Electronic Circuits and Tutorials
Electronics Schematics - U

Unijunction Transistor Circuits

Neuhaus SmartLine/Fenton PowerPal interface - ….(electronic schematic)

PICREF-1: Uninterruptible Power Supply - Microchip Application Note Published 28-Oct-05  (app note)

PowerCom King UPS cable - ….(design)

Small 12V UPS with U  feedback - (electronic circuit)

Tripp-lite OmniPro 675 UPS - ….(electronic schematic)

Tripp-lite OmniPro-450 (675) PowerAlert Cable - ….(design)

Tripp-lite OmniPro-450 (675) WinNT Cable - ….(circuit design)

Tripp-lite SmartPro Cable - ….(design)

Uninterruptable Power Supply (Andy Collinson) - 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 electrical supply line failure the battery takes over, with no spikes on the regulated supply....(electronic design)

Uninterruptible Power Supply - (application / block diagram) In common Off-line UPS, the power is derived directly from the power line and picked from the battery when the line fails. Then the battery powered inverter turns on to provide with the AC output. A battery charger....

UPS YUNTO P Series (250/500/750/1250) - ….(design)

Variable Power Supply Using Fixed Regulator - This is a similar power supply that I used to power my FM Transmitter. After suffering long problems with mains hum, this design using a pi filtered C-L-C approach. This circuit offers excellent ripple rejection...(electronic design)

An Alarm Power Supply With Battery Back-up - 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 of up to 1-amp. In the event of mains failure, the back-up battery takes over automatically. When the mains is restored, the battery recharges.  (circuit design)

APC Back Pro UPS cable - ….(circuit design)

APC Dumb UPS cable (simple) - ….(design)

APC Smart UPS cable - ….(circuit design)

APC Smart UPS interface Port - ….(electronic schematic)

Basic UPS - (electronic diagram)

Build a UPS for USB devices - 04/11/02 EDN-Design Ideas: Portable systems often include circuitry that derives power from an external source, such as USB. When  system disconnects from  USB supply, a battery takes over and supplies current via a dc/dc converter. A diode-OR connection (Figure 1)offers  easiest way to ensure that  supply voltage doesn't sag during this switchover to  battery.....(design idea)

Build a USB based GPIB Controller - 12/16/05 EDN-Design Ideas: Roll-your-own USB-based instrumentation bus.....(design idea)

Fiskars PowerRite UPS Port - ….(electronic schematic)

HP PowerWise L600/L900/L1250 UPS interface - ….(circuit design)

Invertomatic-Victron (IMV) UPS intelligent (serial communication) cable - ….(design)

Liebert UPStation-GXT interface - ….(design)

Minuteman UPS - ….(electronic schematic)

MOSFET Circuit Ups Regulator's Output Current - 02/01/96 EDN-Design Ideas - Use a current mirror and a power MOSFET to increase the output-current capability of an IC-voltage regulator….....(design idea)

Note: To report broken links or to submit your projects, tutorials please email to Webmaster