12V Dual Power Supply | Electronic Project Circuits

Posts Tagged ‘12V dual power supply’

Multi level power supply with 78xx series

This is an electrical circuit to supply DC power positive and negative. It also has multiple power levels as well. The equipment it easy to buy and affordable.
Operation of this circuit, when T1 was to convert the AC voltage from 220 volts down to 15 volts, and D1-D4 connected to circuit Direct Contact bridge rectifier . Will act as a rectifier AC DC Then C1, C2, C5 and C6 serve filtered flows smooth and then, through to the leg 1 (Vin) of IC1 and IC2. By IC1 (LM7812) acts Direct loans isolate pressure for reduced + 12 volt and IC2 (LM7912) Direct loan serves to isolate pressure reduced to -12 volts passed through the pin 3 (Vout) of IC1 and IC2. and will be filtered to flow. more smooth with C3, C4, C7 and C8, which is the output voltage at +12 volts and -12 volts.
When T2 convert AC voltage from 220 volts down to 9 volt and D5-D8 of the circuit is Direct Contact Fire bridge. Will act as a rectifier AC DC After that, C9, C10, C13 and C14 is responsible for smoothing filter and then flows through to the leg 1 (Vin) of the IC3, and IC4. By IC3 (7805) Direct loan serves to isolate voltage down to +5. V and IC4 (7905) Direct loan serves to isolate pressure pressure reduced to -5 volt transmission out of leg 3 (Vout) of the IC3, and IC4 is filtered and flows more smooth. with C11, C12, C15 and C16. which makes the output voltage of +5 volts and -5 volts.

Be the first to comment - What do you think? Posted by admin - January 19, 2011 at 9:23 am

Categories: Power supply Tags: 12V dual power supply, IC 7905, multi voltage regulator

Single Chip dual power supply +12V -12V by LM326

This is idea circuit dual power supply +12V -12V by LM326 Single Chip IC.
I want to know the single IC which can provide Both + V and -V from a single +Vin supply.. I need this for my dual supply opamp.Reply me as soon as possible.

Read More Source:http://www.delabs-circuits.com/mailfaq/arc20061210.html
Thank you.

Be the first to comment - What do you think? Posted by admin - February 23, 2008 at 11:56 am

Categories: Power supply Tags: 12V dual power supply, dc voltage regulator, dual power supply, single chip power supply

Dual Voltage Regulated 5V 2A ,12V 2A by 7805×2 – 7812

A friend of mine who runs an electronic shop wants to install an old cd-rom to be used as a stand alone cd-player in his truck. His problem was to find a suitable power supply for this purpose. A cd-rom uses 2 power supplies, 5 Volts which is used in its logic circuit and 12 Volts for its servos. With these parameters I needed to make a dual regulator that produces 5 Volts and 12 Volts output in one input voltage. Trucks usually uses 2 lead-acid batteries so that will be around 24 Volts.

The cd-rom uses around 1.5 Amperes of current for the 5 Volts and 2 Amperes for the 12 Volts. Considering all the needed parameters, using two 7805 regulators for the 5 Volt supply will suffice however we need higher current for the 12 Volts. Using an “old-school” technique, we will be utilizing one 7812 regulator but putting an additional transistor to beef up its current capacity up to 5 Amps. I know its an overkill but better safe than sorry.