Best Buy School Bell Alarm, mechanical, electrical, electronics, robotics and science projects, kits and ideas for electronics engineering and mini projects

1. www.kitsguru.com

2. In the kit School Bell Alarm when peon wants
to beep the school bell then they have to press
the momentary switch then school bell is on
for few second according to the value of
resistance and capacitance. We can change the
on time the changing by capacitor and
resistance.In this kit School Bell Alarm the first
block is power supply in which the input is
230V AC which is step down using the
transformer (12-0-12)
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