- esp8266 (D1 Mini for example )
- relay (required to turn off fan)
- PWM (4 PIN) Fan
- 12v power supply
| 12v PS | ESP | Relay | FAN |
|---|---|---|---|
| 5v | Relay DC + | ||
| GND | Relay DC - | ||
| D1 | Relay Data In | ||
| 12V | IN | ||
| OUT | 12v (red) | ||
| GND | GND (black) | ||
| D3 | Tach (yellow) | ||
| D4 | PWM (blue) |
You can use a 12v to 5v Mini USB to power the D1 Mini and the fans at the same time
You can control more that one fan with one system using somthing like this
Take into consideration the number of fans that the power supply will feed!
Use this values only as reference, always consult your fan specs:
| fan | rpm | watt | amp |
|---|---|---|---|
| 80 mm | 2000 rpm | 1.8 w | 0.15 Amp |
| 120 mm | 2000 rpm | 6 w | 0.5 Amp |