White LED Head Lamp - A white LED head lamp which can operate with only two AA batteries. The LEDs are driven in constant current, so that the brightness is maintained until end of battery life. __ Designed by The Electronic Lives Manufacturing-presented Chan Windmill DIY Analog MPPT (maximum power point tracker) - I would like to share the design of my Windmill maximum power point tracking (MPPT) circuit in enough detail so someone with some electronics experience could make it for their windmill. I am pleased with the performance, so far
Wiper Speed Control - A continuously working wiper in a car may prove to be a nuisance, especially when it is not raining heavily. By using the circuit described here one can vary sweeping rate of the wiper from once a second to once in ten seconds
Wireless RF PWM Dual Motor Controller - This is a very simple Wireless RF transmitter circuit that consists of the Holtek HT-12E encoder chip and AM 418MHZ-transmitter module (WZ-X01, other similar device can be used) . Using the hybrid RF xmit/receive modules make building the RF remote control a lot easy __ Contact: info @ wzmicro.com
Wireless Stepper Motor Controllers - Here is a low-cost and simple wireless stepper motor controller using infrared signals. Using this circuit you can control the stepper motor from a distance of up to four metres. The circuit...__ Electronics Projects for You
Working with Stepper Motors - We've all experimented with small "hobby motors", or free-spinning DC motors.
Stepper motor driver that will allow you to precisely control a
unipolar stepper motor through your computer's parallel port.
With a stepper motor you can build a lot of interesting gadgets
such as robots, elevator, PCB drilling mill, camera panning
system, automatic fish feeder, etc. If you have never worked
with stepper motors before you will surely have a lot of fun
with this project.
Zener-based - Type 1 (Voltage Controlled) Solar Engine - This design uses a Zener diode to determine the voltage trip level. Simple variants of this design use LEDs or plain old diodes in series to accomplish the same thing. __ Designed by Wilf Rigter
Zener-based solar engine - Voltage-Controlled Solar Engine:This design uses a Zener diode to determine the voltage trip level. Simple variants of this design use LEDs or plain old diodes in series to accomplish the same thing. __ Designed by Wilf Rigter and Eric Seale
Zoelen Bridge Z-Bridge - A Cheaper H-Bridge Design the Zoelen Bridge (Z-Bridge) __ Designed by Wilf Rigter |