DOCSLIB.ORG

Radio-Electronics-19

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Radio-Electronics-19 Rad ioEIectroni for your workbench build DIGITAL CAPACITANCE METER has 4 -digit LED readout decipher secret messages COMPUTER CRYPTOGRAPHY use your microcomputer build scope add -on TII`nr CvNurilFSIZEÏi;,,s!l;it for 3D patterns galore easy to build CB SWITCHER for music between CB calls . .-.. construction tqchnigu` :- ICBRICKLAYINC for miniature projects .1%.1-401,1s if , r`v ! . - 93çM%e rStereo Hobby C ner 400 rN ldA M Zi 39V1H9S1)116M Jack Darr's Service Clin tiZ7Z9' at 95W00e S10 atrr v Hi-Fi Testleports www.americanradiohistory.com new design... new features...unique, time-tested principle! Weller controlled output soldering station Model WTCPN. New convenience -features. Striking contemporary appearance. Completely new design. Now more than ever in a class by itself. Only Weller's advanced engineering could have improved on its own predecessor WTCPL Station, popular standard of the electronics industry. new heat shield for cool operator comfort new plug -in iron design for zero down -time new integral tip- storage tray new larger sponge for easier tip cleaning improved, unitized rocker switch and neon indicator light new impact- resistant case And add to these new features Weller's unique, proven, closed -loop, low- voltage circuit, with its "interchangeable brains" in the tip ... a ferromagnetic sensor that controls the temperature at 600, 700, or 800° F., protecting sensitive workpieces. To change temperatures, simply change tips with knurled thumb- screw. More than 50 options in configuration, tip size, reach, and temperature! Exclusive -process triple -plating prevents tip oxidation and "freezing ". With all these new features and exclusive principles, Model WTCPN is still all function ... no frills! It's UL- listed and OSHA -compliant, of course. And now it's available at leading electronic distributors ... coast -to- coast. See it there. For technical information, write on your letterhead. , . ,, . ,,, . SOL (APO. Weller - Xcelite Electronics Division COOPER The Cooper Group INDUSTRIES P O BOX 728 APEX. NORTH CAROLINA 27502 CIRCLE 1 ON FREE INFORMATION CARD www.americanradiohistory.com ANNOUNCING NEW LOW PRICES AT RADIO SHACK, THE "PARTS PLACE" i Top quality devices, fully functional, carefully inspected. Guaranteed manufacturer's quality control procedures. These are not rejet I; Tot to meet all specifications, both electrically and mechanically. All are fallouts, not seconds. In fact, there are none better on the n E wet! made by well known American manufacturers, and all have to pass Count on Radio Shack for the finest quality parts. TTL Microcomputer Chip Digital 8080A Microprocessor. With a 16 -bit address bus capable of ICs addressing up to 65k bytes of memory and up to 256 I/O ports. "TRI- State" data bus gives it DMA and multiprocessing capa- First Quality Devices Made by bility. All National Semiconductor and Motorola buses TTL compatible. Up to 244 variable length instructions, with 6 general purpose registers plus an accumu- Cal Las, NOW lator. 40-pin DIP. 100% Prime. 276 -2510 17.95 Type No Yea, ONLY RS2102 Static RAM. 1024 -word by one bit random access read 7400 276-1801 S 49 35C /write 7402 276-1811 S 49 39C memory. Under 750 nS access. Single +5V power supply. 7404 2761802 S 59 35c 276 -2501 2 49 each or 8/14.95 7406 276-1821 S 69 490 1795 7410 276 1807 S 49 39c 7413 276-1815 SI 19 790 LEDs /Optoelectronics 7420 2761809 S 49 39C Digital Displays Cat. i_a -.1 NOW 7427 276 1823 S 69 49c Digits Size Drive No "ear ONLY 7432 276 1824 S 69 49C 744' 276-1804 51 59 990 X 4 0.5" Anod. 276 -1201 59 95 6.95 7447 2761805 S1 99 99C 01 LE 4 0.5" Cath 276 -1202 99 95 6.95 7448 276.1816 Si 99 99C 7451 276-1825 S 49 390 a 7472 276-1803 S 79 49c 7474 276-1818 S 79 49C Item Cat No. Reg. Now Only L:'I NOW 7475 276-1806 Si 19 790 Digits Size Drive Cat. No. 5 Solar Cell 276 -115 1.59 Ve.r ONLY 7476 276-1813 S 79 590 Silicon Solar Cell 276 -128 1.99 7485 276-1826 S 1 59 1.19 E 1 0.6" Anod. 276 -056 $3 39 2.99 E Photocell 276 -116 990 7486 2761827 S 69 49e EJ 1 0.6" Cath. 276 -066 $3.39 2.99 .5 FPT 100 19 276 -130 79C 7490 276-1808 S1 790 ô © 1 0.3" Anod. 276-053 $2.39 1.99 19 Lg Red LED 276-041 2/69c 2/490 7492 2761819 Si 69C © 1 0.3" Cath. 276-062 12 15 1.99 F Lg Clr LED 276 -047 2/69c 2/490 74123 2761817 Si 69 99C © 1 0.3" Anod. 276 -1210 4/66 17 .116.99 Med Red LED 276-026 2/69c 2/490 74145 2761828 Si 49 1.19 1 0.3" Cath. 276 -1211 4/04 17 4/6.99 74157 276-1829 SI 79 1.39 Med Ci, LED 276-040 2/69c 2/490 Red LED 74151 276-1834 S1 79 1.29 276-042 2/690 2/490 74 192 276-1831 SI 69 1.19 74193 276. 1820 S7 69 1.19 74194 276-1832 51 69 1.19 Project Accessories Diodes .4196 276-1833 51 69 1.29 Selected Last Now 74C and 4000 Series CMOS ICs Type Cat NO Vear Only 74C00 276-2301 S 69 490 164001 74CO2 276-2302 S 69 490 276 -1101 2/390 74C04 276-2303 S 69 490 154003 276 -1102 2/59c 2/490 '4, .,- 276-2305 5 69 490 154004 276 -1103 2 /69e 2/590 276.2310 S129 890 154005 276 -1104 2/79c 2/690 276-2112 5159 690 194735 276 -561 2/890 52 29 1.49 194739 276 -562 21890 52 49 1.69 194742 276 -563 2/89C 52 49 1.69 194744 276-564 2/890 4, iVi S 69 49C Trigger 4011 S 09 490 Diode 276 -1050 $ 49 390 4013 11t 51 29 890 4017 52 49 1.49 195401 276-1141 2/690 4020 52 49 1.49 195402 276 -1142 2/89c 2/790 X IC Troubleshooting Test Clip. Test up to 4027 51 29 890 165403 276 -1143 2/990 2/894 4049 .449 5 99 690 14 pins with probes or clips. Reg. 4.59 165404 276 -1144 2/S1.19 21990 4050 270-,450 $ 99 69C 276 -1950 Sale 2.99 PTC205 276 -1114 3/1.390 4511 276-2447 52 69 1.69 X IC Troubleshooting Test Clip. Test up to ¿SIR _70_24,, 5249 1á9 16 pins with probes or clips. Reg 4 99 SCR's and Triacs 276 -1951 Sale 3.49 Last Now Device Rating Cat No c Experimenter Socket. 2,07 rows of 5 Vear Only connected tie 276-172. 9.95 Linear ICs points LASCR 200V. 1 6A 276.1095 51 59 99C r ai Bus Strip. 2x40 connected tie SCR 39 89e First Devices by s points 2005.69 276.1067 SI Quality Clips to socket above 276 -173 1.99 SCR 400V. 6A 276 -1020 $1 49 99e National Semiconductor 1 J ì 0 6 Standard Edge -Card Board. 22 -pin. Tnac 200V.66 276-1001 S1 39 89C and Motorola J U 1295 mounting holes 276 -152 2.99 E Tnac 4005.6A 276.1000 S1 49 990 s 2- Voltage Source Edge -Card Board. OR 50P15 1 4g 276-1151 79e Cat Last NOW 100PIV, 1 40 No Year ONLY 1368 mounting hales. 276-154 2.99 BR 276 -1152 994 3- Voltage Source Edge -Card Board. BR 1005.45 2761171 1.49 301AH 276 -017 $ 69 49e BR 200V. 4A 276-1172 1.69 1368 mounting holes 276-153 2.99 324N 276-1711 $1.99 1.49 BR 400V.4A 276 -1173 1.89 TO 22-Pin Edge -Card Board 339N 276 -1712 $1 99 1.49 Cernedor. BR 50PIV.6A 276 -1180 1.99 386CN 276-1731 $1 99 990 44- terminals 276 -1551 2.99 555CN 276-1723 $1 49 794 X 100 -Pin Edge -Card Board Connector. 79 556CN 276-1728 $2 1.39 For standard S -100 hobby computer bus 566CN 276 -1724 $2 99 1.69 Digital Car 276 -1554 4.99 each or 5719.95 gj 567CN 276-1721 $2.99 1.99 si DIP Header. 16-pin spacing Transformers 723CN 276-1740 5 99 694 Clock Module 741CN 276 -007 6 69 49C 276 -1980 1.29 6 -3 Volts 1.2 Amps. 11 /.x110 /,ex1n /,, 741H 276 -010 $ 69 490 Xi Right Angle IC Socket. Mount LED's 273 -050 2 29 276-1713 $1 39 16 3900N 990 vertically -pin spacing 6 -3 Volts, 3 Amps. 25,ex203/41 Just add switches and install! Type MA 10:3, 3909N 276 -1705 $1 29 990 275 -1985 1.49 273 -1510 3 99 with MOS /LSI clock circuit chip, lirEen 39115 276 -1706 $ 2 19 1.99 Metal Cabinet. 31/.x2360(4 12 Volts 5 4x2x21/2". Reg. 4558CN 276 -038 $ 99 790 Amps. 8.95. fluorescent display with four 0.3" digit:. F as 270 -251 2.59 75491 276 -1701 $1 49 99C 273-1513 Sale 6.95 2.09 MHz crystal, blinking colon activity indi- r. Metal Cabinet. 4x23xx6" 75492 276-1702 $1 49 990 18 Volts (Center Terminal), 4 Amps. Ideal cator. Six -pin edge- connector. Foi 7805 276 -1770 $1 59 1.29 270 -252 3.49 for 5V (using CT), or 12V solid -state regu- any 7812 51.59 Metal 61.
Load more

Recommended publications
  • Questions for Electronics
    www.YoYoBrain.com - Accelerators for Memory and Learning Questions for electronics Category: Default - (192 questions) What electronic device is a breakover diode diac made to trigger triacs in phase-controlled circuits 3 basic options for converting single phase to static, rotary, and electronic 3 phase power Define: static phase converter simplest/lowest cost option for converting single to 3 phase electricity Nothing more than a capacitor and a potential relay comprising a starter circuit Define: rotary phase converter consists of a 3-phase motor and some way of starting it, be it a rope and pulley or a well-designed static converter automatic start circuit converts single phase to 3 phase electricity Define: variable frequency drive a box of solid-state electronics that convert 3-phase 60 Hz AC to variable frequency 3-phase. Allows motors to be driven at different speeds Define: polarized plug a plug that must be plugged in correctly to reference line on ac plug or it will harm the equipment Define: Shockley diode special purpose diode with more 2 PN junctions (four-layer diode) uses a trigger voltage to switch the diode on What is the purpose of SSIFET transistors used in microwave frequency circuits Define: latching relay a relay where one control pulse closes the switch contacts and it remains closed until another signal tells it to release Define: component placement diagram used to show where components are layed out on circuit board Define: cold solder joints a rough and grainy solder joint; source of many problems on circuits
    [Show full text]
  • Teccor® Brand Thyristors Qxxxxltx Series
    Teccor® brand Thyristors 4 / 6 / 8 / 10 / 15 Amp Quadracs QxxxxLTx Series RoHS ® Description The Quadrac is an internally triggered Triac designed for AC switching and phase control applications. It is a Triac and DIAC in a single package, which saves user expense by eliminating the need for separate Triac and DIAC components. Standard type devices normally operate in Quadrants I & III triggered from AC line. Alternistor type Quadracs are used in circuits requiring high dv/dt capability. Features & Benefits Agency Approval • RoHS Compliant • Surge capability up to 200 A • Glass – passivated Agency Agency File Number junctions ® L Package : E71639 • Voltage capability up to 600 V Schematic Symbol Applications Excellent for AC switching and phase control applications such as lighting and heating. Typical applications are AC MT2 MT1 solid-state switches, light dimmers, power tools, home/ brown goods and white goods appliances. T Alternistor Quadracs (no snubber required) are used in applications with extremely inductive loads requiring highest commutation performance. Main Features Internally constructed isolated package is offered for ease Symbol Value Unit of heat sinking with highest isolation voltage. IT(RMS) 4 to 15 A VDRM / VRRM 400 to 600 V Additional Information DIAC VBO 33 to 43 V Datasheet Resources Samples © 2014 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/14/14 Teccor® brand Thyristors 4 / 6 / 8 / 10 / 15 Amp Quadracs Absolute Maximum Ratings Value Symbol Parameter Unit Qxx04LT Qxx10LT /
    [Show full text]
  • Catalogo Tiristor
    Thyristor Product Catalog Teccor Electronics 1800 Hurd Drive Irving, Texas 75038 United States of America Phone: +1 972-580-7777 Fax: +1 972-550-1309 Website: http://www.teccor.com E-mail: [email protected] ©2002 Teccor Electronics i http://www.teccor.com Thyristor Product Catalog +1 972-580-7777 Teccor Electronics reserves the right to make changes at any time in order to improve designs and to supply the best products possible. The information in this catalog has been carefully checked and is believed to be accurate and reliable; however, no liability of any type shall be incurred by Teccor for the use of the circuits or devices described in this publication. Furthermore, no license of any patent rights is implied or given to any purchaser. Teccor Electronics is the proprietor of the QUADRAC® trademark. is a registered trademark of Underwriters Laborato- ries, Inc. All other brand names may be trademarks of their respective companies. To conserve space in this catalog, the trademark sign (®) is omitted. http://www.teccor.com ii ©2002 Teccor Electronics +1 972-580-7777 Thyristor Product Catalog Contents Product Selection Guide Product Descriptions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - vi Circuit Requirement Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - vii Product Packages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - viii Description of Part Numbers- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - x Quality
    [Show full text]
  • Thyristors This Worksheet and All Related Files Are Licensed Under The
    Thyristors This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/, or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA. The terms and conditions of this license allow for free copying, distribution, and/or modification of all licensed works by the general public. Resources and methods for learning about these subjects (list a few here, in preparation for your research): 1 Questions Question 1 All thyristor devices exhibit the property of hysteresis. From an electrical perspective, what is ”hysteresis”? How does this behavior differ from that of ”normal” active semiconductor components such as bipolar or field-effect transistors? file 01089 Question 2 What is required to make a Shockley diode or DIAC begin conducting current? What condition(s) have to be met in order for electrical conduction to occur through one of these devices? Also, explain what must be done to stop the flow of electric current through a Shockley diode or a DIAC. file 01090 Question 3 Silicon-controlled rectifiers (SCRs) may be modeled by the following transistor circuit. Explain how this circuit functions, in the presence of and absence of a ”triggering” voltage pulse at the gate terminal: Load Anode Gate Cathode file 01088 2 Question 4 Shown here is an illustration of a large ”stud mount” type of SCR, where the body is threaded so as to be fastened to a metal base like a bolt threads into a nut: With no test instrument other than a simple continuity tester (battery and light bulb connected in series, with two test leads), how could you determine the identities of the three terminals on this SCR? Hint: The threaded metal base of the SCR constitutes one of the three terminals.
    [Show full text]
  • Qxxxxltx Series Rohs ®
    Teccor® brand Thyristors 4 / 6 / 8 / 10 / 15 Amp Quadracs QxxxxLTx Series RoHS ® Description The Quadrac is an internally triggered Triac designed for AC switching and phase control applications. It is a Triac and DIAC in a single package, which saves user expense by eliminating the need for separate Triac and DIAC components. Standard type devices normally operate in Quadrants I & III triggered from AC line. Alternistor type Quadracs are used in circuits requiring high dv/dt capability. Features & Benefits Agency Approval • RoHS Compliant • Surge capability up to 200 A • Glass – passivated Agency Agency File Number junctions ® L Package : E71639 • Voltage capability up to 600 V Schematic Symbol Applications Excellent for AC switching and phase control applications such as lighting and heating. Typical applications are AC MT2 MT1 solid-state switches, light dimmers, power tools, home/ brown goods and white goods appliances. T Alternistor Quadracs (no snubber required) are used in applications with extremely inductive loads requiring highest commutation performance. Main Features Internally constructed isolated package is offered for ease Symbol Value Unit of heat sinking with highest isolation voltage. IT(RMS) 4 to 15 A VDRM / VRRM 400 to 600 V DIAC VBO 33 to 43 V QxxxxLTx Series 1 ©2014 Littelfuse, Inc Specifications are subject to change without notice. Revised: 06/05/14 Teccor® brand Thyristors 4 / 6 / 8 / 10 / 15 Amp Quadracs Absolute Maximum Ratings Value Symbol Parameter Unit Qxx04LT Qxx10LT / Qxx10LT Qxx15LT / Qxx15LT Qxx06LT / Qxx06LT / Qxx08LT Qxx10LTH Qxx15LTH Qxx06LTH Qxx08LTH Qxx04LT: TC = 95°C IT(RMS) RMS forward current Qxx06LT/Qxx08LT/Qxx10LT: TC = 90°C 4 6 8 10 15 A Qxx15LT: TC = 80°C single half cycle; f = 50Hz; 46 65 83 100 167 T (initial) = 25°C I Peak non-repetitive surge current J A TSM single half cycle; f = 60Hz; 55 80 100 120 200 TJ (initial) = 25°C 2 2 2 I t I t value for fusing tp = 8.3ms 12.5 26.5 41 60 166 A s di/dt Critical rate-of-rise of on-state current f = 60Hz; TJ =125°C 50 70 100 A/µs IGM Peak gate current TJ = 125°C 1.
    [Show full text]
  • Thyristors Product Selection Guide
    Teccor® brand Thyristors PRODUCT SELECTION GUIDE Switching Thyristors Switching Thyristors are solid state switches that are normally open circuits (very high impedance), capable of withstanding rated blocking/off-state voltage until triggered to on state. Used for circuit control applications, Littelfuse offers TRIAC, QUADRAC, SCRs, SIDAC, Rectifiers plus Alternistor Triacs for best commutating and noise immunity. Offered in various and other configurations for a wide range of currents blocking/off-state voltages, packages, and triggering. Through-Hole Packages: Others: DO-15 TO-92-2L TO-92-3L TO-251 TO-220 TO-218 TO-218X TO3 Fastpak Surface Mount Packages: SOT-89 SOT-223 Compak DO-214AA TO-252 TO-263 IT(RMS) VDRM/VRRM IGT (Q1) Series Through-Hole Surface Mount TO-92 TO-251 Isl TO-220 Non-Isl TO-220 Isl TO-218 Isl TO-218X TO-3 Compak SOT-223 TO-252 TO-263 Sensitive Standard Alternistor Triac 0.8A 400-600V 3-25mA LxX8Ex QxX8Ex • • LxXx QxXx 0.8A 400-600V 3-5mA LX8 • • 1.0A 400-600V 3-25mA Lx01Ex,LxNx Qx01Ex,QxNx • • 1.0A 400-800V 3-10mA L01 • • 4A 400-1000V 3-25mA Lxx04xx Qxx04xx • • • • 6A 400-1000V 5-50mA Lxx06xx Qxx06xx Qxx06xHx • • • • • 8A 400-1000V 5-50mA Lxx08xx Qxx08xx Qxx08xHx • • • • • 600V 10mA Q6008LH1LED • 10A 400-1000V 25-50mA Qxx10xx Qxx10xHx • • • 12A 400-1000V 10-50mA Qxx12xHx • • • 600V 10mA Q6012LH1LED • 15A & 16A 400-1000V 10-80mA Qxx15xx Qxx16xHx • • • 25A 400-1000V 50-80mA Qxx25xx Qxx25xHx • • • • • • 25A 600V 50mA HQ6025xH5 • • • • 30A & 35A 400-800V 50mA Qxx35xx Qxx35xHx • • • • 40A 400-1000V 50-100mA Qxx40xx • • 3 ©2013 Littelfuse, Inc Specifications are subject to change without notice.
    [Show full text]
  • Thyristor Product Catalog
    查询8T64SH供应商 捷多邦，专业PCB打样工厂，24小时加急出货 Thyristor Product Catalog Teccor Electronics 1800 Hurd Drive Irving, Texas 75038 United States of America Phone: +1 972-580-7777 Fax: +1 972-550-1309 Website: http://www.teccor.com E-mail: [email protected] ©2002 Teccor Electronics i http://www.teccor.com Thyristor Product Catalog +1 972-580-7777 Teccor Electronics reserves the right to make changes at any time in order to improve designs and to supply the best products possible. The information in this catalog has been carefully checked and is believed to be accurate and reliable; however, no liability of any type shall be incurred by Teccor for the use of the circuits or devices described in this publication. Furthermore, no license of any patent rights is implied or given to any purchaser. Teccor Electronics is the proprietor of the QUADRAC® trademark. is a registered trademark of Underwriters Laborato- ries, Inc. All other brand names may be trademarks of their respective companies. To conserve space in this catalog, the trademark sign (®) is omitted. http://www.teccor.com ii ©2002 Teccor Electronics +1 972-580-7777 Thyristor Product Catalog Contents Product Selection Guide Product Descriptions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - vi Circuit Requirement Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - vii Product Packages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - viii Description of Part Numbers- - - - - - - - - - - - - - - - - - - - - -
    [Show full text]
  • ON Thyristor Application Note
    Teccor® brand Thyristors AN1001 Fundamental Characteristics of Thyristors The connections between the two transistors trigger Introduction the occurrence of regenerative action when a proper AN1001 The Thyristor family of semiconductors consists of several gate signal is applied to the base of the NPN transistor. very useful devices. The most widely used of this family Normal leakage current is so low that the combined hFE are silicon controlled rectifiers (SCRs), Triacs, SIDACs, and of the specially coupled two-transistor feedback amplifier DIACs. In many applications these devices perform key is less than unity, thus keeping the circuit in an off-state functions and are real assets in meeting environmental, condition. A momentary positive pulse applied to the gate speed, and reliability specifications which their electro- biases the NPN transistor into conduction which, in turn, mechanical counterparts cannot fulfill. biases the PNP transistor into conduction. The effective hFE momentarily becomes greater than unity so that the This application note presents the basic fundamentals specially coupled transistors saturate. Once saturated, of SCR, Triac, SIDAC, and DIAC Thyristors so the user current through the transistors is enough to keep the understands how they differ in characteristics and combined hFE greater than unity. The circuit remains “on” parameters from their electro-mechanical counterparts. until it is “turned off” by reducing the anode-to-cathode Also, Thyristor terminology is defined. current (IT) so that the combined hFE is less than unity and regeneration ceases. This threshold anode current is the holding current of the SCR. SCR Geometric Construction Basic Operation Figure AN1001.3 shows cross-sectional views of an SCR Figure AN1001.1 shows the simple block construction of an chip and illustrations of current flow and junction biasing in SCR.
    [Show full text]
  • Load Ac Source Quadrac
    USOO5854519A Ulllted States Patent [19] [11] Patent Number: 5,854,519 Gershen et al. [45] Date of Patent: Dec. 29, 1998 [54] ASYMMETRICAL AC TRIGGER [56] References Cited SIMULATION U.S. PATENT DOCUMENTS [75] Inventors: Bernard J. Gershen, Centerport; 4,006,368 2/1977 Ichikawa ............................... .. 327/457 Alfred J. Lombardi, La Grangeville; 4,914,327 4/1990 Dekker ...... .. .. 327/457 EdwardYevgeny JISha?r, Krajci, Jamaica Franklin Estates, Square; an of 5,668,496 9/1997 GershenRebordosa Ct 8.1............................. ... 327/452 NY Primary Examiner—Richard T. Elms [73] AS _ L M f C I Attorney, Agent, or Firm—Paul J. Sutton s1gnee: eviton anu acturing 0., nc., Little Neck, NY. [57] ABSTRACT The present invention teaches a dimmer Which incorporates [21] Appl- NO-I 821,748 an alternating current (AC) trigger Which exhibits asym [22] F1led. _ Mar 20 1997 metrlcai 1 e 1 ectr1cai 1 c h aracter1st1cs.i ' Th‘1s e 1.1m1natest i h e un d e ' ' ’ sirable snap on hysteresis effect associated With conven R l t d U.S. A l - t - D t tional dimmers utilizing symmetrical AC triggers such as e a e pp lea Ion a a diacs and silicon bilateral sWitches (SBS). One embodiment [63] Continuation of Ser_ No_ 1837459’ Jam 18’ 1994’ Pat NO_ of the present invention utilizes a Zener diode to create the 5,619,081' asymmetry. Dunng one polarity of the AC source, the 6 breakover voltage of the trigger is increased 9 forcing the [51] Int. Cl. ................................................... .. H01H 47/00 trigger to breakover at a time later in the AC Cycle than it [52] _ 307/125; 327/457 Would otherWise have With a symmetric trigger.
    [Show full text]
  • Chapter 1 TRIAC
    Triac Contents 1 TRIAC 1 1.1 Physical operation ........................................... 1 1.1.1 Triggering in Quadrant I ................................... 2 1.1.2 Triggering in Quadrant II ................................... 2 1.1.3 Triggering in Quadrant III .................................. 2 1.1.4 Triggering in Quadrant IV .................................. 2 1.2 Typical issues ............................................. 2 1.2.1 Gate threshold current, latching current and holding current ................. 3 1.2.2 Static dv/dt .......................................... 3 1.2.3 Critical di/dt ......................................... 3 1.2.4 Commutating dv/dt and di/dt ................................. 4 1.3 Snubber circuits ............................................ 4 1.4 Application .............................................. 4 1.5 Example data ............................................. 4 1.6 Three-quadrant TRIAC ........................................ 4 1.7 See also ................................................ 5 1.8 References .............................................. 5 1.9 Further reading ............................................ 5 1.10 External links ............................................. 5 2 Thyristor 6 2.1 Introduction .............................................. 6 2.1.1 Function of the gate terminal ................................. 7 2.1.2 Switching characteristics ................................... 7 2.2 History ................................................. 8 2.2.1 Etymology .........................................
    [Show full text]
  • Phase Control Using Thyristors
    Teccor® brand Thyristors AN1003 Phase Control Using Thyristors It is important to note that the circuit current is determined Introduction by the load and power source. For simplification, assume Due to high-volume production techniques, Thyristors the load is resistive; that is, both the voltage and current are now priced so that almost any electrical product can waveforms are identical. benefit from electronic control. A look at the fundamentals of SCR and Triac phase controls shows how this is possible. Full-wave Rectified Operation Voltage Applied to Load Output Power Characteristics Phase control is the most common form of Thyristor power control. The Thyristor is held in the off condition -- that is, all current flow in the circuit is blocked by the Thyristor except a minute leakage current. Then the Thyristor is triggered Delay (Triggering) Angle into an “on” condition by the control circuitry. Conduction Angle For full-wave AC control, a single Triac or two SCRs connected in inverse parallel may be used. One of two Figure AN1003.2 Sine Wave Showing Principles of Phase methods may be used for full-wave DC control -- a bridge Control rectifier formed by two SCRs or an SCR placed in series with a diode bridge as shown in Figure AN1003.1. Different loads respond to different characteristics of the AC waveform. For example, some are sensitive to average voltage, some to RMS voltage, and others to peak voltage. Various voltage characteristics are plotted against conduction angle for half- and full-wave phase control circuits in Figure AN1003.3 and Figure AN1003.4.
    [Show full text]
  • Rangkaian Dimmer Pengatur Iluminasi Lampu Pijar Berbasis Internally Triggered TRIAC
    Rangkaian Dimmer Pengatur Iluminasi Lampu Pijar Berbasis Internally Triggered TRIAC Herlan Briliant Adhi Prabowo Bidang Komputer Bidang Komputer Pusat Penelitian Informatika LIPI Pusat Penelitian Informatika LIPI [email protected] [email protected] Abstrak Salah satu implementasi piranti semikonduktor adalah untuk rangkaian dimmer yang dapat digunakan pada pengaturan iluminasi lampu pijar. Pengaturan iluminasi pada lampu AC memiliki kompleksitas yang berbeda dengan lampu dc. Metode yang digunakan adalah dengan pengaturan sudut phasa penyalaan gelombang AC dengan piranti semikonduktor sejenis TRIAC dan DIAC. Pada percobaan ini digunakan piranti Internally Triggered TRIAC sebagai inti rangkaian dimmer. Penelitian ini dilakukan untuk memperoleh sistem yang responsif terhadap iluminasi sebuah lampu pijar, melalui pengaturan Tegangan Root Mean Square. Dengan menggunakan Integrally Triggered Triac rangkaian dimmer memiliki respon yang signifikan terhadap pengaturan iluminasi lampu pijar. Kata kunci: TRIAC, dimmer, iluminasi, Lampu Pijar ruangan mendapat pencahayaan yang cukup, 1. Pendahuluan tidak berlebihan ataupun kekurangan yang dapat menimbulkan ketidaknyamanan. Pengaturan iluminasi cahaya lampu pijar Pengaturan iluminasi pada sebuah lampu pada sumber tegangan searah (DC/Direct dengan tegangan AC dipengaruhi oleh Current) cukup sederhana untuk impedansi lampu tersebut, dimana diimplementasikan hanya dengan pengaturan impedansi akan mempengaruhi, pengaturan tegangan menggunakan variabel arus, tegangan dan frekuensi
    [Show full text]