deskthority

Each time, you first wait a couple microseconds (why, I'm not sure, but it is recommended for the matrix to "settle"). It's because a microcontroller is scanning a voltage on an LRC circuit . Typical values are about: R = 33 kΩ, C = 5e-12 F, L = 0.5e-3 H You are interested mostly in the times t1=(-...

How about aluminium tape ? https://uk.rs-online.com/web/c/adhesives-sealants-tapes/tapes/aluminium-tapes/ THe surface may be protected with something but you can just rub it off with a scotchbrite I thought about this, but ultimately I feel it will be too fiddly and time consuming - at that point I...

Over here at least, every major city has a place that sells and repairs tv remotes, maybe they can help you. If you look for a place like that (or one that repairs TVs for example) you may have it repaired for a few bucks. Rule of thumb: the older the technician is, the better. And, if everything el...

How about aluminium tape ?
https://uk.rs-online.com/web/c/adhesive ... ium-tapes/

THe surface may be protected with something but you can just rub it off with a scotchbrite

Maybe a silver ink conductive pen will work fine. https://www.ebay.com/itm/Conductive-Silver-Ink-Pen-Writer-Circuit-Marker-50-Silver-CSIP-998/222892596383?hash=item33e56f1c9f:g:kJIAAOSwImRYCx2P:rk:1:pf:0 I've heard the same thing about using those conductive silver pens as using a graphite pencill,...

Maybe a silver ink conductive pen will work fine.

https://www.ebay.com/itm/Conductive-Sil ... :rk:1:pf:0

If you want, you can use a graphite pencil but make sure it's graphite. You can just rub some on. I have fixed two of these keyboards and I have never had to use anything. Just a good cleaning should fix them. If I recall correctly, I used an eraser to clean the rubber tips. Good luck. Disassemblin...

Good link thanks.

If you want, you can use a graphite pencil but make sure it's graphite. You can just rub some on. I have fixed two of these keyboards and I have never had to use anything. Just a good cleaning should fix them. If I recall correctly, I used an eraser to clean the rubber tips. Good luck. Disassembling...

Hey all, I recently acquired a Commodore SX-64 and the keyboard is really hit or miss. Some keys either required hard presses or multiple presses, and others didn't work at all. I followed this tutorial and disassembled it: http://wolfgang-langer.com/commodore-sx64-keyboard-repair/ My keyboard appea...

@Laser Thank you for your answer! So, I have tested quite a good things. I even think I had started to brick my Pro Micro card. It seems it is now OK. 1. It seems dfu-programmer never finds the board. How to target it? root# dfu-programmer atmega32u4 erase dfu-programmer: no device present. 2. The b...

I've organised a small groupbuy for Amoeba 1U and 2U PCBs from JLCPCB. Reseived the order on 21.12 (express shipping to Russia took 16 days): https://i.imgur.com/ehxmaIu.jpg There were 1500 Amoeba 1U PCBs on 50 5x6 panels ($33.47), 75 Amoeba 2U ($11.02), 10 Mitosis PCBs ($17.00) and 10 Lobot PCBs ($...

Hello, I am offering this nice used set. Price 33€ + shipping cost (from Czech republic - to Europe 6€, to USA and worldwide 10€) More sets avialable. Set is from used DESKO keyboard BM4000 - Cherry doubleshot keycaps - Two Shot Molded - Black and White, fits Cherry micro switch Cherry MY, type 3 an...

So much for "Sigma". Looks like I found a new Chicony.

Yes it should fit - there is at least 33mm north of the inner assembly that is free space. The inside height is 24mm. Would someone mind posting the specs and spec tolerances of the ideal solenoid? Something like 9V (6-12V), 33 ohms (25-35 ohms), throw distance XYZ mm, etc. and I can see what an OE...

Yes it should fit - there is at least 33mm north of the inner assembly that is free space. The inside height is 24mm. Would someone mind posting the specs and spec tolerances of the ideal solenoid? Something like 9V (6-12V), 33 ohms (25-35 ohms), throw distance XYZ mm, etc. and I can see what an OEM...

More solenoid info : https://deskthority.net/w-a-n-t-t-o-b-u-y-f59/beamspring-solenoids-t17066.html Some pics : https://imgur.com/a/q2LhF Thanks for the link! Good to know that the ebay model (same as the Ali one that NilesLinus has) works. I am a bit confused by the discussion of a "normal solenoi...

doing a quick bit of research on mouser and digikey produces this: http://www.deltaww.com/filecenter/Products/download/04/0409/DSOS-0416-D.pdf those should operate somewhat near the parameters needed electrically. getting the bit of metal bent to properly mount the thing and have it make the correct...

I ordered it from Ali. I agree that some first-hand experimentation is probably in order. I don’t mind burning through a solenoid or two. I’d be less enthusiastic about burning through an Xwhatsit board. Confirmed by xwhatsit himself: Those Sparkfun solenoids might not be such a good idea. Unlike t...

My understanding, which is only superficial, is that the unimap "grid" is bigger than the physical keyboard because it's built to support (at least) 2 keyboards with different physical layouts. So each keyboard, either the 4704 or our pingmasters, uses a different subset of the unimap. The important...

Please forgive my ignorance here - from what I understand, you need to know three things: When the damper is released (key pressed partially) When the hammer is moving When the hammer strikes the stop It sounds like this could be accomplished with three optical digital switches positioned such that ...

I'm not sure if the "Tixo" or PDP-1 are still there. ... I saw the "LISP Machine" in person. Wow, really interesting! Thanks MMcM, XMIT & everyone for this thread. :-) I was on a different continent at the time; but it reminded me I learned how LISP worked by reading a PDP-1 assembly listing I foun...

I recently met a man named Aaron who had discovered a cache of terminals from the 1980's. More on that to come. Among them were a few made by the Teletype Corporation subsidiary of AT&T. This terminal used 122 key style keyboard that I had not seen before. At first glance I wasn't expecting anything...

Well, I may have finally found a combination that caught my eye. In this case, it's a translucent white key cap set from Aliexpress, and white stickers from 4keyboard. I'm still thinking about it, since I 'm not sure of such combination. Anyway, being translucent, the keys will let some light get th...

So weird! It's like it sends xt scancodes but all the keys are shifted three columns to the right!

a (make: 33| break: 161)


s (make: 34| break: 162)


d (make: 35| break: 163)

Sangdrax wrote: ↑Looks great. Love the case color and ANSI mod. Always a joy to see these old tanks restored.

I like RAL-7030 "stone gray" as case color.
Model Fs are so easy to modify and they are built to be highly modular. Just fantastic to breath new life into a 33 year old keyboard that is a joy to use.

Hi guys, I've seen you're interested in my project :) I'll be very short since I am kind of busy these days... One of the most important parts of my project is that I don't rely on ADC because it is slow, even though the ADC on the Teensy board is pretty fast. I mean it is fast by itself but I need ...

Welcome! I recently ran a GB for the Omnikey PCB I designed and after a few modifications to fix compatibility with older variants of the omnikey, I am back with round 2. Along with the Omnikey board I will have the AT101/AT101W/SGI board and a Zenith Z-150 board for sale as well. Details below PCB...

https://ebay.to/2MQfTH5 Meh... It has too many colors for me :D The Cougar Vantar is about $33(ish) in USD. It is very low profile and isn't the monstrous price of a BFKB113PBK (which is near $100 USD). If you want something a bit more durable than the C.V. at the cost of the keyboard's keys being ...

The Cougar Vantar is about $33(ish) in USD. It is very low profile and isn't the monstrous price of a BFKB113PBK (which is near $100 USD). If you want something a bit more durable than the C.V. at the cost of the keyboard's keys being about 3.8mm high, the Perixx PX-1900 is about $40 USD. The reboun...