Spectrum Membrane to USB adapter
Code is licenced under the MIT liscence see HERE
This code in its current iteration will allow the cheap and cheerful Arduino Promicro to read a spectrum 48k/128k/plus 2 key presses and return the correct keypresses as a USB keyboard. Use it conjunction with the Deadflesh usb PCB.
Please read below to get started. Code more or less works it is being improved all the time.
from me Nadoom aka backus-cheese-emporium on ebay search for deadflesh usb
Here is the link: https://www.ebay.co.uk/itm/375260941327
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| # | Reference | Qty | Value | Footprint |
|---|---|---|---|---|
| 1 | ArduinoProMicro1 | 1 | ProMicro | promicro:ProMicro Castillated one if you want less work, but they are a bit more expensive. |
| 2 | Power1 | 1 | Conn_01x02 | 1x2 pin header, can be ignored if you are just using a membrane kb |
| 3 | RN1 | 1 | Pull down | Resistor_THT:R_Array_SIP9 a 9 pin resistor array 10K (Bourns, 4600X 10kΩ) RS: 522-4071 |
| 4 | RN2 | 1 | Pull down | Resistor_THT:R_Array_SIP6 a 6 pin resistor array 10K (Bourns, 4600X 10kΩ) RS: 522-3488 |
| 5 | SpectrumKB5 | 1 | Conn_01x05_Male | Different options: JST FDZ series 2.54mm FPC Connectors RS search: 6387268 (Bit too tight tbh) |
| 6 | SpectrumKB8 | 1 | Conn_01x08_Male | Different options: JST FDZ series 2.54mm FPC Connectors RS search: 6387280 (Bit too tight tbh) |
Alternatively you can use it directly using the pinouts below, and roll your own:
Pins represent generic physical pin positions not assigned arduino pins (counter clock wise from top left) Wire up according to this diagram..
5 pin connector
[5 6 7 8 9]
________
| Ribbon |
8 pin connector
[13 17 14 15 16 12 11 10 ]
______________________
| Ribbon |
You must pull down all lines to ground ( Pin 3,4,23 ) with 10K resistor
If you want to send me some appreciation : https://www.buymeacoffee.com/nadoom
My email is [email protected]