6-12V VARIABLE REGULATED POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM

6-12V VARIABLE REGULATED POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM

Notes:

• C1 filters the noise and spikes off the AC. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals. Value can be between 10 and 100uF/25V.
• The output voltage is variable with the 10K-potentiometer.
• The transformer input voltage refer to your home power source.

HOBBY POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM

HOBBY POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM
The circuit is based around the 7805 voltage regulator. It has only 3 connections (input, output and ground) and it provides a fixed output. The last two digits of the part number specify the output voltage, eg. 05, 06, 08, 10, 12, 15, 18, or 24. The 7800 series provides up to 1 amp load current and has on-chip circuitry to shut down the regulator (rather than blowing out) if any attempt is made to operate it outside its safe operating area. (If this happens to you, let the chip cool down & attach the heatsink.)

BENCH POWER SUPPLY I CIRCUIT SCHEMATIC DIAGRAM

BENCH POWER SUPPLY I CIRCUIT SCHEMATIC DIAGRAM

This bench power supply features three solid-state DC power supplies. The first supply gives a +1.5 to +15 volts at 1 ampere. The second supply gives a -1.5 to -15 volts at 1 ampere. The third has a fixed 5V at 3 amperes. All DC supplies are fully regulated. A special IC circuit keeps the output voltage within .2V when going from no load to 1 ampere. The output is fully protected from short circuits. This supply is ideal for use in school labs, service shops or anywhere a precise DC voltage is required.

Take a note that based on the diagram, this circuit require 120V AC to 17V AC Center Tapped Transformer. If your country use 220V AC home electric, you MUST change the Transformer 220-240V AC to 18V AC Center Tapped Transformer.

3V-30V/3A ADJUSTABLE REGULATED POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM

3V-30V/3A ADJUSTABLE REGULATED POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM
This circuit featured with short circuit protection and overload protection.

DUAL OUTPUT STABILIZER POWER SUPPLY SCHEMATIC DIAGRAM

DUAL OUTPUT STABILIZER POWER SUPPLY SCHEMATIC DIAGRAM

Please take a note that this circuit require center tap transformer. for example, if you need 12v output, you should connect J1 to 15v transformer output, J2 connected to 0v and J3 connected to another 15V.

CIRCUIT 13.8 VOLT 20 A TRANSFORMERLESS POWER SUPPLY SCHEMATIC DIAGRAM

CIRCUIT 13.8 VOLT 20 A TRANSFORMERLESS POWER SUPPLY SCHEMATIC DIAGRAM

This 13.8 Volt 20 A regulated transformerless power supply. 20A transformer is very-very expensive, large in size and very heavy in weight.

CIRCUIT 0-30V STABILIZED VARIABLE POWER SUPPLY WITH CURRENT CONTROL SCHEMATIC DIAGRAM

CIRCUIT 0-30V STABILIZED VARIABLE POWER SUPPLY WITH CURRENT CONTROL SCHEMATIC DIAGRAM
You will able to adjust the output voltage from 0 volt up to 30 volt DC. You also able to adjust the current output value from 0.002 A to 3 A.