• Two Pushbutton Motor Controller
  Two small pushbutton switches, a few diodes and two relays form a method to control on/off power to a brush motor as well as the motor direction.  The circuit was originally designed for a motorized lifting platform.

Ultra Low Power LCD Indicator - (electronic design added 6/07)

Ultra-Bright LED Lamp - (circuit / schematic design added 6/06)

Ultrasonic Remote Control and Alarm - (circuit / schematic design added 6/06)

Uninterruptible Power Supply - (application / block diagram added 6/07)  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....

Universal Infrared Controller for a PC - This simple circuit allows you to record any Infrared remote control signal on your PC, and then play it back. This is particularly useful if you want to control appliances such as TVs, VCRs, CDs etc. from your computer. The device simply connects to the parallel port of your PC....This circuit was originally published in Electronics Australia, September1998  (added 4/02)

Universal Motor Drive - (application / block diagram added 6/07)

Universal RC5/RC6 Transceiver with PIC16F628 - This project is an expansion from another project from this website. On the one side you can read the RC5, RC5X and RC6 codes from remote controls on a LCD and on the other hand you can send all thinkable RC5, RC5X and RC6 codes to a device. Besides is for this project a PCB layout drew to make it still more easier for you. ….(electronic schematic added 11/08)

Use a switching regulator controller to generate fast pulses - 04/13/06, EDN-Design Ideas:  Switching-regulator-controller ICs can deliver gate-drive pulses with rise and fall times of less than 2 nsec, making them ideal candidates for laboratory pulse-generators.....(design idea added 10/06)

Using a Light Dimmer IC for AC Motor Speed Control - This circuit example uses LS7231 Light Dimmer IC (added 6/06)

Using CAN Networking for Cost Effective DC Motor Control in Vehicle Body Electronics - National Semiconductor Application Note  (app note added 6/06)

Using COP800 Devices to Control DC Stepper Motors - National Semiconductor Application Note  (app note added 2/06)

Using the AD2S80 Series Resolver-to-Digital Converters as Control Transformers - AN-203 Analog Devices Application Notes  (app note added 6/06)

Using the AD7877 Touch Screen Controller and the Intel PXA250 Processor Under Windows CE.NET - AN-738 Analog Devices Application Notes  (app note added 2/06)

Using the ADT7461 as a Multichannel Temperature Sensor - AN-702 Analog Devices Application Note  (app note added 2/06)

Using the DSPIC30F for Sensorless BLDC Control - Microchip Application Note Published 27-Jun-05  (app note added 6/06)

Using the LMX5001 Bluetooth Link Controller - National Semiconductor Application Note  (app note added 2/06)

Using the ML4425/ML4426 BLDC Motor Controllers / AN-42004 - Fairchild Application Notes / (app note added 6/06)

Using the Noise Reduction Feature on the AD7877 - AN-766 Analog Devices Application Notes  (app note added 2/06)

Using the PIC18f2431 for Sensorless BLDC Motor Control - Microchip Application Note Published 7-Feb-05  (app note added 2/06)

V/F AC Motor Drive - (application / block diagram added 6/07)

Vector Drive - (application / block diagram added 6/07)

VF Control of 3-Phase Induction Motor using Space Vector Modulation - Microchip Application Note Published 14-Mar-05  (app note added 2/06)

Voltage clamp circuits for ultra-low-voltage apps - Today's electronic systems often ... made to simulate a low-power Zener shunt regulator, using two parallel- .... The precise, ultra-low gate threshold voltage is used to control the sharp, fast ....(circuit / schematic added 09/08)

Voltage controllable LFO - This voltage-controlled LFO is based on the PIC 16F684, which is a pretty basic chip. Nonetheless, this LFO has more features than your average LFO. For a start, it can produce 7 basic waveforms, and also includes a noise source. It can also morph its waveforms under CV control, well beyond basic PWM....(added circuit 07/07)

Voltage-Based Controller for Switches - (electronic Circuit / Schematic added 10/04)

Volume Control - This circuit could be used for replacing your manual volume control in a stereo amplifier. In this circuit, push-to-on switch S1 controls the forward (volume increase) operation of both channels while a similar switch S2 controls…(circuit added 6/07)

Volume Control (Aaron Cake) - based on DS1669 Digital Pot IC (added 8/03)

Volume Control has Log Taper - 04/11/02, EDN-Design Ideas:  Digital potentiometers provide a compact and convenient way to attenuate audio-amplifier signals. However, most such potentiometers suffer from at least one flaw: a nonlogarithmic step increment. To avoid this problem, a user must usually step the potentiometer in a nonlinear sequence to simulate a logarithmic taper.....(design idea added 1/05)

Volume-Control - Circuit of a digital volume control using six discrete ICs, including a 5V regulator, is presented. IC1 (555) is configured to function as astable flip-flop. Its frequency or period may be adjusted by proper choice of resistors R44, R45 and capacitor C6 combination. Here it is for 0.3 second period.….(circuit design added 08/08)