivial electronics devices. While recent for improving board design tools and discuss generalizability work recognizes deficiencies with current tools and explores of our findings beyond the electronics domain.
    [Show full text]
  • Heartwood Smartscopesm Asset Collection Guidelines
    Heartwood SmartScopeSM Asset Collection Guidelines Congratulations! You are joining the ranks of some visionary organizations by deploying 3D Interactive Training – the true gold standard in learning. Our successful SmartScopeSM guidelines enable our customers to collect the data critical for the estimating and development process. Guidelines • Guideline 1 – Assets for Scope Estimation of Training Course. a. Video or images of equipment b. A description of the procedure in the lesson/course. If estimating multiple lessons/courses, send 3-4 packages of assets for the average lesson/course. Choose one or more of the following: 1. Current course materials used in classroom 2. Video of procedure performed on the equipment 3. Technical manual (indicate which pages are relevant) 4. Storyboard of course/lesson or procedure • Guideline 2 – Assets for Development of Training Course. Typically these are more detailed; we can provide best practices on how to assemble the assets. a. Required: i. Video and/or images of equipment ii. Current course materials used in classroom iii. Technical manual (indicate which pages are relevant) b. Desired: i. 3D models or 2D drawings of equipment, see page 2 for a list of compatible formats ii. Video of procedure performed on the equipment iii. Storyboard of course/lesson or procedure This is not an exhaustive list for all training courses. A very unique training course may require more data and some additional assets may be ‘required or desired’ to save time and cost. Ask us about our SmartStartSM service to make the asset collection process easier for you. H E A R T W O O D 2121 South El Camino Real, Suite 100 San Mateo, CA 94403-1859 PH: 888.781.0274 FAX: 877.536.4496 www.hwd3d.com Compatible file formats Preferred non-CAD format • Autodesk (*.fbx) • gw::OBJ-Importer (*.obj) Preferred CAD format • STEP (*.stp, *.step) • IGES (*.ige, *.iges, *.igs) Other compatible file formats • 3D Studio Mesh (*.3ds, *.prj) • Adobe Illustrator (*.ai) • Autodesk Packet File (*.apf) • ProEASM (*.asm) • Catia V5 (*.catpart, *.cgr, *.
    [Show full text]
  • Industrial Circuit Board Design and Microprocessor Programming Bachelor of Science Thesis in Mechatronics
    Industrial circuit board design and microprocessor programming Bachelor of Science thesis in Mechatronics FREDRIK HÖGBERG Department of Signals and Systems CHALMERS UNIVERSITY OF TECHNOLOGY Gothenburg, Sweden 2017 REPORT NO. XXXX XXXX Industrial circuit boar! design and %icroprocessor pro$ram%in$ FREDRIK HÖGBERG Depart%ent of Signal and S'ste%s CH)*MERS UNI,ERSIT- OF TE(HNO*OG- Gothenbur$, S/eden 2017 Industrial circuit board design and microprocessor pro$ra%%in$ FREDRIK HÖGBERG FREDRIK HÖGBERG, 2017 Technical report no xxxx544 Depart%ent of Signals and S'ste%s Chal%ers +ni6ersit' of Technolo$' SE-412 96 G;tebor$ S/eden Telephone + 46 (0)31-772 1000 (o6er5 Hot Screen 2000 is an industrial heat press machine that can be used to attach screen prints on clothin$. This thesis will go in to details on ho/ the circuit board and pro$ra% was ma!e for this %achine. Chal%ers Reproservice G;tebor$. S/eden 2017 CHALMERS Signals and Systems, Bachelor@s Thesis XXXX5XX I Abstract The %ain obAect of this proAect is to design and %aBe circuitr' to control a industrial heat press %achine. The circuitr' consist of a 0 la'er boar! containin$ a %icro controller. displa' %odule. )( DC module. te%perature controller and electronics to control electromechanical devices. The fra%e of reference /ill $o through the basics steps in designin$ and %anufacturin$ electrical circ"itry /ith digital and analo$ technolo$y and explain the basics of the most com%on electrical components use! in circuitr' toda'. The fra%e of reference /ill also sho/ ho/ to create sche%atic and circuit design "sin$ Ki()D and ho/ to pro$ra% a Microchi& %icroprocessor in the C pro$ra%ing lan$"a$e.
    [Show full text]
  • Calqrp Analog Power Meter Assembly Guide John Sutter W1JDS [email protected]
    CalQRP Analog Power Meter Assembly Guide John Sutter W1JDS [email protected] Rev 1.1 August 7, 2018 About 3 weeks ago Doug Hendricks, KI6DS, mentioned he had a club project idea. I think he said he had some low cost meters and thought it would be good to spin an old project, the Christmas Power Meter, using the latest/greatest tools of the day which I’m sure will be laughable in another decade. That earlier project by apparently had the same instigator. Like the original by Song Kang, WA3AYQ and Bob Okas, W3CD, this version of the meter has two ranges, 1W and 10W using a SPDT switch to select between them instead of 2 BNC connectors. Beyond that, the schematic is pretty much the same. The tools I used: Schematic Capture KiCAD PCB Layout KiCAD PCB Fabrication AllPCB Enclosure Design OpenSCAD 3D Printer Creality CR-10 1 The Circuit As mentioned earlier the schematic matches the Christmas Power Meter pretty closely. SW1 is used to switch the power from the BNC connector into either the 10W load consisting of four 200 Ω 3 Watt carbon film resistors or the 1W load consisting of two 100 Ω ½ Watt carbon film resistors. The diodes are used as detectors with the resulting voltage filtered by the capacitors. The resistors are used to adjust the full-scale current to 200 μA. More on that later. FIGURE 1 SCHEMATIC A germanium diode was used on the 1 W range due to its lower voltage drop. More on that later. If you decide to use a through hole switch, the maximum shaft diameter is 6.3 mm.
    [Show full text]