12 Volt Power Supply LM7812
12 volt power supply to the circuit below using voltage regulator IC LM7812 and able to supply current of 1 ampere. 12 volt power supply circuit is very simple and easy to make, all the components readily available in the market. Quality of power supply output voltage of 12 volts is very stable and capable of delivering up to 1 ampere current source. This power supply circuit can be used to supply voltage to the electronic device needs 12 volt input voltage source. Complete image series and the components used to assemble the power supply 12 volt LM7812 can be seen in the following figure.
Circuit Of 12 Volt Power Supply 7812
12 volt power supply circuit in the image above 7812 consists of the following parts.
- Stepdown section, this section serves lower voltage AC 220 volts to 18 volts. Components used are18 volt transformer 2A without CT.
- Rectifier section, this section serves to rectify the AC voltage from the transformer. Component is used as a diode bridge rectifiers D1 4A and electrolytic capacitors C1 uF/25V 3300.
- Part of regulators, this section serves to control the output voltage of the power supply voltage to be stable at 12 volts DC. Section is organized by the regulator IC LM7812 positive voltage regulator and capacitor C2 100 uF/25V.
- Indicator section, this section serves to provide a sign or signal conditions with a marked power supply LED flame alive.
Circuit power supply is equipped with an excess flow protection fuse mounted before the transformer.
