PWM Arduino Fan Speed Controller

Intro: PWM Arduino Fan Speed Controller

Simple dual channel PWM Arduino fan speed controller shield
You can download the pcb an sch (made with expresspcb) from my website (download section): http://www.apcc.tk

STEP 1: Part List

Part list:

- 3.5cm x  6cm single sided PCB

- 2pcs BD139 Power transistor

- 2pcs N4001 diode

- 1pcs LTV 826  2 channel Optocoupler

- 2pcs 10K ohm resistor

- 2pcs 220 ohm 0.5w resistor

- 1pcs 1K ohm 0.5w resistor

- 1pcs 3mm Red LED

- 2pcs of 2 wire connector

- 2pcs JST 3-Pin Connector Plug

STEP 2: Testing PWM Arduino Fan Speed Controller

With this simple arduino shield also you can driver 3 watt power leds.
Read more about this project on my DIY web site: PWM Arduino

Comments

[Ozzie_G]

Nice little project, minor improvement would be appreciated.
I am sure the PCB works, but in your schematics some crossing lines DO and some DON'T connect.