Warning
OhmPi is a participative project open to all, it requires skills in electronics and to respect the safety rules. OhmPi must be assembled in a professional context and by people competent in electronics. The OhmPi team cannot be held responsible for any material or human damage which would be associated with the use or the assembly of OHMPI. The OhmPi team cannot be held responsible if the equipment does not work after assembly.
Build your Ohmpi
In previous sections, we described the various components that compose Ohmpi. Today, version 1.0x is no longer maintained, but all boards from v2023 upwards are compatible with each other. This is the major innovation of 2024. Depending on your needs and applications, you can choose the board you are going to use.
Recommanded configurations
Applications |
Measurement Board |
Mux |
Raspberry Pi |
Power supply |
Config file name |
4 electrodes-soil sample laboratory (only Rhoa) |
mb v2023 |
None |
Raspberry Pi 3 Model B |
12V Battery |
|
4 electrodes soil sample laboratory (Rhoa and IP) |
mb v2024 |
None |
Raspberry Pi 3 Model B |
12V Battery |
|
4 electrodes concrete sample Laboratory (Rhoa and IP) |
mb v2024 |
None |
Raspberry Pi 3 Model B |
DPS5005 |
|
Less than 32 electrodes for laboratory monitoring |
mb v2024 |
Mux v2024 |
Raspberry Pi 4 Model B |
12V Battery |
|
Less than 32 electrodes for field monitoring |
mb v2024 |
Mux v2024 |
Raspberry Pi 4 Model B |
DSP5005 |
|
more than 64 electrodes for field monitoring |
mb v2024 |
Mux v2023 |
Raspberry Pi 4 Model B |
DPS5005 |
Another possible combination is to use MUX v2023 with MUX v2024 together.
Examples of OHMPI assembly in different versions.