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  • Q: How to make my LED cube brighter?

  • I hope this is the right place to post this. I'm building an 8x8x8 single color LED cube. I've built test circuits on a breadboard and it works. However, I'm disappointed that the LEDs are much dimmer than when they're not multiplexed. It makes sense...
  • What's the value of this historic computer stuff?

  • Hi there,A friend of mine recently passed away and his wife has put me in charge of selling some of his historic computer stuff. The problem is I have no idea what it's worth. Can you help me?There's an HP 85 with the owners manual, 4 linking cables,...
  • Advices/infos about USB-connected

  • Hello all,I just received a couple of USB-capable devices (merci eBay !) and I'm trying to make them talk to my Linux-based computer.Mastech MS8250D : a good-looking handheld multimeter (I needed to replace my 15yo Wavetek)1254400.843474] usb 2-1.2:...
  • What do you think of this weird ALU Design?

  • http://www.6502.org/users/dieter/a4/a4_7.htmWhat are advantages/disadavantages of this weird design?Is this the way to get the most functionality per logic gate out of an 1 bit slice CPU? And are there limitations with this design if I want to use it...
  • Quarantine/Embargo of new projects and users

  • Hello dear  community,As the question of spam is trending again, I have thought about reasonable, fair and efficient measures that the HaD team could implement quickly to reduce the annoyance.One modest proposal is embargoing projects of new users...
  • Need 64 pwm outputs that can source 25ma

  • I'm thinking of re-doing the electronics to an old shift-register based 8x8x8 LED cube (uses 5v LEDs). I want to instead do fast pwm in hardware.Unfortunately its built with the layers being common anode. So I need 64 individual pwm outputs which...
  • Simple Video Camera Modules

  • Does anyone sell a hobby friendly module that uses those small older mobile phone quality sensors and with a controller board that encompasses the decoding / recording to microSD / control buttons / LiPo charger? I've re-purposed the ones that come in...
  • Tales From HelpDesk

  • [‎3/‎14/‎2016 1:05 PM] Admin : Good Afternoon UserHelpDesk told me you were having some trouble updating Citrix Receiver.[‎3/‎14/‎2016 1:06 PM] User : Helloyes[‎3/‎14/‎2016 1:06...
  • Depression: things you can try

  • (Duplicate of a HAD blog post, placed here for posterity.) Here's some things to try that might help depression. Firstly: there's a direct correlation between poor sleep and depression, but no one knows whether depression causes sleep disturbance or...