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Summary of Contents for Elenco Electronics K-20
- Page 1 NERVE TESTER KIT MODEL K-20 Assembly and Instruction Manual Elenco Electronics, Inc. Copyright © 1989 Elenco Electronics, Inc. Revised 2002 REV-E 753220...
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Page 2: Parts List
If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this nerve tester kit from a distributor, catalog, etc., please contact Elenco Electronics (address/phone/e-mail is at the back of this manual) for additional assistance, if needed. -
Page 3: Theory Of Operation
INTRODUCTION Test your nerve with the Nerve Tester Kit. It takes a steady hand, should you touch the twisted wire with the probe, a slight electrical shock will be felt. The shock is very weak and harmless. For the weak of heart or “chickens”... - Page 4 CONSTRUCTION Introduction The most important factor in assembling your K-20 Nerve Tester Kit is good soldering techniques. Using the proper soldering iron is of prime importance. A small pencil type soldering iron of 25 - 40 watts is recommended. The tip of the iron must be kept clean at all times and well tinned.
- Page 5 ASSEMBLE COMPONENTS TO THE PC BOARD T1 - Transformer Insert the transformer into the PC board as shown. Solder the four leads into place and cut off the excess leads. P1 - Probe (see Figure A) R2 - 47kW 5% 1/4W Resistor (yellow-violet-orange-gold) H1 - Twisted Wire (see Figure B) R1 - 470W 5% 1/4W Resistor...
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Page 6: Component Check
3. Push switch S1 to reset the LED. TROUBLESHOOTING Contact Elenco Electronics if you have any problems. DO NOT contact your place of purchase as they will not be able to help you. 1. One of the most frequently occurring problems is poor solder connections. Tug slightly on all parts to make sure that they are indeed soldered. -
Page 7: Schematic Diagram
SCHEMATIC DIAGRAM 470W C106B SCR1 Probe 47kW QUIZ 1. The nerve tester produces a ______________ whenever the probe touches the twisted wire. 2. A “chicken” afraid of the shock will switch the nerve tester to the ______________ position. 3. The LED will light when a positive voltage touches the ___________ of the SCR. 4. - Page 8 Elenco Electronics, Inc. 150 W. Carpenter Avenue Wheeling, IL 60090 (847) 541-3800 http://www.elenco.com e-mail: elenco@elenco.com...
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