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Power Supplies: 12 Volt Power Supply Circuits - Power Supplies

12v power supply circuits and high-current power supplies.

Build your own power supply for your workshop, to power up an FM transmitter, etc.

Photo: Positive Adjustable Power Supply Positive Adjustable Power Supply
Compact positive (K124) and negative (K125) adjustable power supply +/-
Photo: Variable Power Supply Kit Variable Power Supply Kit
A handy portable power supply with a variable output voltage of 15VDC. Mounted in a rugged bakelite case.
Photo: Hobby Power Supply Kit using LM7805 Hobby Power Supply Kit using LM7805
This is a practical battery eliminator for your projects. This is a basic power supply using two 7805 regulators; input up to 20 VAC from a transformer. There are two outputs; one regulated at 5 VDC, and the other one is variable. Includes plastic case. T
LM317 1-25 Volts Variable DC 1.5 Amp Power Supply
3 Comments - in DC Power Supplies
An extremely simple and cheap DC power supply with variable voltage (1.2-25 Volts) control. The circuit uses an LM317 integrated voltage regulator Ic.
Photo: Bench DC Power Supply Kit Bench DC Power Supply Kit
Build this educational Deluxe Bench DC Power Supply Kit
Photo: Bench AC/DC Power Supply Kit Bench AC/DC Power Supply Kit
Build this educational Deluxe Bench DC Power Supply Kit
Photo: Universal Wall Adapter Power Supply Universal Wall Adapter Power Supply
This is a practical power supply for all your projects. It provides 6 different outputs between 6 and 20VDC @ 500mA.
Photo: LM317 Variable Power Supply LM317 Variable Power Supply
A very basic power supply that can be adjusted over a range of about 1.5 to 35 volts DC. If you add a heat sink (included), you can run it as hot as 2 Amps output; otherwise about 60 mA @ 12 volts. This is a text book circuit using an LM317, which is a 3
Photo: Variable Power Supply with Transformer Variable Power Supply with Transformer
A very basic power supply that can be adjusted over a range of about 1.5 to 35 volts DC. If you add a heat sink (included), you can run it as hot as 2 Amps output; otherwise about 60 mA @ 12 volts. This is a text book circuit using an LM317, which is a 3
Variable DC Power Supply (1-30 Volts, 5 Amps). LM338K Regulator
0 Comments - in DC Power Supplies
A very simple variable power supply with a DC output voltage adjustable from 1-3- Volts, with a maximum DC current of 5 Amps. Uses LM338 DC voltage regulator IC.
2N3055 Variable DC Voltage Power Supply
0 Comments - in DC Power Supplies
Variable-voltage DC power supply circuit. The output DC voltage is adjustable from 0.7-24V, with current limiting range from 50mA up to 2 Amps. Main transistor is the 2N3055.
Photo: Negative Adjustable Power Supply Negative Adjustable Power Supply
Compact negative adjustable power supply
Photo: 3 Amp Variable DC Power Supply 3 Amp Variable DC Power Supply
Provides 3 amps current at 3-30 Volts DC. Reduces ripple voltage to almost non-existant.
Circuit to Power Neon Desk Lamp
0 Comments - in Lights
A low power consumption circuit that uses few components in order to power a 6 inch fluorescent tube (AC) from 12 Volts DC.
Low Noise White LED Power Supply Circuit w/ Current Control
0 Comments - in LED Circuits
Circuit diagram for an ultra low-noise driver/supply circuit for white LEDs, using the IC LTC3201. Ensures a stable brightness in white LED driven items.
Photo: BW-TX50 - 50 Watt Stereo FM Transmitter BW-TX50 - 50 Watt Stereo FM Transmitter
The TX50 from Broadcast Warehouse is an extremely high quality stereo FM transmitter that complies with FCC Standards, meaning that it can be used for commerical broadcasting. Output power is 50 Watts.
Photo: BW-TX300 - 300 Watt Stereo FM Transmitter BW-TX300 - 300 Watt Stereo FM Transmitter
The TX300 from Broadcast Warehouse is an extremely high quality stereo FM transmitter that complies with FCC Standards, meaning that it can be used for commerical broadcasting. Output power is 300 Watts.
Photo: BW-TX150 - 150 Watt Stereo FM Transmitter BW-TX150 - 150 Watt Stereo FM Transmitter
The TX150 from Broadcast Warehouse is an extremely high quality stereo FM transmitter that complies with FCC Standards, meaning that it can be used for commerical broadcasting. Output power is 150 Watts.
Photo: BW-TX25 - 25 Watt Stereo FM Transmitter BW-TX25 - 25 Watt Stereo FM Transmitter
The TX25 from Broadcast Warehouse is an extremely high quality stereo FM transmitter that complies with FCC Standards, meaning that it can be used for commerical broadcasting. Output power is 25 Watts.
1 Watt PLL FM Transmitter Circuit by Veronica Kits
1 Comment - in FM Transmitters
The Veronica 1 Watt PLL FM Transmitter is a pretty decent broadcast PLL exciter or transmitter that can be used alone or with an RF power amplifier for high power radio broadcast.
Photo: BW-TX5 - 5 Watt Stereo FM Transmitter BW-TX5 - 5 Watt Stereo FM Transmitter
The TX5 from Broadcast Warehouse is an extremely high quality stereo FM transmitter that complies with FCC Standards, meaning that it can be used for commerical broadcasting. Output power is 5 Watts.