Schematic Power Amplifier and Layout

Fire alarm beeping circuit diagram flame detection circuit flame detector sensor flame detector principle    

Electronic Circuit ding-dong Sound for any Alarm Basically the circuit alternates between two frequencies which are adjustable. This produces the “ding-dong” sound.

Portable detector Kristal Checker – Krystal Detector circuit using BC107 Kristal Checker – Krystal Detector circuit using BC107 Portable detector R1 ………….. 39K ohm R2 ………….. 1K ohm R3 ………….. 100K ohm C1 ………….. 680pF C2 ………….. 150pF C3 ………….. 1K pF C4 ………….. 4,7K pF TR1 …………. BC107 TR2 …………. BC107 D1 ………….. 1N60 […]

Op-Amp Booster Designs using BC549C, BC550C OpAmp Booster Designs using BC549C, BC550C

Making 22W Power Amplifier using TDA1554 Circuit diagram with main power IC TDA1554, this circuit works up to 22W. R1__________39K 1/4 Watt C1,C2_______10uf 25V C3__________100uf 25V C4__________47uf 25V C5__________0.1uf 25V C6__________2200uf 25V U1__________TDA1554 Making 22W Power Amplifier using TDA1554

Electric Heating circuit Electric Heating and Solar Water Heating System Controller Circuit