- Supports 1 to 6 RX5808 nodes
- Board size is 97mmx87mm, with cut-outs for an XT60 & Raspberry Pi connectors
- The Raspberry Pi plugs directly into the PCB in a raspberry Pi 'hat' style, to keep things compact
- Instead of multiple Arduinos, the board uses a single STM32 processor on a 40 pin module, mounted on the PCB
- The STM32 firmware can be updated via the RotorHazard web GUI using the 'Update Nodes' button (in the 'System' section on the 'Settings' page)
- The same server and node source code supports both the 6 node STM32 and the (existing) multi-Arduino boards
- Supports power / battery monitoring and a buzzer (low-battery alarm)
- INA219 (Current sense IC) & DS3231 (Real Time Clock) + RTC battery can be mounted directly to the PCB
- Connector pads for LED-strips & dedicated regulator
- Fans can be automatically switched on based on raspberry pi temperature.
PCB build instructions can be found here
PCB:
The cost of the required parts is approximately £74 (~102.60 USD)
For each node add £6, so all 6 nodes would add £36 (~49.90 USD)
All the optional parts add approximately £23 (~31.90 USD)
To fit all parts to the board will cost approximately £133 (~184.40 USD)
Note: The above costs includes the raspberry pi 3b + SD card. Mouser & Banggood were used in the above costings, parts may be cheaper from other suppliers
The PDF version of the BOM can be found here, the PDF version contains more information and suggested parts / suppliers
For the PCB:
| Reference | Quantity | Part No. | Notes |
|---|---|---|---|
| PCB | 1 | Download the gerber files | You can upload the gerbers files to your favourite PCB supplier or click here to buy from PCBway Keep default options but consider changing: - The solder mask colour - Select quantity 10 which doesn't cost any more |
| P12 | 1 | 2.54mm 20x2 8.51mm tall header | Single strips also work |
| P1 | 1 | XT60 Male | - |
| R2, R7, R8, R9, R11, R12, R13 | 7 | 100k ohm 5% 0805 resistor | Buy some extra in case you drop one |
| R3, R10 | 2 | 10k ohm 5% 0805 resistor | Buy some extra in case you drop one |
| U2, U3 | 2 | MP1584 | - |
| U2, U3 | 16 | 2.54mm header pins | - |
| U6 | 1 | STM32F103C8T6 | - |
| RX1, RX2, RX3, RX4, RX5, RX6 | 1-6 | RX5808 | 1 of these is required for each node you wish to fit |
For the timer assembly:
| Name | Quantity | Notes |
|---|---|---|
| RASPBERRYPI_3B+ | 1 | Alternative: Raspberry Pi 4 |
| 8GB+ Micro SD card | 1 | Any Micro SD card between 8GB and 64GB will work |
You will also require some 3D printed parts for the case and the 11.5mm 3D printed stand offs. If you wish to use a different case then 12mm standoffs should work.
Details on 3D printed parts and mechanical assembly can be found here
For the PCB:
| Reference | Quantity | Part No. | Notes |
|---|---|---|---|
| U5 | 1 | DS3231SN | Fit if you want the real time clock (RTC), alternatives: DS3231S#T&R, DS3231SN#, DS3231S# |
| BT1 | 1 | Keystone Electronics 1069 | Fit if you want the real time clock (RTC) |
| BT1 | 1 | CR1632 battery | Fit if you want the real time clock (RTC), alternatives: CR1620, CR1616 |
| R1 | 1 | 0.1 ohm 2512 1% resistor | Fit if you wish to use the current sense IC |
| U1 | 1 | INA219AIDR | Fit if you wish to use the current sense IC, alternatives: INA219AID, INA219BID, INA219BIDR |
| C1, C2 | 2 | 100nF X7R 0805 capacitor | These are decoupling capacitors for INA219 and DS3231 |
| D1, D3 | 2 | 0805 LED | Fit if you want the on-board power and status LED's, not really needed |
| R6, R29 | 2 | 220 ohm 5% 0805 resistor | Fit if you want the on-board power and status LED's, not really needed |
| P4 | 1 | 3 pin JST SM Female | Fit if you want to use RGB LED rope / tape |
| U4 | 8 | 2.54mm header pins | Fit if you want to use RGB LED rope / tape |
| U4 | 1 | MP1584 | Fit if you want to use RGB LED rope / tape |
| BZ1 | 1 | 12mm x 9.5mm 5V buzzer | Used for low voltage alarm |
| Q2 | 1 | GSD SOT-23 N-Channel MOSFET | Used for optional fan enable control, an example is IRLML6344TRPBF |
For the timer assembly:
| Name | Quantity | Notes |
|---|---|---|
| Raspberry Pi heat syncs | 1 set | Recommended to keep the pi cool |
| 20x20x6mm heat sync | 1-6 | Recommended to keep the RX5808's cool |
| Thermal glue | 1 tube | Needed to attach the RX5808 heat syncs |
| LCD Voltage Screen | 1 | Used to show the battery voltage on the case |
- Soldering iron (chisel tip recommended to fit INA219 or DS3231 IC's)
- Solder
- Tweezers
- Digital Multi Meter (DMM), to measure voltage and resistance
- Screw driver for screws purchased
- Small flat head screw driver to adjust MP1584 voltage
- Wire cutters / side cutters
- Helping hands
- Solder wick
- Hot glue & glue gun
- Pilers
- Insulation tape
- Copper tape with conductive adhesive
- Magnifying glass
RotorHazard 6 Node STM32 Schematic
Gerber files for RotorHazard 6 Node STM32 PCB