Dual complementary opto-isolator dcoi high side mosfet driver #3
The PC817C opto-isolators have fairly slow rise and fall times, but they operate in this circuit very much as the…
Arduino pwm tutorial #2 – how to set pwm frequency accurately
You can set the Arduino's PWM frequency with great accuracy by using this library. Links: http://forum.arduino.cc/index.php?topic=117425.0 https://code.google.com/p/arduino-pwm-frequency-library/
Dual complementary opto-isolator dcoi high side mosfet driver #2
Here's a simple dual opto-isolator driver for an N-channel MOSFET on the high side of the load. A very simple…
Dual complementary opto-isolator dcoi high side mosfet driver #1
Here's a simple dual opto-isolator driver for an N-channel MOSFET on the high side of the load. A very simple…
Arduino pwm tutorial #1 – how to change pwm frequency
The Arduino has a fixed PWM frequency of 490Hz - or does it? On digital pins 3, 9, 10 and…
High power led tutorial #2 – how to drive 5w 10w cob leds from 12v
These 5W and 10W COB LEDS are made up of 1W LEDs in a matrix. I'm using a purpose made…
High power led tutorial #1 – how to drive 1w and 3w leds from 12 volts
High power LEDs differ from regular LEDs in a number of respects. Firstly, current regulation using resistors is impractical so…