Large PCB Prototype Development
Budget: €750 – €1,500 EUR
I am in need of a skilled PCB developer to create a large prototype for me. This project will involve a combination of through-hole and surface-mount components.
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):
16-bit inputs using another ADC chip
2 x PT100 (PT1000) (2, 3, 4-wire connect)
8 x 16-bit channels (or 4 differential) configurable as voltage or current
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: https://www.iridium.com/products/iridium-9602/
Each modem uses its own UART line.
RPI can turn each modem on/off individually.
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
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):
16-bit inputs using another ADC chip
2 x PT100 (PT1000) (2, 3, 4-wire connect)
8 x 16-bit channels (or 4 differential) configurable as voltage or current
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: https://www.iridium.com/products/iridium-9602/
Each modem uses its own UART line.
RPI can turn each modem on/off individually.
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