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3-30 V/2.5 A Stabilized variable power supply – Circuit Schematic
3-30 V/2.5 A Stabilized variable power supply
This is a very useful project for anyone working in electronics. It is a versatile power supply that will solve most of the supply problems arising in the every...
Variable power supply – Circuit Schematic
Variable power supply
T1 steps down AC voltage from 115VAC (or 220VAC) to about 8VAC and is then rectified via bridge rectifier BR1 to about 11.52Vdc. C1 filters off the AC ripple. I...
20kV Flyback power supply – Circuit Schematic
20kV Flyback power supply
The 555 is wired as an astable and the capacitor is charged only through the 4,7Kohm trimmer (notice the diode) and discharged only through the 2.2 Kohm trimmer...
0-50V 2A power supply with LM10C – Circuit Schematic
0-50V 2A power supply with LM10C
I use the lm10 IC because it has a reference voltage and that?s useful for dc power supply. With two ICs can take different output voltage and amperage. This ci...
Power Supply for the 8051 Microcontroller – Circuit Schematic
Power Supply for the 8051 Microcontroller
The power supply section is the important one. It should deliver constant output regulated power supply for successful working of the project. A 0-12V/500 mA tr...
Power Supply for the 8051 Microcontroller – Circuit Schematic
Power Supply for the 8051 Microcontroller
The power supply section is the important one. It should deliver constant output regulated power supply for successful working of the project. A 0-12V/500 mA tr...
Positive and negative from a battery LT1010 – Circuit Schematic
Positive and negative from a battery LT1010
A common need in many systems is to obtain positive and negative supplies from a single battery. Where current requirements are small, the circuit shown is a si...
Power down function – Circuit Schematic
Power down function
This circuit adds a power down function to analog I/O ports (for example, the AD7769 and AD7774). Moreover, the diodes ordinarily needed to protect the device...
14V Switching Power Supply – Circuit Schematic
14V Switching Power Supply
In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching transistor that supplies current to a small inductor. Energy is ...
0-15 Volt Tracking PS – Circuit Schematic
0-15 Volt Tracking PS
The linear dual tracking power supply, shown in the schematic, provides 0-15 volts, at 1/4 amp, maximum, using a discrete transistor regulator with op-amp feedb...
0-30 Volt Laboratory Power Supply – Circuit Schematic
0-30 Volt Laboratory Power Supply
The linear power supply, shown in the schematic, provides 0-30 volts, at 1 amp, maximum, using a discrete transistor regulator with op-amp feedback to control t...
6 Amp Solar Power Center – Circuit Schematic
6 Amp Solar Power Center
The SPC2 is a solar power center, it can be used to handle all of the power functions for small 12 Volt solar powered devices. It contains a photovoltaic charge...
0.7 - 24V /2A Power Supply – Circuit Schematic
0.7 - 24V /2A Power Supply
A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist`s workbench. This circuit is not an absolute novelty, but it is simple, r...
12 volt power supply (7812) – Circuit Schematic
12 volt power supply (7812)
Please operate caution when building this power supply. It is run on standard 117 ac current - and under the right circumstances 117 ac can kill you. Use a plas...
Over Voltage Protection – Circuit Schematic
Over Voltage Protection
Safety devices like fuses provide protection against excess current, but do nothing for transients and short duration spikes of high voltahe on the power supply...
UPS Power Supply – Circuit Schematic
UPS Power Supply
This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of ...
4 Amps Universal PSU – Circuit Schematic
4 Amps Universal PSU
A Universal Power supply based on the L200 regulator, which includes an outboard pass transistor to boost output currents up to 4 amps....
Transformerless PSU – Circuit Schematic
Transformerless PSU
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of resistance; and it doesn`t generate very much heat.The circuit dr...
Soft Start for PSU – Circuit Schematic
Soft Start for PSU
Two soft start power supplies. The output voltage slowly increases to the desired output. The output voltage rises slowly and reaches 15 V in 5 seconds. In o...
Rectification using a Gyrator Circuit – Circuit Schematic
Rectification using a Gyrator Circuit
To avoid excess ripple output on a power supply feeding a heavy load, usually a large value capacitor is chosen following the rectifier. In this circuit, C1 is...