Reading time: 4 minute This vintage DIY electronic kit is a time relay, with a time delay of at least 165 seconds, indicated (at that time) to signal the 3 minutes of a telephone call being exceeded. This 3-minute delay was used because at that time (1988), if this time was exceeded, additional costs were imposed. Of course, the assembly has various other applications in electronics and not only, being relatively easy to build.
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Reading time: 4 minute This vintage DIY electronic kit was launched on the market in 1981 and was an assembly loved by amateur electronics because of its simplicity and enough power for an apartment. The 2N3055 power transistors can be easily purchased as well as the other components. The article also specifies the values of recent equivalent components.
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Reading time: 5 minute This vintage DIY electronic kit is a light organ with 3 projectors (bulbs), with the light effects rate adjustable by a rotary knob. The bulbs will light up depending on the intensity of the input signal and its frequency, producing special lighting effects.
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Reading time: 3 minute The assembly is easy to do, being practically an interactive electronic kit for children. The scheme of this vintage DIY electronic kit consists of two stable tilting circuits (CBA).
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Reading time: 3 minute An audio frequency generator is an electronic assembly that must not be missing from the workshop or laboratory of any amateur electronics technician. Such a generator can be used in the most diverse electronic applications: debugging, generation of onomatopoeias, checking of audio frequency amplifiers, electronic sirens, etc.
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Reading time: 3 minute The vintage DIY electronic kit presented is a signal of the presence for dangerous places or difficult to observe at night. Because the signaling control starts at dusk and stops at dawn, this vintage DIY electronic kit falls into the realm of small automations.
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Reading time: 3 minute Remote control is a common procedure in many applications. Through audible signals or mechanical shocks, this vintage DIY electronic kit can put into operation a lamp, a motor, an electromechanical toy, etc. The scheme contains two amplification stages, a flip-flop and a final floor.
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Reading time: 3 minute Obtaining intermittent light signals with the help of electronic assemblies is a process found in many applications. This vintage DIY electronic kit, realizes these commands through an electronic circuit consisting of 2 transistors, a capacitor, 4 resistors and 4 lamps (bulbs).
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Reading time: 2 minute Remote control is a common procedure in many applications. Through audible signals, or mechanical shocks, this vintage DIY electronic kit can operate various electrical or electronic circuits.
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Reading time: 3 minute The number of possible applications with such a scheme is unlimited. We mention only a few of them: operating the garage doors, lighting some light bulbs depending on the daylight, ordering some toys, etc.
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