Make Simple Electronic Buzzer circuit
This is buzzer circuit easy to build with small size,cheaper using normal transistor and small piezo speaker can use for 3V to 12V as use parts resistors[...]
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September 21, 2018
Three Simple Door Buzzer Circuits
Use low voltage so safe. I am boring old buzzer. When use AC line, danger of leakage power in the heavy rain, 3 circuits can help you!.. .......
August 30, 2017
The OFF After Delay circuit on Breadboard using MOSFET
Simple time Delay Circuit using MOSFET
For learn about MOSFET. I recommend Time Delay circuit easy to make and long time and a few parts than normal transistor
August 23, 2017
CD4060 Timer Circuit 22 seconds to 4 hours
This is IC 4060 Timer circuit. When rises time that is set, Suppose set 5 minutes time. after all time to 5 minutes. the circuit will emit a sound of buzzer once. [...]
August 5, 2017
Simple Headlight Warning buzzer circuit
Often drivers forgot to turn off lights when parking. They cannot start the machine, ran out battery. This Headlight Warning buzzer circuit can help.
April 4, 2017
Battery voltage monitor circuit by LM339
The simple low voltage tester circuit using LM339,can use Battery voltage monitor for voltage sources that problems, by LED display and alarm sound.
June 20, 2016
2 tone doorbell circuit using transistors
The 2 tone doorbell circuit, which is an electronic buzzer types,but them has melodic sound than general electric bell. People have seen two tone bell sound
November 28, 2013
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