Triangle wave generator circuit with cmos inverter IC
It is easy use a few parts, you can make it now! Read more
CD40106
High power siren circuit using CD40106 and TIP31, small and easy
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 Read more