search

OpenGammaProject / Open-Gamma-Detector

☢️👁️ Hardware for a hackable DIY gamma-ray spectrometer using a popular NaI(Tl) scintillator, SiPM and a Raspberry Pi Pico.
GNU General Public License v3.0
254 stars 35 forks source link

4x1 header vs 3x2 header for SiPM #13

Closed HazenBabcock closed 2 years ago

HazenBabcock commented 2 years ago

Thank you for the fascinating project.

I have a question about the SiPM mount. The PCB of this project provides a connection for a 4x1 header to mount the SiPM. The apparent companion project SiPM-Carrier-Board has a 3x2 header. Is there something I don't understand about how these are supposed to work together? Or these projects are not actually related?

If they are not related would you recommend including the additional VCC filtering that the SiPM-Carrier-Board provides? Or is the filtering that is already part of the PCB of this project sufficient?

NuclearPhoenixx commented 2 years ago

Hello there,

thank you for the issue! After uploading all the new detector files I apparently forgot to also update the carrier board. Will fix the pinout as soon as I can just to avoid misunderstandings. However, with the new board I don't really recommend using the pin headers anymore. Just soldering wires directly to the pads is better as the pin connections proved to be very unstable.

By the way, the VCC filtering on the detector board should be enough if you keep all the connections as short as possible. However, if you want to be on the safe side then the better filtering directly on the carrier board is obviously better. It's not really that much about keeping the noise from the power supply down, but more about induced noise to the connection cables and stray inductance+capacitance.

NuclearPhoenixx commented 2 years ago

Just uploaded the new carrier board PCB files (see e91c1b5157467a477cd668f4f80a455605af84f8 in SiPM-Carrier-Board). Like I said, the header is optional, but it's got the same pinout now too so you can plug it in if you use a male and a female header.