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  • 169 x Power Supplies

    Browse through a total of 169 power supply circuits. Great collection of power supply and PSU projects: battery chargers, regulators, solar power supplies.

    DC to DC converters   battery chargers   battery indicators   battery monitors   variable power supplies   voltage and power inverters   voltage converters   voltage regulators  

    uC 5V Power Supply Voltage Monitoring This circuit is a very simple voltage monitoring device for +5V VCC supply lines. It can be used to monitor the power supply of a microcontroller (uC) by indicating when the supply level raises above a pre-defined value. The output of the circuit can interface directly to digital logic, reset the microcontroller or turn off...
    Precision MicroController Power Supply Unit Lots of projects use the microcontroller (uC) as the ‘brain’ – for example as an intelligent controller in the prototype of a flying machine. Although there are a number of solutions for powering a microcontroller-based system, each type has its advantages and disadvantages, and you need to choose the one that suits the...
    1.2V/1.5V Single Cell to 3.3V Boost Converter Sometimes I need a 3.3V power source but the only one that I have are the 1.2 volt rechargeable or the common 1.5V alkaline batteries therefore I’ve searched for some type of DC to DC boost converter that will step-up the 1.5V voltage to the 3.3V that is required for my project. After seaching the www I’ve found 2...
    One Battery to 3 Volts Step-up (Boost) Converter With the help of this simple circuit you will be able to convert any voltage between 0.9V and 1.6V to a fixed 3V voltage therefore it is very useful when you need to power equipments that require 3 volts but you have only a single 1.5V battery or a 1.2V rechargeable one. As you can see below the boost converter circuit uses...
    36V Battery Level Indicator This battery level indicator offers (5) LEDs that light up progressively as the battery voltage increases. This is a update of the 24V Battery Level Indicator. While designed for 36V systems, it is easily modified to 24V, 48V or 60V simply by changing two resistors. LED Color Charge Level Red: Power Connected (0%) (essentially...
    Hack the PC SMPS! Modern personal computers (PC) use well designed, rich capacity and reliable switch mode power supplies (SMPS), which ought to be ideal for regular use in electronics hobby labs as dependable bench-top lab power supplies. Since pc smps provide +3.3V, +5V, and +12V at high ampere (A) ratings as well as some low current negative...
    SCR 12V to 5V USB Converter SCRs are the switching devices for this unusual DC to DC converter that is suited for the ubiquitous 5V USB power source as well as numerous other applications. This novel power circuit topology uses an intermediate resonant link that facilitates self-commutation for both SCRs – while SCRs are easy to turn on, they tend...
    USB Car Charger with LM2596 This usb car charger was designed with the aim of providing an onboard usb power outlet for charging/running portable usb devices. This circuit is an improved version of the usb power socket circuit published years ago in Electronics For You. At the time, this was designed around a step-down linear regulator chip. The aim of...
    SCR (Reverse Blocking Thyristors) DC to DC Converter Two series SCRs (reverse blocking thyristors) are unlikely switching devices for this DC to DC converter. This topology has an intermediate resonant link that facilitates self-commutation of each of the SCRs. Both input and output currents are discontinuous thus requiring appropriately sized low impedance capacitors. The...
    PFM Module – Circuit Surgery Today, it is very easy to build our dream projects within the stipulated time, because almost all supporting components & circuits are readily available in pre-wired and compact modules. A short tour through ebay (or amazon) will bring the items at our doorstep within days. “DC to DC Converter Step Up 1.5 Volt to 5 Volt”...