
Rvm interface pcb
zk946190-ui/rvm-interface-pcb
KiCad schematic and PCB layout for an interface board that connects an Arduino Mega to the sensors, actuators and communication modules of a Reverse Vending Machine (RVM).

Main repository of the CitizenSensor project
RaspiConnectorBoard is an open-source printed circuit board by CitizenSensor, from the CitizenSensor/CitizenSensor repository on GitHub. It is a 2-layer board of 68.1 × 38.1 mm with 7 parts on 35 nets, routed with 63 tracks and 0 vias.
It is built around the HX711 and BC547. Its parts include 4 connectors, 1 resistor, 1 diode and 1 transistor.
The connector board is a small PCB that sits on top of the CitizenSensor Raspberry Pi HAT and connects additional components to the Raspberry Pi, namely:


| Item | Description | Amount | Comment |
|---|---|---|---|
| J0 | Raspberry Pi Connector | 1 | 40 pins |
| J1 | Pin Header 90° 1x4 | 1 | 2.54 mm raster |
| J2 | Pin Header 90° 1x5 | 1 | 2.54 mm raster |
| J3 | Pin Header 90° 1x2 | 1 | 2.54 mm raster |
| R1 | 1K resistor | 1 | |
| D1 | 1N4004 diode | 1 | |
| Q1 | BC547 | 1 |
| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1N4004 | Diode_THT:D_T-1_P10.16mm_Horizontal | D1 |
| 1 | BC547 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | HX711 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J1 |
| 1 | KY040 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Horizontal | J2 |
| 1 | MOTOR | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J3 |
| 1 | Raspberry_Pi_2_3 | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J0 |
It measures 68.1 × 38.1 mm and has 2 copper layers, 1.6 mm thick.
7 parts, built around the HX711 and BC547. 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.
From the CitizenSensor/CitizenSensor repository on GitHub, at the commit this page was made from: the board is 4_ConnectorBoard/RaspiConnectorBoard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask CitizenSensor before reusing the design.

zk946190-ui/rvm-interface-pcb
KiCad schematic and PCB layout for an interface board that connects an Arduino Mega to the sensors, actuators and communication modules of a Reverse Vending Machine (RVM).

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