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Simple 12V to 9, 7.5 or 6V converter
You’re traveling and you forgot to bring DC to DC converter in your car, but you need it. This simple DC to DC converter circuit can help you. This DC to DC converter circuit enables transistorized...
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Single Output Power Supply +1.25 V to 28 V / 1A Based on LM317
This Single output power supply is based on the LM317 voltage regulator, a little more efficient in terms of noise and ripple rejection of 50 Hz, and can provide power for analog or digital circuits...
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Dual Polarity Power Supply +/- 15V based Transistors
This Dual supply circuit is suitable for installation of power analog (audio or measurement), it provides a bipolar voltage with voltage source between 20 and 50 V (in audio power amp, for example)....
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Voltage reducer 24V to 12 V at 2.5 A
This circuit is a voltage reducer 24V to 12V with output current of 2.5 A, it can adapt in a various uses, it is suitable to be installed on a truck because of all the electrical circuits of car audio,...
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Flashing battery monitor
Here is a simple battery monitor circuit in which the LED will continue flashing until battery voltage is above the level. Transistors Q1 and Q2 are wired as an astable multivibrator circuit. This...
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12V / 20A Regulated DC Power Supply
Here the circuit diagram of 12V / 20A Regulated DC Power Supply using 5 pieces of power transistor MJ2955, voltage regulator 78S12. It will give you regulated output voltage of 12V-15V 20A. A 350VA...
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Voltage Doubler from 6VDC to 12VDC
This is the circuit diagram of voltage doubler, or it can be called DC to DC converter circuit, from 6 Volt DC become 12V DC. This dc voltage doubler circuit will need about 2A from the 6V input...
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Triple Output DC Power Supply
This is the circuit diagram of triple output power supply. The output given are: Adjustable output +1.25V to +20VDC Splited / dual polarity output +12VDC and -12VDC Splited / dual polarity output...
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Mobile Charger with Voltage Converter
The circuit allows a simple and safe charging of 1-10 Ni-Cd or Ni-MH cells from a 12V source. The voltage converter can be operated at 6V, in this case is the max. output voltage 12V (no load). The...
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