# 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](https://www.adafruit.com/product/372))
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

![Breadboard wiring diagram](/files/-M1T_5auTAI7XkKXuTOW) ![Schematic](/files/-M1T_5azoDAn7qb4W678)

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

[![Breadboard example](/files/-M1T7mvyV4H6DUBSROmM)](https://github.com/mstrthealias/TeensyFanController/tree/7f0e09745d2ca4eb187d464d92cf2506ab3e571e/doc/images/rcd.photo.png) [![Board example](/files/-M1SajOL8NA7Re7j_fNM)](https://github.com/mstrthealias/TeensyFanController/tree/7f0e09745d2ca4eb187d464d92cf2506ab3e571e/doc/images/rcd.board.png)

## 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**

{% hint style="info" %}
After making changes, the Hardware Setup screen should appear as:

![Breadboard - fan settings](/files/-M1T7mw1VCRxJ5vb1TY4)
{% endhint %}


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