Nostr notes by Rue Mohr

I would like to point out something very serious. Years ago I ...

2026-03-17T07:54:11Z

I would like to point out something very serious. Years ago I developed a technique for shifting serial data into a 74hc595 chain without use of a microcontroller. I have not been able to help but notice that people have been using raspberry pi's instead of my simple circuit.
For the same reason you DONT actually need 32G of ram to run a web browser, you don't need to use a Pi to convert serial data to parallel. I mean cmon, Its using a 555 as a BUFFER. a BUFFER!
https://github.com/ruenahcmohr/serial-595-9600
Please conserve the technology people.

Hi, my name is Rue, You may know me from places like the ...

2026-03-10T00:20:20Z

Hi, my name is Rue,
You may know me from places like the internet, the world wide web, or the information superhighway.
I am determined to get 52 robots going this year, 1/week. I'm about to tell you about this weeks robot.

You all know that 82inch monitor you just threw out yesterday ...

2026-03-07T23:38:40Z

In reply to nevent1q…rd2r
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You all know that 82inch monitor you just threw out yesterday when you bought the 83" monitor that had a contrast ratio that was 0.05% better?

Well congratulations, you just killed a dolphin.

640k is all.... mmm well, maybe not.

2026-02-18T00:18:28Z

In reply to nevent1q…jwuu
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640k is all....
mmm well, maybe not.

If you software wasn't so bloated, you would only need 1/4 of ...

2026-02-18T00:07:15Z

If you software wasn't so bloated, you would only need 1/4 of the ram you want.

Microsoft will allow you to embed a virus in any of their ...

2026-02-15T09:28:38Z

In reply to nevent1q…w3sw
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Microsoft will allow you to embed a virus in any of their formats, use this to pull data from the web.

:D

OMG, this thing has been buried under boxes for years, and thru ...

2026-02-02T21:45:47Z

OMG, this thing has been buried under boxes for years, and thru all the power outages, it managed to stay up. I honestly didn't think ANY version of windows could do this. This laptop...

"I especially appreciate how easy these batteries are to ...

2026-02-02T05:19:01Z

In reply to nevent1q…suhf
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"I especially appreciate how easy these batteries are to mount, just a single screw into the threaded PCB insert, its so much more compact and easy to change"

yes, they modified it slightly for injection molding, the one I ...

2026-01-19T05:28:39Z

In reply to nevent1q…29hv
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yes, they modified it slightly for injection molding, the one I printed had all sorts of issues, but honestly, after assembling this I dont think it was that bad...

"My foot? oh, yea it falls off like that all the time" I ...

2026-01-19T04:52:09Z

"My foot? oh, yea it falls off like that all the time"

I finished assembling this model I paid too much for from china. the injection moldings were awful.

Maybe its not a matter of someone holding on to them, but that ...

2026-01-09T14:31:53Z

In reply to nevent1q…n68n
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Maybe its not a matter of someone holding on to them, but that nobody is throwing them away.

;]

ok, so who made those strings? was it #[error(

2026-01-09T14:23:01Z

In reply to nevent1q…4w30
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ok, so who made those strings?

was it

#[error(

so... the source problem of the leak isn't fixed?

2026-01-08T14:13:46Z

In reply to nevent1q…rxrh
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so... the source problem of the leak isn't fixed?

what, no, E=mc² Everybody knows that! :]

2025-11-24T21:06:11Z

In reply to nevent1q…ajne
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what, no, E=mc² Everybody knows that!

:]

oh, morning random image, nobody ever reminds me... From this ...

2025-11-24T19:13:16Z

oh, morning random image, nobody ever reminds me...

From this year ;]

I am super good at bowling, I always get the ball past all those ...

2025-11-19T01:26:30Z

In reply to nevent1q…p2ur
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I am super good at bowling, I always get the ball past all those glasses without knocking any of them over!

remember the rest states and keyframes! ;]

2025-09-25T20:32:11Z

In reply to nevent1q…cjzy
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remember the rest states and keyframes!

;]

You know how canbus does that part right? I thought it was a cool ...

2025-08-18T23:48:17Z

In reply to nevent1q…89vy
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You know how canbus does that part right? I thought it was a cool trick.

OK, so, yea, I'd never really thought about the paint job on ...

2025-06-25T07:59:59Z

OK, so, yea, I'd never really thought about the paint job on ferrite cores, but there is a thing to this, here is what I'm seeing....

hu? but its rs232, your not supposed to be able to burn it out. ...

2025-06-19T23:29:05Z

In reply to nevent1q…edaf
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hu? but its rs232, your not supposed to be able to burn it out. and you can use the program I posted to get the data.

or build the paralell port adapter I designed
?

tabo using the 0 subnet, 192.168 is a class C space comprised of ...

2025-05-27T23:13:07Z

In reply to nevent1q…s23c
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tabo using the 0 subnet,
192.168 is a class C space comprised of addresses from 192.168.0.1 to 192.168.255.254 it can be split into sub-spaces but in particular circumstances on networks you get cornered when using 0 in the 3rd octet.

wtf doesn't EVERYONE know NOT to use 0???

2025-05-27T23:09:32Z

In reply to nevent1q…x2dh
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wtf doesn't EVERYONE know NOT to use 0???

wow, microsoft will probably love this, no more having to fix ...

2025-04-16T02:50:42Z

In reply to nevent1q…x6kt
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wow, microsoft will probably love this, no more having to fix those pesky security issues. (?)

I know you like your code editor, but, can it do this? ...

2025-04-06T22:11:02Z

I know you like your code editor, but, can it do this?

🤔 .... but....uh... ...

2025-03-08T22:48:22Z

In reply to nevent1q…2td0
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🤔 .... but....uh...

oh, are you tracking one of the edges in one direction ...

2025-03-08T22:35:04Z

In reply to nevent1q…5rme
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oh, are you tracking one of the edges in one direction (rising/falling) or both in both?

I have a nice little FSM that I like to use with incremental ...

2025-03-08T22:34:25Z

In reply to nevent1q…5rme
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I have a nice little FSM that I like to use with incremental encoders, but I'm not sure it would be fast enough.

#define ERROR 0
signed char offsets[] = {
/* 0000 */ 0,
/* 0001 */ +1,
/* 0010 */ -1,
/* 0011 */ ERROR,
/* 0100 */ -1,
/* 0101 */ 0,
/* 0110 */ ERROR,
/* 0111 */ +1,
/* 1000 */ +1,
/* 1001 */ ERROR,
/* 1010 */ 0,
/* 1011 */ -1,
/* 1100 */ ERROR,
/* 1101 */ -1,
/* 1110 */ +1,
/* 1111 */ 0
};

oldstate = oldstate | (PIND & 0x0C); // Update Oldstate
position += offsets[oldstate]; // Update Position
oldstate = oldstate >> 2;

(pulled from an AVR port of the code)

were talking about the joysticks, right? rotary? Their not pots ...

2025-03-08T22:03:48Z

In reply to nevent1q…3h6n
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were talking about the joysticks, right? rotary? Their not pots or magnetic with analog out?

.. and your counting the lines by interrupt? how fast is your z80?

cool what did you do for ADC, and thats an awfully large backup ...

2025-03-08T21:55:36Z

In reply to nevent1q…t5w8
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cool what did you do for ADC, and thats an awfully large backup battery you have...

https://github.com/ruenahcmohr/esp_01Expand32 I expect to see ...

2025-02-20T01:24:42Z

https://github.com/ruenahcmohr/esp_01Expand32

I expect to see them in the wild now ok?

dear internet archive, how can I (in canada eh?) help support ...

2025-02-04T04:16:06Z

In reply to nevent1q…mkjq
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dear internet archive, how can I (in canada eh?) help support data storage for you?

10 If I TELL you its base 16, do you call it ten or sixteen?. Hex ...

2025-01-16T00:49:26Z

10

If I TELL you its base 16, do you call it ten or sixteen?. Hex ten? zero-x-one-zero?

Action! Don't let trivial things cause hangups on your cool ...

2025-01-07T04:13:22Z

In reply to nevent1q…87p8
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Action!

Don't let trivial things cause hangups on your cool projects.

Sometimes, you have to finish to know how to start, that's just the way the universe is.

wires.. solder....power... ...

2025-01-07T04:10:55Z

In reply to nevent1q…0che
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wires.. solder....power...

Shameless repost from 2022. How t make a PCB without kicad. Or a ...

2025-01-07T04:09:42Z

Shameless repost from 2022.
How t make a PCB without kicad. Or a PCB...

1, holes... (this will be a thread)

#electronics #diy #diy_electronics

so, what is the update rate on that many decimal places?

2024-11-27T21:52:34Z

In reply to nevent1q…kjvx
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so, what is the update rate on that many decimal places?

I'm almost done, any silkscreen thoughts? ...

2024-10-31T09:55:56Z

I'm almost done, any silkscreen thoughts?

Latice (, ice40, ecp5, machx02, machx03, nexus) ok, I'm ...

2024-08-25T00:06:06Z

In reply to nevent1q…jafh
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Latice (, ice40, ecp5, machx02, machx03, nexus)

ok, I'm surprised there are not a few old xilinx in there.

I'll keep my eyes open for lattice chips!

Drat, I dont think it rendered right in my browser, I was curious ...

2024-08-24T22:41:01Z

In reply to nevent1q…r8wt
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Drat, I dont think it rendered right in my browser, I was curious if I could round up any supported FPGAs and play.

and I dont mind if it doesn't cover my case, but I'd ...

2024-08-24T22:27:41Z

In reply to nevent1q…yzhc
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and I dont mind if it doesn't cover my case, but I'd really appreciate a supported devices list :] (I haven't looked, I'm completely confident there is one. Lots of OSS FPGA projects say nowhere what FPGA they were designed for )

but I want to play with my e-waste FPGAs! ...

2024-08-24T20:35:22Z

In reply to nevent1q…9yz5
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but I want to play with my e-waste FPGAs!

cmon, lets not put all fpgas in the same group. you have to be ...

2024-08-24T19:53:21Z

In reply to nevent1q…hkfv
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cmon, lets not put all fpgas in the same group. you have to be specific about brands and generations.
For example, beside me here I have... lets see... Ah, an altera cyclone II, EP2C5F255C8N as a hobbyist, I'd LOVE to use this, but the toolchain dependencies are insane.