#garfield Logs

Jun 21 2025

02:53 AM rue_mohr: yea, it got worse
07:48 AM aandrew: rue_mohr: no comments on the laser module thing you asked that I document?
04:08 PM rue_mohr: oh! the laser distance finder
04:11 PM rue_mohr: aandrew, so, is that serial from the laser module itself or from the board with the screen?
04:13 PM rue_mohr: sweet.
04:20 PM aandrew: rue_mohr: that's the protocol between the board with the screen and the laser distance finder
04:20 PM rue_mohr: ah!
04:21 PM rue_mohr: so, I wonder if the screen would take bogus data to use it as a display
04:21 PM rue_mohr: 7 segment tho
04:26 PM aandrew: yep it would, absolutely. and yes, 7 seg only
04:27 PM aandrew: it's got 5 digits of integer meters and three of fractional, I wonder if the display board would honestly do the right thing with a km
04:28 PM aandrew: sorry, 100km
04:58 PM rue_mohr: ok, so, I had good success with a high voltage royer
05:01 PM aandrew: I saw that on twitter: pair of transistrs, a few Rs and Cs and a transformer primary: 10mA idle current?
05:01 PM rue_mohr: yea
05:02 PM rue_mohr: the old article I was reading yesterday said that efficiency with that sort of design is hard because of the base resistor losses
05:11 PM aandrew: would it work better with mosfets?
06:07 PM rue_shop2: no!
06:07 PM rue_shop2: the bipolar transistors have a current limit, based on their drive current, and thats super important for switching