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26 Results for "TTL computer"

  • The Diode Clock

  • The ClockThe clock is a six-digit HH:MM:SS timepiece using only DDL gates (1N4148/1N4007 diodes) for the logic and display functions (the LEDs are also diodes, of course). The power supplies and currently the crystal-oscillator timebase use more traditional...
  • Parts, parts, parts...

  • Circuit design is like speaking a language. You have vocabulary (parts) made of letters (transistors and gates), grammar (how a few parts interact to provide a macrofunction), sentences, paragraphs... The semantic is what the whole is meant to do. In...
  • We have data! 19200bps!

  • heh... but only if I transmit only two bytes per second. And it also doesn't handle low baudrates well, which makes absolutely no sense in the software. I'm at quite a loss. Latest theory may have to do with voltage levels... yeah, the blacklink either...
  • OBD, oh blah dah

  • Update 3-3-19: Probed. See the bottom. Update 3-2-19 at the bottom. In another weird coincidence, it would seem my van does not, in fact, use CAN-bus, but in fact uses SAE-J1850 PWM (ooh, cool copy-paste result! I'mma leave that.) So, what's the weird...
  • A data indexing exercise

  • History Back in 2002 I wanted to time-shift radio programs for later listening and also to listen in the car. Since a computer can automatically record at the appropriate times, this was the obvious choice of method. All I had to do was to connect up...
  • ARDUINO LCD+STONE HMI+MAX30100+DISPLAY HEART RATE

  • Arduino LCD display project brief introduction: Some time ago, I found a heart rate sensor module MAX30100. This module can collect blood oxygen and heart rate data of users, which is also simple and convenient to use. According to the data, I found...