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Dual Regulated Power Supply – Circuit Schematic
Dual Regulated Power Supply
You need 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 an...
High Voltage Power Supply for Geiger Tubes – Circuit Schematic
High Voltage Power Supply for Geiger Tubes
These power supply circuits are generating 500 volts but they may be modified to supply a couple of hundred to nearly 1000 volts by changing the zener diodes. T...
Basic UPS PCB – Circuit Schematic
Basic UPS PCB
This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of ...
Very Low Dropout Adjustable Breadboard Power Supply – Circuit Schematic
Very Low Dropout Adjustable Breadboard Power Supply
This project details the design of a very low dropout adjustable power supply. A good power supply is essential to electronic projects. While there are many exi...
UPS For Cordless Telephones – Circuit Schematic
UPS For Cordless Telephones
Cordless telephones are very popular nowadays. But they have a major drawback, i. e. they cannot be operated during power failure. Therefore usually another ord...
Cordless Phone Backup – Circuit Schematic
Cordless Phone Backup
Normally the base of a cordless phone has an adaptor and the handset has Ni-Cd cells for its operation. The base unit becomes in-operative in case of power fail...
Schematics Low-Ripple Power Supply – Circuit Schematic
Schematics Low-Ripple Power Supply
This circuit can be used where a high current is required with a low-ripple voltage (such as in a high-powered class AB amplifier when high-quality reproduction...
Low Power 12V Transformerless Power Supply – Circuit Schematic
Low Power 12V Transformerless Power Supply
Many circuits can be powered directly from the mains with the aid of a series capacitor (C1). The disadvantage of this approach is that usually only one half cy...
ATX Power Switch Substitute – Circuit Schematic
ATX Power Switch Substitute
An additional push-button switch is normally required for the ATX Power Switch/Soft Power Switch signal, but you can do without it if you use this simple circui...
9V DC Adapter With Battery Backup – Circuit Schematic
9V DC Adapter With Battery Backup
With just a low cost DC adapter and the circuit described here it is possible to build a low cost stabilized, uninterruptable 9V supply. On the grounds of safet...
Schematics power supply switching PCB – Circuit Schematic
Schematics power supply switching PCB
The switching power supply provides 12 volts, at 10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedb...
usb power socket with indicator – Circuit Schematic
usb power socket with indicator
Today, almost all computers contain logic blocks for implementing a USB port. A USB port, in practice, is capable of delivering more than 100 mA of continuous c...
double symmetrical power supply – Circuit Schematic
double symmetrical power supply
If you wish to use a double power supply but don`t have a center trapped transformer you can use an electronic circuit in the following configuration. This elec...
power supply am farm radio – Circuit Schematic
power supply am farm radio
The affection of the ability accumulation is a Tamura 3FD-410 5V bifold primary/dual accessory transformer. These are accessible from DigiKey. com for reasonabl...
low power 12000 volt power – Circuit Schematic
low power 12000 volt power
If you need about 12, 000 volts DC for an ion generator this circuit might be the ticket. It draws power from the 120vac power line but it uses a small 6KV came...
caps provide voltage boost to – Circuit Schematic
caps provide voltage boost to
This circuit adds some capacitors and diodes to a traditional transformer type series regulator circuit to extend the normal operating range. It can insure regu...
lm317t power supply – Circuit Schematic
lm317t power supply
LM 317T power supply circuit. This power supply is very simple and timeless, contain very few components and will give very stable, regulated adjustable / varia...
5v dual power supply – Circuit Schematic
5v dual power supply
The circuit is using a 230V AC OR 110V AC to 9V-0-9V step down center tapped transformer to step down the mains voltages. Four 1N4001 diodes are used for rectif...
18v power supply using lm7818 – Circuit Schematic
18v power supply using lm7818
This power supply will work accurately where you have the need of stable 18V DC and provides current upto 1. 5A. The circuit is using a LM7818 positive voltage ...
12v power supply circuit – Circuit Schematic
12v power supply circuit
Here is a very simple and useful project of a 12V power supply circuit using LM7812 IC. LM7812 is a three terminal fixed voltage regulator IC comes in TO220 pac...