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This simple circuit is a DC-DC converter that converting up 12V source to a 24V . It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA. This DC-DC Converter can be used to charge one 12V battery from another, or step up the voltage just enough to provide necessary overhead for a 12V linear regulator. Using one op-amp as a squarewave oscillator to ring an inductor and another op-amp in a feedback loop, it won't drift around under varying loads, providing a stable 24V source for many applications. With a wide adjustment in output this circuit has many uses.  Parts List R1-R4,R7-R8 100K 1/4W Resistor  R5 470 Ohm 1/2W Resistor  R6 10K Linear Pot  C1 0.01uF Mylar Capacitor  C2 0.1uF Ceramic Disc Capacitor  C3 470uF 63V Electrolytic Capacitor  D1 1N4004 Rectifier Diode  D2 BY229-400 Fast Recovery Diode See Notes Q1 BC337 NPN Power Transistor  U1 LM358 Dual O...

Build a 12V To 24V DC-DC Converter Circuit Diagram .This simple 12V To 24V DC-DC Converter Circuit Diagram can provide up to 24V from a 12V source. It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA.  It can be used to charge one 12V battery from another, or step up the voltage just enough to provide necessary overhead for a 12V linear regulator. Using one op-amp as a square wave oscillator to ring an inductor and another op-amp in a feedback loop, it won't drift around under varying loads, providing a stable 24V source for many applications. With a wide adjustment in output this circuit has many uses.  12V To 24V DC-DC Converter Circuit Diagram Parts Part Total Qty. Description Substitutions R1, R2, R3, R4, R8, R7 6 100K 1/4W Resistor R5 1 470 Ohm 1/2W Resistor R6 1 10K Linear Pot C1 1 0.01uF Mylar Capacitor C2 1 0.1uF Ceramic Disc Capacitor C3 1 470uF 63V Electrolytic Capacitor D1 1 ...