Search found 9 matches

by jim121049
04 Nov 2019, 09:41
Forum: Keyboards
Topic: FPGA-based IBM Wheelwriter Option
Replies: 1
Views: 986

Re: FPGA-based IBM Wheelwriter Option

I'm interested. I have similar Wheelwriter projects (using an MCU) on GitHub: https://github.com/jim11662418
by jim121049
06 Oct 2019, 08:49
Forum: Keyboards
Topic: Problem with IBM Model F AT - all LED lights light up, no key output
Replies: 16
Views: 3043

Re: Problem with IBM Model F AT - all LED lights light up, no key output

Make sure that J1 on the Pro Micro (next to the USB connector) is bridged.
by jim121049
26 Aug 2017, 08:39
Forum: Keyboards
Topic: How to use Hasu's PS2 TMK on PS/2 with a pro micro?
Replies: 9
Views: 1950

If you're using a Pro Micro, make sure that J1 (in the upper left corner near the micro USB connector) is jumpered for 5V operation.
by jim121049
21 Feb 2017, 10:02
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

I had been stumped for the last week about why my Pro Micro (5v version) clone wasn't working with a Model F XT, but worked fine with a Model F AT. Turns out the Pro Micro I was using didn't have J1 soldered and thus there was additional voltage drop to the keyboard. On the particular PC I was usin...
by jim121049
27 Dec 2016, 12:37
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

Just a couple of additional points which may save some grief for anyone contemplating using a Pro Micro with a Bigfoot... 1. Connect "Frame Ground" on the Bigfoot's circuit board to "GND" on the Pro Micro. My setup wouldn't work correctly without this connection. 2. I changed "debounce 1" to "deboun...
by jim121049
27 Dec 2016, 10:10
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

I recently used a Pro Micro as a controller (not converter) for my Model F "Bigfoot" keyboard running Soarer's firmware. I was told that the Pro Micro didn't have enough pins and, since the controller needed access to PB6-PB0, it seemed that I would be one pin short (PB0) see http://i.imgur.com/wMN...
by jim121049
26 Dec 2016, 14:37
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

I recently used a Pro Micro as a controller (not converter) for my Model F "Bigfoot" keyboard running Soarer's firmware. I was told that the Pro Micro didn't have enough pins and, since the controller needed access to PB6-PB0, it seemed that I would be one pin short (PB0) see http://i.imgur.com/wMNx...
by jim121049
12 May 2016, 07:43
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

I built the converter using a pro micro clone that I bought from AliExpress. Although various modern PS/2 keyboards worked correctly, I couldn't get my PC/XT Model F keyboard to work using the USB as the power source. I had to use an external 5VDC power supply for the Model F keyboard to make it wo...
by jim121049
11 May 2016, 22:39
Forum: Workshop
Topic: How to use a Pro Micro as a cheap controller/converter
Replies: 339
Views: 125959

I built the converter using a pro micro clone that I bought from AliExpress. Although various modern PS/2 keyboards worked correctly, I couldn't get my PC/XT Model F keyboard to work using the USB as the power source. I had to use an external 5VDC power supply for the Model F keyboard to make it wor...

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