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December 25, 2010
This circuit measures the distance covered during a walk. [more]
December 3, 2010
This simple counter can be used to count pulses, as the basis for a customer counter (like you see at the doors of some stores), or for anything else that may be counted. [more]
October 3, 2010
This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants' pocket and the display is conceived in the following manner: the leftmost display D2 (the most... [more]
circuit from:http://www.extremecircuits.net/2009/12/digital-step-km-counter-circuit.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]
August 8, 2010
Here you will find a interesting collection from frequency dividers with division factor from 2 until 10. All the choices they are based in the 7490 that are a Decade and Binary Counter. [more]
August 8, 2010
The LED traffic Light circuit controls 6 LEDs (red, yellow and green) for both north/south directions and east/west directions. The timing sequence is generated using a CMOS 4017 decade counter and a 555 timer. Counter... [more]
August 8, 2010
This is an example of a set/reset flip flop using discrete components. When power is applied, only one of the transistors will conduct causing the other to remain off. The conducting transistor can be turned... [more]
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