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Summary of Contents for Elenco Electronics K-16
- Page 1 ELECTRONIC CRICKET KIT MODEL K-16 Assembly and Instruction Manual Elenco Electronics, Inc. Copyright © 1989, 2002 Elenco Electronics, Inc. Revised 2003 REV-E 753216...
- Page 2 If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this electronic cricket kit from a distributor, catalog, etc., please contact Elenco (address/phone/e-mail is at the back of this manual) for additional assistance, if needed.
- Page 3 IDENTIFYING RESISTOR VALUES Use the following information as a guide in properly identifying the value of resistors. BAND 1 1st Digit Color Digit Black Brown Orange Yellow Green Blue Violet Gray White IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads), or mF (microfarads). Most capacitors will have their actual value printed on them.
- Page 4 CIRCUIT OPERATION Basically, the Electronic Cricket is a very high frequency oscillator which is turned on for a very short period of time, which makes it very difficult to find. Figure 1 Figure 1 shows the block diagram of the Electronic Cricket. The circuit consists of two oscillators, a very low frequency one cycle every two minutes and a very high 10,000 cycles per second.
- Page 5 CONSTRUCTION Introduction The most important factor in assembling your K-16 Electronic Cricket 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 6 ASSEMBLE COMPONENTS TO THE PC BOARD SPK - Speaker 4” Speaker Wires Q1 - 2N3904 Transistor (see Figure A) Q2 - 2N3906 Transistor (see Figure A) Q4 - 2N3906 Transistor (see Figure A) Q3 - 2N3904 Transistor (see Figure A) C2 - .01mF (103) Discap R3 - 1.5kW 5% 1/4W Resistor (brown-green-red-gold)
- Page 7 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. One of the most frequently occurring problems is poor solder connections. a) Tug slightly on all parts to make sure that they are indeed soldered. b) All solder connections should be shiny.
- Page 8 QUIZ 1. There are ________________ oscillators in the Electronic Cricket. 2. The frequency of these oscillators are ________ cycles per two minutes and ________ cycles per second. 3. The on-time for transistors Q1 and Q2 of the low frequency oscillator is ____________ seconds. 4.
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