The Simplest MOSFET On/Off Switch
A touch sensitive on/off switch can be made with a single MOSFET. The following schematics illustrate such a switch using only a power MOSFET (IRFZ22). In this example, the switching capability is...
View ArticleAn Isolated MOSFET Serial Port Relay Controller
Using DTR (data terminal ready) and RTS (request to send) pins of a PC serial port (RS-232) without actually using the serial data pins, we can interface at least two relay devices with a computer....
View ArticleA Parallel Port Stepper Motor Driver With Discrete Components
Using PC’s parallel port is a convenient way to control a stepper motor. For unipolar stepper motors, up to two motors can be controlled with the 8bit data line. The standard way of connecting a...
View ArticleA Power Inverter with Arduino Pulse Source
After going through some of the tutorials on Arduino’s site, I really started to appreciate what a powerful platform Arduino really is. A lot of seemingly complex software/hardware interactions can be...
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