Posted by: eleccircuit | June 8, 2011

Tri-Waveform Generator using IC-8038

The Tri-Waveform Generator can be used for a number of different uses. The one that I use it for is a signal generator to test circuits. The frequency range is 20 to 20khz. and can be adjusted by R1. The duty cycle or the time that the waveform is high and the time that the waveform is low can be adjusted by R4….Read more

Posted by: eleccircuit | June 28, 2010

Sun – Up Alarm

The Sun – Up Alarm can be used to provide a audible alarm for when the sun comes up or it can be used in a dark area and detect when a light comes on. ….
Sun – Up Alarm
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Posted by: eleccircuit | June 28, 2010

Travel Touch Alarm

The Travel Touch Alarm can be used to provide a audible alarm when someone touches the door knob or handle of your hotel room. The door knob or handle must be made of metal for the circuit to work. …
Travel Touch Alarm
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Posted by: eleccircuit | June 24, 2010

Tri-Waveform Generator (Easy Oscillator Generator)

The Tri-Waveform Generator can be used for a number of different uses. The one that I use it for is a signal generator to test circuits. The frequency range is 20 to 20khz. ….
Tri-Waveform Generator (Easy Oscillator Generator)
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Posted by: eleccircuit | June 18, 2010

Electronic Combination Lock

This circuit is very basic to build. To open a the lock which is connected to the K1 Load you must press each momentary switch in the correct sequence. The sequence used in this circuit is ….

Electronic Combination Lock
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