Battery Replacement Power Supply
Your child`s battery toy has failed and you have to fix it. Once you have managed to get it apart, the battery compartment is not likely to be connected to the ...
Adjustable Current Limit For Dual Power Supply
This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current...
5V Regulated Power SupplyCircuit
This circuit is a small +5V power supply, which is useful when experimenting with digital electronics. Small inexpensive wall tranformers with variable output v...
5V Power Supply For On-Train Radio Camera
A radio camera on a model railway should transmit constantly while the train is moving and continue transmitting for a few minutes after the train stops. But if...
48v phantom microphone power supply
48 V phantom` powering has become the standard for professional condenser microphones. The supply (or rather bias) voltage is applied over both wires of the bal...
12V Fan Directly on 220V AC
This circuit idea is certainly not new, but when it comes to making a trade-of between using a small, short-circuit proof transformer or a capacitive voltage di...
Overvoltage Protection Circuit
An overvoltage protection circuit is a circuit which protects electronics from excess voltage, which could potentially damage or destroy electronic components. ...
Alarm Power Supply
This Power Supply is suitable for the Modular Burglar Alarm. However, it has other applications. It is designed to provide an output of 12-volts, with a current...
An Add-on Current Limiter
This circuit allows you to set a limit on the maximum output current available from your PSU. It`s very useful when you power-up a project for the first time - ...
Small Variable Power Supply
Features: 1. 3-12. 2 V, 1 A, over-current protection. This is a simple but reliable device based one of the oldest integrated voltage regulators of them all - t...
Current Limiting Power Supply
This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluab...
9 Volt 2 Amp Power Supply
There is little to be said about this circuit. All the work is done by the regulator. The 78S09 can deliver up to 2 amps continuous output whilst maintaining a ...
Durst power supplies EST 301 and EST 450
Checked already the regulator board of the ES301 and it`s clear that the PCB contacts of the current sensing resistors R42 and R43 and severely burned. There is...
PC 12V Adapter
This circuit provides a short circuit protected power supply from PC 12V supply voltage. This is particularly handy when working with PC interfacing projects. F...
5A Lab Power Supply With Digital Readout
A used 250VA power transformer that was removed from equipment a couple of weeks ago. The transformer has a dual 10V AC output and a few auxiliary voltage outpu...
Complete SS Laser Power Supply Schematics
This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes rub...
Complete Ar/Kr Ion Laser Power Supply Schematics
The circuit is split into two sections: the isolated external loop which is connected to the remote interface connector on the front of the PSU and the non-isol...
HP calculator power supplies
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Complete Ar/Kr Ion Laser Power Supply Schematics
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LCC configuration for Tesla Coil impedance circuit
Because the coupling coefficient is so low, the primary self-inductance tends to short out the driving signal. However, if a series/parallel set of capacitors i...