2018-11-25
Long story made short, time has been scarce lately. School is sucking up most of my free time. BRCC math department stays true to its two principles: A) math was hard for me to learn and so it should be hard for you to learn and B) the championing of rote memorization over anything else. There’s an expectation of the the suckers students to memorize trig tables. Just mind-blowingly idiotic. On to positive things. I Read more…
2018-09-01
One of the current and hopefully last hardware niggles is the unexpected value on the last analog input. It’s consistently reading millivolts higher than the other analog inputs. This has been verified with and without a device attached to it. The analog input in question is ICD4. Because I took a thing naming class at a community college, you can be absolutely clear that this is the fourth ICD input. When nothing is connected to Read more…
2018-08-25
Note: This post a bit of a mess because I kept screwing up and being wrong. I am going to leave it this way because I don’t want to have yet another ‘highlight reel’ of an Internet presence. Learning is a messy endeavor, especially when you’re not some brillient mind that “just gets it”. The impetus behind the last revision of the board was current. Specifically current handling. More specifically issues with current handling. Even Read more…
2017-07-18
So many failures, so little time More failures. Apparently the driver IC I chose to drive the digital outputs is an N-channel driver. Naturally I had it trying to switch +24V. I know what you’re saying: hey Vic, you stupid, you’ll need a charge pump in order to bring the gate voltage above the source voltage. I did not have nor am I willing to incorporate a charge pump. Another failure was failing to properly Read more…
2017-02-17
This update has been a while in the making. Between the last update and this one I accidental adopted a dog. That little shit machine has been a time sink. The Hardware Portion So anyways, the previous objective was to interface the NASA quality 4-20mA current loop simulator with the BBB. Several related and unrelated issues had to be address A bit tangential, but the GPIO pins are high when the BBB is first turned Read more…