Size: 8.0" x 2.2" x 1.6" |
411: Telephone Kit
Clear and white models
Pulse and tone dialing
2-color student manual
Highest education content
Lowest prices
411C (Clear) has colorful neon lamps that flash when the phone rings. Both models include comprehensive 2-color, 40-page manual that teaches telephone history and operation from the early telegraph to the modern-day telephone company central office. Step-by-step instructions and 49 2-color illustrations guarantee student success. Includes 2 PCBs, high-tech IC, transistors, diodes, high-performance microphone, conductive rubber keypad, wall mount cradle, baseboard mounting jack, and more!
Order No. 411--White
Order No. 411C--Clear |
Size: 1.5" x 3.5" x 2.6"
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502: 6/9 Volt Power Supply
Filtered
Step down transformer
Battery eliminator
Neon pilot light
24-page student manual
AC operated A beginner's project, Model 502 covers electronics theory including filtering, rectification, transformers, and more. The output is easily switched from 6 to 9Vdc and maximum current is 100mA. Use to power small electronic items such as transistor radios. |
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Size: 4.0" x 5.0" x 6.2" |
523NB: Strobe Light Without Breadboard
523: With Breadboard
Variable flash control
32-page student manual
AC operated Graymark's Model 523 Strobe Light is an intermediate project that covers basic electronics theory in the areas of RC timing circuits, gas filled tubes, voltage doublers, and much more. The flash speed is adjustable from 1 to 5 flashes per second and tube life is about 500,000 flashes. |
Size: 5.75" x 3.25" x 1.75" |
536NB: AM Transistor Radio Without Breadboard
536: With Breadboard
8 transistors
Push-pull output
88-page student manual
Battery operated
Superheterodyne circuit
Separate local oscillator This popular advanced project covers radio receiver and superheterodyne theory in depth. The manual contains special sections on acoustic and electromagnetic energy, energy transfer systems, and development of the superheterodyne circuit. The radio circuit is highlighted by a separate local oscillator for high sensitivity and excellent selectivity., Requires one 9V battery (not included).
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Size: 7.25" x 4.75" x 3.25" |
540: Binary Clock
10 TTL integrated circuits
Voltage regulator
Binary coding system
80-page student manual
AC operated
This comprehensive advanced project contains a series of digital logic experiences covering Transistor-Transistor Logic (TTL) and the binary numbering system. Binary counters, AND, OR & NAND gates are discussed in detail. Areas of electronics theory include pulse shaping, transistors, rectification, and transformers.
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Size: 3.6" x 5.0" x 1.7" |
542: AM/FM Portable Radio
Use of test equipment optional
64-page student manual
16 PCB test points
Unsealed FM tuning section
3 IC superheterodyne circuit
Perform alignment and many experiments without expensive test equipment. Experiment topics include amplification, dB, feedback, distortion, heterodyne, modulation, demodulation, detector, and AFC. The state-of-the-art circuit and modern styling with LED tuning indicator, auto-off and comfortable headphones will give years of listening pleasure. Requires two AA batteries (not included).
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