4 layers159 × 130 mm
2 layers28 × 18 mm
RelayDriver
AgOpenGPS-Official/Rate_Control20- Size
- 28 × 18 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 22
- Pads
- 52
- Tracks, vias
- 129, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Jan 2024
- Updated
- 18 Jan 2026
Overview
RelayDriver is an open-source printed circuit board by AgOpenGPS-Official, from the AgOpenGPS-Official/Rate_Control repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 28 × 18 mm with 4 parts on 22 nets, routed with 129 tracks and 4 vias.
Its parts include 3 connectors and 1 IC.
README
README.mdNano RC12-3
- uses a Nano (with ENC28J60 Ethernet shield) & an on-board mounted Cytron for rate control
- 1 or 2 MD13S for rate control
- self assembled through-hole board, least expensive
- controls two rates
- can be connected to a relay module with a 20 pin cable or dupont connectors
- work switch
- pressure switch
- [OSHPARK](https://oshpark.com/shared_projects/UU8e90h9
Teensy 4.1 RC11-2
- uses a Teensy & an on-board mounted Cytron for rate control
- small components are surface mount parts
- Teensy Ethernet
- can control two rates and eight sections
- 8 relays (SPDT 12V output)
- (1) 5V or 12V analog (pressure) input, potentiometer adjustable filtering
- (2) optically isolated digital (rate/pulse) inputs (5V or 12V)
- 3.3V I2C headers (Qwiic)
- supports optional external RelayDriver5 I2C board
- work switch
- canbus
ESP32 RC15
- uses an ESP32 (optional W5500 Ethernet Module)
- mostly surface mount parts
- can control two rates and 7-14 sections
- (2) DRV8870 motor drivers with reversible outputs for rates
- (7) DRV8870 motor drivers for 7 reversible (motorized ball valve) outputs
- (4) 5V analog inputs (or 2 differential inputs)
- (2) optically isolated digital (rate/pulse) inputs, up to 12V
- RS485 chip & header
- 3.3V I2C header
- supports optional external RelayDriver5 I2C board
- supports optional external RelayDriver5 I2C board
RelayDriver5
- PCA9535 based I2C IO expander
- designed to plug into 8 or 16 channel relay board with Qwiic cable
Firmware
Parts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 | |
| 1 | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Vertical | J2 | |
| 1 | PCA9535PW,118 | MyFootprints:SOP65P640X110-24N | U1 |
| 1 | Qwiic | MyFootprints:Qwic_vertical | J1 |
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Questions
How big is the RelayDriver PCB?
It measures 28 × 18 mm and has 2 copper layers, 1.6 mm thick.
What parts does the RelayDriver use?
4 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the RelayDriver KiCad files?
From the AgOpenGPS-Official/Rate_Control repository on GitHub, at the commit this page was made from: the board is RelayDriver5/RelayDriver.kicad_pcb and its schematic ESP32/RC15/Analog.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RelayDriver design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).