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August 8, 2010
This circuit is a small digital roulette''. It is constituted by oscillator IC1, the counter IC2, the transistors Q1-7 that drive the display common cathode DSP1. The supply basically becomes from a battery 9V, but... [more]
August 8, 2010
The particular circuit is substantially a generator of accidental numbers, from 1 until the 6. The clue him we see in a line from led, that each one corresponds also in a number from the... [more]
August 8, 2010
The circuit turns on a light corresponding to the first of several buttons pressed in a "Who's First" game. Three stages are shown but the circuit can be extended to include any number of buttons... [more]
August 8, 2010
In all the houses exist the bells in the door. All want, they have the possibility of being possible to change the intensity, the tone of sound. With this circuit we have this possibility. With... [more]
August 8, 2010
If you’re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether someone rang while you were out.... [more]
circuit from:http://www.extremecircuits.net/2010/04/doorbell-memory-circuit-diagram.html
August 8, 2010
This is a classic divider of frequency via two. It is achieved with a classic circuit T-flipFlop, round IC1 [ 4011 ]. In the circuit, the frequency of network, after are limit the negative half-s... [more]
August 8, 2010
This frequency doubler using a single 4069 hex inverter IC, a frequency doubler can be constructed to give an output pulse train whose frequency is twice that of a squarewave input signal. [more]
August 8, 2010
This frequency doubler uses one CMOS quad, two input NAND gate package type 4011. [more]
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