The old pc power supply circuit
Power supply
A good DC switching power supply circuit form old computer that not used. It has used powerful, durable and works great. Present, a computer become the electric appliance power needed for every home Because there are very useful. But lifetime limit and out of date very quickly. There are new program. Desired machine that has high efficiency. You can always change the new. (To a modern). -Where is the old computers? Most probably it will be discarded as spam. This may be very valuable for many people, including me. Many of the neighbors gave me an old computer always to …
Multi voltage power supply circuit  using IC-78xx series
Power supply
This is Multi voltage power supply circuit  as 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 …
Convert two-level DC voltage 5V, 12V
Power supply
Work cycle is entering AC Current power supply 220Volt the transformer T1 will convert AC to lower left 9V will be switched from AC power into DC with D1-D4 connected to circuit Rex Comment fire Bridge Terminal. (Bridge-Regtifier) will be Current Filter to smooth further the capacitor C1, which at this point can be used as Vout by’ll volt approximately 12Volt the output level one will be diode D5 acts to prevent AC voltage. through the connection of the output level will be a DC current flowing into pin 1 of IC1 by IC1 acts as the regulated voltage to …
Simple step down dc converter multi voltage
Power supply
This again the one circuit that can is dc regulator the many voltage get simplely. Or Simple step down dc converter multi voltage. By have R1 be formed fix the size of current, when Q1 2N3904 work by voltage output equal to volt at a pin B of Q1 2N3904. When compare with ground. Which volt be under zener diode the connection and a pin B of Q1. It can fix dc voltage many the level Vout : 3V that sizes have from VZD1, Vout = 6V Volt , fall straddle ZD1+ZD2, Vout 9V volt fall straddle ZD1+ZD2+ZD3, Vout 12V …