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  • Access SD Cards from the PSoC

  • I'm going to create a stand-alone PSoC project to use the PSoC to read SD cards. I'm going to start with the hardware defines for this project (which should leave the Z80 hardware pins unmolested) and just not download code. For the software piece, I...
  • Rewrite code with FastLED + Gamma Correction

  • Today, i rewrite a code of ambient light of arduino module applied FastLED library carefully. Why? there are 3 important thing, 1) the legacy code of adalight is based on SPI that is used by a RF module too. I think move pin in code of adalight from...
  • The Case of Cases

  • See Update BelowContext being more that of the puzzle of cases not one case "to rule them all," but I digress. The past week I've been going through a few catalogs to find an enclosure for D-DAQ's mainboard. Previously, the PCB's form factor was based...
  • From XOR to MUX

  • You might remember my musings with the XOR gate with interlocked NPN transistors discussed at Bipolar XOR gate with only 2 transistors But thinking about how XOR is done with pass transistors in CMOS and the structure often creates a MUX, I wondered...
  • My own try at a RingO9 with 2N2369A

  • Edit: See also More 2369, with more caps !With a sporadic and limited access to the workshop (at last !) I can finally try new ideas ! I have meanwhile received 9K PMBT2369 in SMD but I decided to use the old stock of 50pc 2N2369A in metal can, that...
  • ROP2 with Falstad

  • Note: this log is obsoleted by BitsliceAfter the last log Adder with Falstad, I also converted the ROP2 bitslice to the interactive simulator : There is still the challenge to disable the output of the CLA so it can be combined by ORs with the rest...
  • Topology (1)

  • In this post I want to share how I selected a suitable topology for the resistor network that will be the core of the programmable decade resistor. Although I did some online “research”, the following criteria determined my choices: Switch...