Making a BPM was a fun little project…
I made a Fritzing part but, after trying out various brands, including my own (made with OP-Amp, IR sender & receiver LED’s), I settled for a TooGoo brand (about $3) and, as usual, I simply use a contact pin part (3-pins) as I don’t bother with silkscreens or Breadboard prettyness…
It’s been a couple of years and I kissed the Part files goodbye during computer cleaning…
Below images show:
TooGoo with TFT and INK displays (I use the INK version regularly and it’s deadly accurate 50 to 52 always compares well with actual Medical device). The TFT doesn’t refresh fast enough to suit my preference and finger-sensetivity isn’t yet dialed-in…
For the Homemade one, I made a housing for the IR LED’s and made a housing for the TooGoo one, as well… on Mini-Breadboard
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