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6024 Results for "keyboard"

  • New Bellows, New Seals
  • Log     from Concertina MIDI Controller
  • I slightly redesigned the bellows to eliminate most of the pasteboard at the hinge points -- both mountains and valleys -- to decrease the overall springiness. I also reworked the way the bellows attaches to the two keyboard assemblies and added a beeswax-filled...

  • On I/O
  • Log     from KZ80
  • The biggest challenge right now is I/O into the system. I'd eventually like to support KeyboardLCDSerial / UART for attaching modems and other such thingsCompact flash driveA Counter/Timer Circuit (CTC) Last night, I realised I could use a handful of...

  • The future of the KZ80
  • Log     from KZ80
  • News on the KZ80 front has been quiet, and for good reason: the new job hasn't given me the time I need to focus on it. Additionally, the cost of developing hard is pretty high so I need to find a way to do it more cheaply. I think the way I'm going...

  • Restoring the surface
  • Log     from Restoring the Palm Foleo
  • The Foleo used the soft-touch paint on its surface that Palm also used on their Treo 755p phone.  Unfortunately, this paint has the tendency to get very tacky and unpleasant to handle after years in storage, and all of my devices are suffering from...

  • JOYPAD
  • Log     from 3-Chip Z80 Design
  • I spent a lot of time in the last log getting interrupts to work with the MCP23017 parts. The goal was to get my new JOYPAD to simulate keypresses to the Z80. I got interrupts working on the PSoC and learned a lot about interrupt on the PSoC along...

  • USB Headers
  • Log     from MBF
  • This week the headers for the usb extensions arrived.  I went with common 2.54mm pitch double stack header pins.  I put 90 degree pins on the board and 2x 4 wire jumpers with 4 pin connectors carry the signal to the ports for the external USB. ...

  • Built first card
  • Log     from Not Quite Useless Raspberry Pi Replacement
  • I built up the first card. Downloaded a PSoC file which blinks the on-board LED. It worked. Board is running a USBUART program which loops back USB data and I was able to type on the keyboard and get it to come back to the Host PC. Testing Direct I/O...

  • My Space is Too Big
  • Log     from Flounder Keyboard
  • The PCBs arrived today! They look great:So of course I had to try and insert all the switches and keycaps to see how they fit. The fit is (intentionally) tight, as I made them a bit denser than on a normal keyboard, but they seem to all fit properly:With...

  • Prototype C
  • Log     from TonnetzOne - Isomorphic Midi Keyboard
  • Project resumes! A new set of test PCBs has been ordered - a 4x4 Velocity Switch matrix with breakaway panels.  As the PCB manufacturer (JLCPCB) only does multiples of 5, this one design will be used for 3 purposes.  The Three (identical) PCBs...

  • Get Pi running and install OpenMediaVault
  • Instructions     from Cheap-O-NAS
  • Follow the instructions in this excellent video which shows you how to install OMV on a Raspbian Buster Lite OS. I cannot emphasise enough the need to use a microSD card from a reputable source (e.g. physical shop). I have wasted hours on this project...

  • Core Panel Done
  • Log     from WDC-1 a "Working Digital Computer"
  • Here is the diagram from the book showing the "Core Memory" panel: From my log post Switch for the Core Panel I have opted to implement a slider switch to select the Core "Words". Here is my finished panel: The switches are wired much like a keyboard,...

  • Inchdigits reloaded
  • Log     from Inch digits
  • The original board works exactly as desired. This is not surprising as the circuit has been well tested by the many cheap displays using the same chip but have smaller digits. Even the higher forward voltage of 2 diode junctions per segment was taken...

  • Designing the new case...
  • Log     from Resto-Mod 8 bit microcomputer
  • Spent a couple hours in the shop this evening digging up materials and playing with layouts for the new case.I think I have it roughly figured out. You can see the profile template I created laying on the cheap laminated shelving board in the pic above....
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