• Raspberry Pi is NOT Open Hardware.

    01/14/2021 at 21:36 • 0 comments

    Just a friendly reminder.

  • Hysteresis

    12/23/2020 at 01:35 • 1 comment

    Playing with Fasltad's circuitjs to create a slightly better hysteresis circuit than the default circuit. It's crazy because changing any value affects the rest of the circuit.

    The main difference is the feedback resistor, and a better choice of resistor values.

    I tried to reduce the current draw and increase the hysteresis, which keeping convenient resistor values and decent logic levels (at least the low level is < Vbe at 3.3V).

    That's if for today :-)

  • Thank you Jaromir !

    01/28/2020 at 23:36 • 2 comments

    I received these yummies thanks to @jaromir.sukuba and it's only a tiny, tiny small part of the treasures he sent me !

    Is it worrying that I now know half of these ridiculously obsolete parts ?

    anyway I have enough of these to build a clock.

    or two, maybe.

    or a UART.

    Damnit...