Circuit Project Electronic

83 light-emitting diodes provide very good looking holiday Bell that swings back and forth! Numerous green, red and yellow light emitting diodes provides a solemn bell holiday spirit at the moment to see! Computer mounted on board / off switch and standard power connector included. Runs on 9-12VDC or standard 9V battery
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This circuit uses just integrated number circuit LM3909 and capacitors outside. It work by use NiCad battery 1.25V sizes. or The dry cell is small-sized is other. The circuit can do to copy is like , prevent many the group. For use show winking according to want Battery Charger Circuit [...]

This circuit systematically main work from Oscillator Circuit. It is use UJT. The Q1 will give the period of time of pulse for trigger. The work of SCR for drive LED. The circuit will pull current 2 mA from just Battery 9V. When [...]