The proposed solution for protecting, protects connected consumers with a complete shutdown of their power. Growth failure, be it through positive or through negative part of power leads to complete exclusion from the power supply voltage of connected devices: laboratory sources with symmetrical voltage power supplies, battery chargers, low frequencies amplifiers, stabilized or no stabilized [...]

How to get 5 volts from a higher voltage?  Of course by LM7805. The fact that the chip is the LM7805 linear voltage regulator. This means that all the excess stress she planted on his. That is, when an input voltage of 12 V, she is forced to provide for themselves a voltage drop of [...]

How to convert ATX power supply into a bench supply.The power supply is based on an old pc ATX power supply. This is great because they are cheap, efficient and provide a huge amount of current on demand. He add an external voltage probe and a switch to allow voltage measurements either from the ammeter [...]

This circuit allows switching on a LED when the battery voltage (12V) drops below a certain threshold. The operating system is based on a comparison of tension, which comes in a zener diode. If the supply voltage is 12V and the zener diode is a 10V model (this is the case in the diagram), we [...]

The 78xx family is a very popular choice for many electronic circuits which require a regulated power supply, due to their ease of use and relative cheapness. When specifying individual ICs within this family, the xx is replaced with a two-digit number, which indicates the output voltage  the particular device is designed to provide (for [...]

In this project Dilshan design an Inverter to convert 12V DC power source to 230V AC power. This system consist 3 main stages such as oscillator, switching circuit and step up transformer stage. In oscillator we use 4047 CMOS astable multivibrator to generate nearly 60Hz oscillation. Source:Dilshan Download: Complete schematic and PCB diagrams

This is a automatic battery charger, after completing the charge it turns off automatically. It runs on AC power but you can also run it with DC power. Its not my idea or my invention, I got it from net. After understanding the circuit I built it and it works fine. So try to built [...]

One very important Part of a Tube Amplifier is the Power Supply. It is crucial for the quality of the whole system. Especially beginners encounter problems like Hum or Drift that can become quite annoying. But resue is ahead: The following circuit uses a modern Mosfet to deliver a stable and virtually Hum-free voltage to [...]

This mini-project is the main power-supply for the Valve Crunch/Tremelo floor pedal presented elsewhere on Connectable  site. Since the PSU is a separate unit, and may be of use elsewhere I decided to document it apart from the pedal. The unit expects a 12v input at X1 – this was a cheap wall-wart in the [...]

This is the USB controlled Atmega8 microcontroller based power supply. Starting with the Visual Basic and IOCOMP software. FT232RL for the USB connection. Source: Ben

The source has the following characteristics • Tension of entrance: 220VAC • Tension of exit: 0 to 25VDC with a current of 0 to 2.5A. • Precision of the regulation • Thickness: 1V/100mA • Fine: 100mv/3mA • Use of microcontroller PIC 16F877A of Microchip leaving available for the use 10 ports. • Adjustment by means [...]