Breadboard

A single PWM fan and single sensor is connected to a Teensy 3.2 using a breadboard.

Hardware Requirements

1. One Breadboard

2. One Teensy 3.x with headers (previously flashed with Teensy Fan Controller)

3. A Micro USB cable

4. One 10k thermistor (fe. Adafruit 10K Precision Epoxy Thermistor - 3950 NTC)

5. One 10k Ohm resistor (ideally 1% or better accuracy)

6. One standard/rectifier diode (fe. 1N4004)

7. One 12v power supply (up to 15V should be OK)

8. One PWM PC fan (80mm, 120mm, 140mm)

9. Wires

Hardware Setup

Steps to set up a breadboard with a Teensy 3.2, a single fan, a single temperature sensor, and a 12v power supply:

1. Place the Teensy into the top end of the breadboard (Teensy GND on breadboard row 1)

2. Place a 10k Ohm resistor between Teensy AREF (breadboard I4) and Teensy A5 (breadboard I8)

3. Place a diode with anode at Teensy D5 (breadboard A6) and cathode at breadboard row 22 (use a wire if needed)

4. Connect Teensy GND (breadboard A1) to the GND bus on the left side of the breadboard

5. Connect Teensy AREF (breadboard H3) to Teensy V3.3 (breadboard H4)

6. Connect fan (4pin PWM):

   1. Connect fan pin 1 (GND) to the GND bus on the left side of the breadboard

   2. Connect fan pin 2 (12V) to the PWR bus on the left side of the breadboard

   3. Connect fan pin 3 (RPM) to breadboard row 22 (cathode side of diode)

   4. Connect fan pin 4 (PWM) to Teensy D4 (breadboard A6)

7. Connect thermistor:

   1. Connect thermistor pin 1 to Teensy A5 (breadboard J8)

   2. Connect thermistor pin 2 to Teensy AGND (breadboard J2)

8. Connect 12v power supply the left breadboard bus:

   1. Connect power supply GND to the GND bus on the left side of the breadboard

   2. Connect power supply +12V to the PWR bus on the left side of the breadboard

Software Setup

Note the Teensy connections made in the previous section:

Signal	Teensy Pin
Fan 1 RPM pin	D5 (pin 5)
Fan 1 PWM pin	D4 (pin 4)
Thermistor pin 1	A5 (pin 19)

Configure the software using the information given above:

1. Connect the Micro USB cable to the Teensy 3.x

2. Launch Teensy Fan Controller UI

3. Select Menu > Hardware Setup

4. Enter the following:

   Field	Value
   Water Supply Temp Sensor: Pin	19
   Water Return Temp Sensor: Pin	0
   Case Temp Sensor: Pin	0
   Aux1 Temp Sensor: Pin	0
   Aux2 Temp Sensor: Pin	0
   Fan 1: PWM Pin	4
   Fan 1: RPM Pin	5
   Fan 2: PWM Pin	0
   Fan 2: RPM Pin	0
   Fan 3: PWM Pin	0
   Fan 3: RPM Pin	0
   Fan 4: PWM Pin	0
   Fan 4: RPM Pin	0
   Fan 5: PWM Pin	0
   Fan 5: RPM Pin	0
   Fan 6: PWM Pin	0
   Fan 6: RPM Pin	0

5. Click Save

After making changes, the Hardware Setup screen should appear as: