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| Electronic Project Kits |
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ONE CHIP AM RADIO This is a complete AM radio for the standard broadcast band, most of which is on a single IC. Other components, such as the coils and variable capacitor to make a finished radio are included. The IC is the RF amp, detector and AGC circuitry. The IC’s output drives a two stage transistor audio amplifer and 3” speaker. Operates on 9 volt battery. A good kit for beginners to see and build. 80-630 .................................
$18.45 |
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TWO STATION INTERCOM (OR HARD WIRED LISTENER) Two units employ LM386 IC’s in each station. These need to be connected using a pair of wires (about 22 or 20 guage solid). You could power the remote from the base unit if you can run four wires. Each station has its own mike, speaker and amplifier. May be set up to monitor baby’s room etc.. 80-210 ................................. $20.95 |
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5 LED SEQUENTIAL FLASHER The circuit flashes 5 LED’s in sequence repeatedly until you turn it off. Flash rate is user adjustable. The circuit uses an IC chip-on-board which you will then mount on the included motherboard, battery holder is included. Powered by a 3 volt supply or battery, good for a child’s toy or for those “high-tech” looking special effects for stage plays etc.. 80-525 ................................... $9.95 |
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MOVEMENT
DETECTOR COMPONENTS This is not quite a complete kit, the package contains the three key parts for a PIR detector (personal infrared detector). You get the PCB mounted Fresnel lens, a PIR movement sensor and the integrated Circuit that we use in the full kit (No. 80-300). Included are eight pages of documentation notes and circuits to show you how to proceed. 80-620 ................................. $19.95 |
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THREE LIGHT/DARK ACTIVATED RELAY SWITCHES This kit is one of our three separate circuits in one, three separate PC boards etc.. This one will give you both useful circuits and experience in different approaches, circuit wise, to doing the same thing, controlling a device with a change of either light or darkness. Each kit is equiped with a relay rated up to 240VAC @ 5 Amps. You may either turn “on” or turn “off” the controlled device. A good kit for the student learning electronics. 80-790 ................................. $29.95 |
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78XX REGULATED
POWER SUPPLY This circuit can be made into a regulated power supply for voltages from five volts up to twenty-four volts.The user must add any of the standard 78xx TO-220 positive regulators (7805 or 7806 or etc...thru 7824) and the voltage will equal which ever part you select (the last two digits of the number indicates voltage; 7805 = five volts etc.). Input AC or DC (unregulated) about three volts greater then the desired output voltage, complete instructions included. The 7800 series outputs up to one ampere typically. LED indicator and on-board on/off switch. You could use this with a junk box AC or DC power supply or supply your own transformer etc.. 80-600 ................................... $9.95 |
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PROGRAMMABLE DICE The idea of an electronic dice game of one kind or another is almost as old as glaciers. But this one is very clever and includes software on a floppy (for the IBM PC) plus a huge manual describing how such things work, software for other projects etc.. This may be the most educational kit in the line. 80-710 ................................. $29.95 |
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DC MOTOR SPEED CONTROL Vary the speed of DC motors the very best way with this kit. Gear boxes can be costly and series resistors may cause stalling. This circuit delivers the voltage to the motor with pulses and the speed is controlled via pulse width modulation (PWM). The speed control is a potentiometer, for DC motors up to 100 volts at a maximum of five amps. 80-670 ................................. $29.95 |
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THREE TIMER CIRCUITS
Timer circuits are handy for many experimenter’s
laboratory 80-850 ................................. $38.95 |