Author | Lightnews

Rue Mohr

Rue Mohr

@ruenahcmohr.bsky.social

1.6K followers 83 following 4.6K posts

Rue Mohr, Recreational Technologist. Robotics: Electronics, Programming, Mechanics. Not retro, but Z80 is the best of all time.

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Rue Mohr @ruenahcmohr.bsky.social · 1m

Wait, did you try this...

Rue Mohr @ruenahcmohr.bsky.social · 1m

Ah, all my part definitions are obsolete AGAIN? I feel so surprised.

Rue Mohr @ruenahcmohr.bsky.social · 3m

Pipe wire?

Rue Mohr @ruenahcmohr.bsky.social · 9h

{Gives LM555 to snuggle with}

Rue Mohr @ruenahcmohr.bsky.social · 9h

"one wire" Dallas, it uses 2 wires..

Rue Mohr @ruenahcmohr.bsky.social · 16h

Static go BZZZT on your SSD. I dont miss that.

Rue Mohr @ruenahcmohr.bsky.social · 16h

Well, it contains text messages in 5 languages (atleast) containing names of the months and 2 digit numbers from 00 to 59.. I have seen systems where all the user software is just config script.

Rue Mohr @ruenahcmohr.bsky.social · 18h

Check out the offset tho, whats with that...

Rue Mohr @ruenahcmohr.bsky.social · 21h

I tried a few tools and completely failed to be able to get them to id the processor.

Rue Mohr @ruenahcmohr.bsky.social · 1d

Morning random image

2018: wall pencil holder. I think this is posted on thingiverse...

Rue Mohr @ruenahcmohr.bsky.social · 1d

*blink*

Rue Mohr @ruenahcmohr.bsky.social · 1d

huh, I guess the CH32V003 is fast enough to do on-the-fly i2c address remapping.... drat, I wanted to use a CPLD....

Rue Mohr @ruenahcmohr.bsky.social · 1d

ok, the image is odd, its got a huge 0xEA header, but I do see what looks like it could be a vector table...

(note the "3C" followed by 2 bytes, then repeating) 5 vectors.

I wonder if this memory is mapped funny.

Rue Mohr @ruenahcmohr.bsky.social · 1d

THIS is the ROM from a newer model nortel digital phone. would anyone like to guess what processor the firmware on it will be for?

Rue Mohr @ruenahcmohr.bsky.social · 1d

HOLY WIND STORMS THERE ARE TREES BREAKING EVERYWHERE!

(says the guy in canada)

Rue Mohr @ruenahcmohr.bsky.social · 1d

Oh wait, if its kiwa then he metered the contacts and its actaully the switch. .... contact cleaner...

Rue Mohr @ruenahcmohr.bsky.social · 1d

Contact cleaner spray, one you give it to a switch, its addicted for life. But I think the problem is the pullup resistor.

Rue Mohr @ruenahcmohr.bsky.social · 1d

Well, I have an aplle II, should I put it on discs for anyone?

Reposted by Rue Mohr

Flora 🌺 @florasys.bsky.social · Feb 18

here's the schematic, it's exactly the same as the model 1's onboard design, just duplicates it for each channel instead of mixing them down to mono.

whole thing fits comfortably into a 23mm x 13mm (0.9in x 0.5in) board if you can do smt soldering.

i can't offer tech support, but have fun 💜

schematic for the aforementioned mod. just a pair of LM358 inverting op amp circuits with a 22nF bypass cap, 10uF output caps, ferrite beads at the output connector, and a voltage gain of ~6.6 (Rf = 33k; Ri = 4.99k)

suggested PCB layout for using an SOIC chip and 0603 components

Reposted by Rue Mohr

carlosvolt.bsky.social @carlosvolt.bsky.social · Apr 18

Medidor de corriente, frecuencia de red y potencia no invasivo
rogerbit.com/wprb/3478
En esta entrada veremos como medir la corriente la frecuencia y la potencia con un sensor de corriente no invasivo SCT-13-50, un amplificador dual LM358.

Rue Mohr @ruenahcmohr.bsky.social · 2d

When you hit enter and everything actually works, the way you wanted it to.

Rue Mohr @ruenahcmohr.bsky.social · 2d

cool, I'd be curious to see a photo log of the takedown!

Rue Mohr @ruenahcmohr.bsky.social · 2d

Morning random image

my *unfinished* but working, constant current load. I have an arduino on there to set currents and record voltages. I have used it for battery testing and AC adapter load profiles.

Rue Mohr @ruenahcmohr.bsky.social · 2d

I wonder what the pressure was...

Rue Mohr @ruenahcmohr.bsky.social · 2d

pff, I'm not a sportsfan and even I know its got something to do with baseball.