High power siren circuit using CD40106
This is High power siren circuit with small PCB size, using CD40106 and four transistor TIP31-TIP32 increase current to horn speaker 20W, 4-8ohm. , and
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October 31, 2018
3 Electronic Siren circuits using transistors
Today I would like to introduce the simple and economical simple siren circuits. It is suitable for beginners. My son will gradually build this circuit onto the PCB layout. Look at below! 4 Circuits.
August 14, 2017
AC 220V siren circuit using transistors
This AC 220V siren circuit is a simple siren that use 220V AC as power supply. It is small size and use a piezo speaker cause use low power and saving.
June 16, 2017
The 4 Sound effects generator using UM3561
Here is The 4 Sound effects generator using UM3561 and a few parts only. It can make siren, Ambulance sirens, Police car sirens, Fire truck siren and Space
June 15, 2017
Four siren sound generator circuit using UM3561
This is four siren sound generator circuit using UM3561,VR1 to take to control the frequency of oscillator circuit the internal IC, 8 ohms speaker output [....]
June 14, 2017
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