Posted 26 Days Ago Job ID: 2089111 26 quotes received

Develop PCB

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  Send before: July 19, 2024

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Engineering & Architecture Engineering (Mechanical / Chemical / Civil / Electrical)

We need extension PCB for RPI 4.

The key features are:

  • Both sides of the PCB can be used for components during design
  • 4x RS232 outputs
  • 1x RS485 (can share a channel with one of the existing RS232)
  • ANALOG inputs (analog inputs configurable (with jumpers):
    1. 16-bit inputs using another ADC chip
    2. 2 x PT100 (PT1000) (2, 3, 4-wire connect)
    3. 8  x 16-bit channels (or 4 differential) configurable as voltage or current
    4. 4 x 12-bit channels configurable as voltage or current
  • If there are not enough general GPIO pins, they can be expanded with shift registers.
  • There should be separate modem board (attachable to main board) which should have SIM7070G module + Iridium satellite modem:
    1. Each modem uses its own UART line.
    2. RPI can turn each modem on/off individually.
    3. It must also include a GPS output (antenna).
  • The SD card .


The board must provide power for itself and for the Raspberry PI board. The Raspberry PI requires a 5V input with a max current of 2A (pins 2 and 4 below). The Raspberry PI also has a 3.3V pin which is intended for output and not input, so if needed, this can be used for powering logic

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