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ajlitt

Amateur take-apartist and SnPb enthusiast

Austin, Texas
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ajlitt

This user joined on 02/03/2015.

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Dr. Cockroach wrote 07/02/2020 at 09:36 point

Hey there ajlitt and thanks for the follow/like of #LLTP - Light Logic Transistorless Processor 

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Starhawk wrote 05/03/2020 at 20:13 point

...breaking from form, just for a moment (forgive me!)... I really like your Blinkencard project -- but how hard would it be to add the switches and rework it to use an ESP8266 and either a huge stack of shift reg ('595s and 4021s come to mind!) or input expander chips...?

I'm dirt cheap out of necessity... could probably do it on two perfboards (size is not a significant concern) but I have neither FPGA nor ESP32. Also, not having switches kinda bums me out.

It'd be super cool if I could somehow work in disk emulation with eg a FAT32 SD Card or something... and full emulation of the OS... mind you, I'm absolutely not a programmer, tho... someone else would have to implement that. I can help test but I'm absolutely not competent beyond that.

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ajlitt wrote 05/04/2020 at 15:48 point

Thanks! The Blinkencard is an emulation of the underlying logic of an Altair, and is a project I came up with to give me an excuse to play with FPGAs. I'm sure you could do the same on an ESP8266, but it would have to be a software emulation. There's an Arduino-based Altair emulator that could be a basis for such a project on ESP*: https://create.arduino.cc/projecthub/david-hansel/arduino-altair-8800-simulator-3594a6

You may be able to do what you're talking about if you stick to emulating Altairs with little ROM or RAM, and you may need to build baremetal instead of with wifi. The shift registers would certainly work, but may be flickery. I'm only multiplexing in banks of 8 LEDs with the FPGA emulation, and even then I've had to tune the scanning so that the LEDs look right. This may be a place where you could abuse the I2S interface on the ESP8266 to clock the shift registers consistently and quickly.

I'm fairly cheap as well, and I thought about cost from the beginning. My first design used an FTDI FT2232 for firmware loading and serial terminal, but the FTDI was about as much as the FPGA. Using an ESP32 lets me get rid of the FTDI and config flash for the FPGA, and accounting for the support components for the FTDI is about half as expensive. I plan to use the ESP32 for additional stuff like viewing the LEDs and controlling switches from a webpage andacting as a disk drive using a file in the ESP32's flash as a disk image.

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Starhawk wrote 05/03/2020 at 20:06 point

NOW FLASHED A NORFOLK KILT

;)

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ajlitt wrote 05/04/2020 at 15:52 point

CELERY MEOW YOU RAVE

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Starhawk wrote 05/04/2020 at 17:54 point

SOY LEAKAGE RUIN A SEMI

;)

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Daren Schwenke wrote 09/22/2018 at 08:50 point

Thank you for the like of the #Arcus-3D-C1 - Cable 3D printer .  Better late than never..  (finishing it up). :)

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uri.shani wrote 09/03/2018 at 08:07 point

Thanks for liking #Cap-sense name card!

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Patrick Van Oosterwijck wrote 07/28/2018 at 02:02 point

Thanks for your interest in my #wESP32: Wired ESP32 with Ethernet and PoE project! :)

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Bharbour wrote 01/14/2018 at 12:51 point

Thanks for liking my #EL Wire Clock 

I like your cat picture!

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Dr. Cockroach wrote 09/28/2017 at 08:32 point

Good morning Ajlitt and thanks for liking my Uglytech relay :-)

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Ed S wrote 07/27/2017 at 15:14 point

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Jie Zou wrote 07/12/2017 at 15:48 point

Thank you for following RGGBer project. It is now live on 

https://www.crowdsupply.com/jie-zou/rggber-dev-kit and we will launch it in Aug 2017 and you may sign up for latest information. RGGBer Dev Kit makes embedded vision development easy!

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Patrick Van Oosterwijck wrote 05/29/2017 at 18:40 point

Thank you for liking and following my #LiFePO4wered/Pi+ project ajlitt!

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esot.eric wrote 03/08/2017 at 13:35 point

Hey ajlitt, Thanks for the 'like'!

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Jie Zou wrote 10/28/2016 at 08:14 point

Thanks for your follow. These have been several updates in logs.  Enjoy!

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Chris Roberts wrote 10/24/2016 at 17:52 point

Hey, thanks for the like on Holst! I hope you find the documentation interesting as I piece it together. Like your projects, will definitely check them out :)

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MECHANICUS wrote 04/27/2016 at 05:46 point

Thanks for liking my project bro! Sweet cat, should make a hairball supercapacitor!

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Nicolas Berger wrote 02/03/2016 at 22:43 point

Thank you for your interest in the Joysix. I will do my best to update and document it!

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Patrick Van Oosterwijck wrote 02/03/2016 at 18:45 point

Hey, thanks for the skull for #LiFePO4wered/Pi!   Love your RPi WiFi project by the way. :)

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davedarko wrote 02/03/2016 at 14:26 point

Glad to see that you've submitted #RPi WiFi to the adafruit contest, I wish you good luck! :)

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Dean Gouramanis wrote 01/11/2016 at 22:22 point

Thanks for following ToastDuino!

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dave wrote 01/03/2016 at 00:53 point

Thanks for the skull. I like the "Amateur take-apartist" I wish I had thought of that...

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