Rue Mohr
@ruenahcmohr.bsky.social
Rue Mohr, Recreational Technologist. Robotics: Electronics, Programming, Mechanics.
Not retro, but Z80 is the best of all time.
Not retro, but Z80 is the best of all time.
Hmm, scrounging parts from some medical machines that use 5 phase motors. Interesting mystery, they only use low side drivers for 5 totem poles... do they just drive the high side FETs 15V over the high power rail?
November 26, 2025 at 5:05 AM
Hmm, scrounging parts from some medical machines that use 5 phase motors. Interesting mystery, they only use low side drivers for 5 totem poles... do they just drive the high side FETs 15V over the high power rail?
Morning random image!
oh, heh, hmm ok. sure
oh, heh, hmm ok. sure
November 25, 2025 at 9:24 PM
Morning random image!
oh, heh, hmm ok. sure
oh, heh, hmm ok. sure
arg, I still got this virus or whatever. grrr.
oh well, maybe more electronics today.
oh well, maybe more electronics today.
November 25, 2025 at 3:02 PM
arg, I still got this virus or whatever. grrr.
oh well, maybe more electronics today.
oh well, maybe more electronics today.
hey!
Lets try this...
Rues Nov 2025 Transistor Challenge!
See if you can make the most minimal circuit in the middle that performs the function!
Here, its an up/down binary counter.
I have an idea how to do it that I will attempt, do you have an idea? reply with it!
Lets try this...
Rues Nov 2025 Transistor Challenge!
See if you can make the most minimal circuit in the middle that performs the function!
Here, its an up/down binary counter.
I have an idea how to do it that I will attempt, do you have an idea? reply with it!
November 25, 2025 at 5:03 AM
hey!
Lets try this...
Rues Nov 2025 Transistor Challenge!
See if you can make the most minimal circuit in the middle that performs the function!
Here, its an up/down binary counter.
I have an idea how to do it that I will attempt, do you have an idea? reply with it!
Lets try this...
Rues Nov 2025 Transistor Challenge!
See if you can make the most minimal circuit in the middle that performs the function!
Here, its an up/down binary counter.
I have an idea how to do it that I will attempt, do you have an idea? reply with it!
later I gave this circuit a try, its from
@killnotsees on twitter. This circuit does binary-to-1-of-4 decoding, with 3 transistors.
Thats my kinda circuit! ;]
@killnotsees on twitter. This circuit does binary-to-1-of-4 decoding, with 3 transistors.
Thats my kinda circuit! ;]
November 25, 2025 at 4:04 AM
later I gave this circuit a try, its from
@killnotsees on twitter. This circuit does binary-to-1-of-4 decoding, with 3 transistors.
Thats my kinda circuit! ;]
@killnotsees on twitter. This circuit does binary-to-1-of-4 decoding, with 3 transistors.
Thats my kinda circuit! ;]
Interesting day, I woke up really ill, booked off sick for work and chewed into some electronics a bit. This is a light sequencer for a post about turning signal lights that keeps coming up in my feeds.
November 25, 2025 at 3:56 AM
Interesting day, I woke up really ill, booked off sick for work and chewed into some electronics a bit. This is a light sequencer for a post about turning signal lights that keeps coming up in my feeds.
@rigelme.bsky.social
If I could make LVDC sensors out of pipe it would be awesome the slop in the pipe cancels itself out. But when I tried I could not get the capacitance up enough for a good signal, not even at 20MHz. I have been pondering an optical unit with a gate...
If I could make LVDC sensors out of pipe it would be awesome the slop in the pipe cancels itself out. But when I tried I could not get the capacitance up enough for a good signal, not even at 20MHz. I have been pondering an optical unit with a gate...
November 24, 2025 at 10:59 PM
@rigelme.bsky.social
If I could make LVDC sensors out of pipe it would be awesome the slop in the pipe cancels itself out. But when I tried I could not get the capacitance up enough for a good signal, not even at 20MHz. I have been pondering an optical unit with a gate...
If I could make LVDC sensors out of pipe it would be awesome the slop in the pipe cancels itself out. But when I tried I could not get the capacitance up enough for a good signal, not even at 20MHz. I have been pondering an optical unit with a gate...
morning random image
From this year, auto power failover.
I use this for when I have to replace my UPS (but keep my computer running)
From this year, auto power failover.
I use this for when I have to replace my UPS (but keep my computer running)
November 24, 2025 at 7:16 PM
morning random image
From this year, auto power failover.
I use this for when I have to replace my UPS (but keep my computer running)
From this year, auto power failover.
I use this for when I have to replace my UPS (but keep my computer running)
ok, I think I made this simple enough that even if I was asleep I could build it right.
its a wiring harness for a system to alternate my two septic system pumps.
its a wiring harness for a system to alternate my two septic system pumps.
November 23, 2025 at 11:39 PM
ok, I think I made this simple enough that even if I was asleep I could build it right.
its a wiring harness for a system to alternate my two septic system pumps.
its a wiring harness for a system to alternate my two septic system pumps.
I was working on a design for a linear position sensor yesterday, I was hoping this circuit would work out well, but it wasn't being linear with the variable inductor I made.
November 23, 2025 at 7:58 PM
I was working on a design for a linear position sensor yesterday, I was hoping this circuit would work out well, but it wasn't being linear with the variable inductor I made.
Who said DIY CCD?
With microcontrollers, it should be easy now.
With microcontrollers, it should be easy now.
November 23, 2025 at 7:03 AM
Who said DIY CCD?
With microcontrollers, it should be easy now.
With microcontrollers, it should be easy now.
Hair dryer boiling water under a vacuum in plastic syringe.
By Rue Mohr
By Rue Mohr
November 23, 2025 at 5:26 AM
Hair dryer boiling water under a vacuum in plastic syringe.
By Rue Mohr
By Rue Mohr
a staircase generator that would be suitable for that graph circuit I was pondering. I don't need the rest or the input driver, so that sort reduces it to just the 1 transistor.
November 22, 2025 at 8:14 PM
a staircase generator that would be suitable for that graph circuit I was pondering. I don't need the rest or the input driver, so that sort reduces it to just the 1 transistor.
Reposted by Rue Mohr
@sad-electronics.bsky.social
if I wanted to make a really "high resolution" led strip, how close could I expect a PCBA to pack 0402 (imperial) LEDs?
do you think anyone could pull off 256/20cm?
if I wanted to make a really "high resolution" led strip, how close could I expect a PCBA to pack 0402 (imperial) LEDs?
do you think anyone could pull off 256/20cm?
November 22, 2025 at 7:21 AM
@sad-electronics.bsky.social
if I wanted to make a really "high resolution" led strip, how close could I expect a PCBA to pack 0402 (imperial) LEDs?
do you think anyone could pull off 256/20cm?
if I wanted to make a really "high resolution" led strip, how close could I expect a PCBA to pack 0402 (imperial) LEDs?
do you think anyone could pull off 256/20cm?
no Rue, you cant outpost the nanoraptor.
November 22, 2025 at 7:07 AM
no Rue, you cant outpost the nanoraptor.
I cant get this out of the back of my mind, the idea is that the 4017 strobes the leds, and the comparator triggers the display during the correct values. But I want dot mode. (this is bar mode)
I suppose I could also use a staircase generator, might sync better.
I suppose I could also use a staircase generator, might sync better.
November 22, 2025 at 6:37 AM
I cant get this out of the back of my mind, the idea is that the 4017 strobes the leds, and the comparator triggers the display during the correct values. But I want dot mode. (this is bar mode)
I suppose I could also use a staircase generator, might sync better.
I suppose I could also use a staircase generator, might sync better.
I have a thing for blinking clear LEDs tho...
(music is by @LOOKMUMNOCMPUTR again)
(music is by @LOOKMUMNOCMPUTR again)
November 22, 2025 at 6:17 AM
I have a thing for blinking clear LEDs tho...
(music is by @LOOKMUMNOCMPUTR again)
(music is by @LOOKMUMNOCMPUTR again)
It works too!
( LOOK MUM NO COMPUTER )
( LOOK MUM NO COMPUTER )
November 22, 2025 at 5:35 AM
It works too!
( LOOK MUM NO COMPUTER )
( LOOK MUM NO COMPUTER )
A 2->4 decoder using open collector inverters. :]
There was some inspiration for the sillyness from twitter.
There was some inspiration for the sillyness from twitter.
November 22, 2025 at 5:33 AM
A 2->4 decoder using open collector inverters. :]
There was some inspiration for the sillyness from twitter.
There was some inspiration for the sillyness from twitter.
"Hey, cmon, lets build something fun before the ToDo list finds us!"
November 22, 2025 at 12:53 AM
"Hey, cmon, lets build something fun before the ToDo list finds us!"
Reposted by Rue Mohr
ToDone ✅
Medium grind pepper, because WTF the stores don't carry it anymore.
Medium grind pepper, because WTF the stores don't carry it anymore.
November 21, 2025 at 2:53 AM
ToDone ✅
Medium grind pepper, because WTF the stores don't carry it anymore.
Medium grind pepper, because WTF the stores don't carry it anymore.
ToDone ✅
- Build new clamp so ma can use the dremel drillpress on her art stuff.
- Build new clamp so ma can use the dremel drillpress on her art stuff.
November 21, 2025 at 2:17 AM
ToDone ✅
- Build new clamp so ma can use the dremel drillpress on her art stuff.
- Build new clamp so ma can use the dremel drillpress on her art stuff.
I was able to pour off a little more water today, they wild clay is on its way.
I dont have any sun to put it in... so the next steps might be hard, but how much water do I want to take it down to? like, I dont have to dry it completely out...
I dont have any sun to put it in... so the next steps might be hard, but how much water do I want to take it down to? like, I dont have to dry it completely out...
November 21, 2025 at 12:25 AM
I was able to pour off a little more water today, they wild clay is on its way.
I dont have any sun to put it in... so the next steps might be hard, but how much water do I want to take it down to? like, I dont have to dry it completely out...
I dont have any sun to put it in... so the next steps might be hard, but how much water do I want to take it down to? like, I dont have to dry it completely out...