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  • 162 x Power Supplies

    Browse through a total of 162 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  

    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”...
    LM5008 High Voltage Switching Regulator What do you do when your maximum input voltage = 90V and /or linear regulator has unreasonable power dissipation? First, here are a few specifications to digest for a 24V @ 70°C ambient application: Device Input voltage rating *Power rating Heatsink Imax @ Vmax ua7824 40V 13W 3°C/W 810mA LM317 24 + 35V = 59V 10W 3°C/W 285mA...
    Regenerating Alkaline Batteries We regenerate these type of alkaline batteries here: http://en.wikipedia.org/wiki/Alkaline_battery (not normal rechargable ones…) The Schematic The schematic is rather trivial. A voltage regulator brings down a supply voltage (which might be from a car battery) to 5V. An additional built-up voltage regulator generates an...
    Balancing Ni-MH Battery Packs There are still a lot of hand-held tools in use with Ni-Cd or Ni-MH batteries. The simple charger has no switch-off criteria, and you need to measure and adjust the charge time, else you will badly overcharge the batteries. Or you need to add some charge electronics. The battery pack life is limited because of overcharging, of...
    XL6009 12V Universal Charger for Laptop/Notebook I recently failed to resist buying a compact power module from eBay for almost nothing! As usual, thereafter I leaped into the inside electronics of the module, and really amazed by the hidden magic power of that little board. Yes, a simple but highly useful dc-dc boost converter block, literally, suitable for unlimited...
    Robot Battery Meter Often, simple robotics projects are powered from a small power bank consists of common dry cells (1.5Vx4=6V) or Lithium-Polymer cells (2S LiPo=7.2V). Ofcourse, the 5V required for the microcontroller and related circuits is derived from this input supply using a low-drop linear fixed voltage regulator like LM1117-5. Here is a...
    TP4056 LiPo Battery Charger For RC Toys Lithium Polymer (LiPo) battery is a type of rechargeable battery that provides high energy storage to weight ratios in an eternal variety of shapes and sizes. LiPo batteries has taken the electric RC gizmos world by storm,especially for Radio-Controlled (RC) toys like electric helicopters, airplanes and boats. Unlike...
    Low-loss Car Battery Charger Low-loss car battery charger presented here can be used for a lead-acid battery with liquid acid, typical size 12V / 50-80Ah. How it works The basic charge is performed by a transformer and rectifier without any control through transistors or thyristors. You can accept any current from ca 4 to 6 A. The direct charge is very...