Rue Mohr
@RueNahcMohr
Followers
10,719
Following
130
Media
13,721
Statuses
58,605
1 Techie. Electronics, Programming, Mechanical. I do it for fun, but I walk a lonely road.
Gibsons, British Columbia
Joined April 2011
Don't wanna be here?
Send us removal request.
Explore trending content on Musk Viewer
rosé
• 596473 Tweets
Sinwar
• 369426 Tweets
AI学習
• 218191 Tweets
Bluesky
• 218025 Tweets
ブルスカ
• 191785 Tweets
スーパームーン
• 185119 Tweets
#わたしの宝物
• 180832 Tweets
ブルースカイ
• 180638 Tweets
JOURNEY CONCEPT PHOTO
• 143912 Tweets
#يحيي_السنوار
• 104999 Tweets
EFM X JACK AND JOKER
• 100739 Tweets
Kabir Is God
• 100624 Tweets
タイッツー
• 90362 Tweets
ILL BE THERE IN 7 DAYS
• 88066 Tweets
Tyler
• 87338 Tweets
インスタ
• 86083 Tweets
ALRIGHT TPOP STAGE
• 63338 Tweets
ログイン
• 63073 Tweets
블루스카이
• 57553 Tweets
Lealtad
• 50513 Tweets
LINGLING MYCHERIE AMOUR EP9
• 43461 Tweets
غير مدبر
• 30144 Tweets
Rafah
• 25447 Tweets
Monsalve
• 21652 Tweets
冬月くん
• 19569 Tweets
ふっかさん
• 14922 Tweets
ابو ابراهيم
• 14899 Tweets
個人サイト
• 14219 Tweets
Obolo
• 14096 Tweets
ふまふさん
• 12802 Tweets
復讐のレクイエム
• 10304 Tweets
くじらぐも
• 10228 Tweets
Pinned Tweet
Do you life activities include diagnosing bad capacitors on circuit boards? Take the time to build an in-circuit capacitor tester and stop needlessly replacing caps that are fine! It takes just seconds to go thru a board and identify all the bad caps!
38
74
414
Here is full binary search, worst case it takes 21ms (which is a horrid error scenario)
41
195
4K
'U' is a handy character because its hex code is 0x55, which is 01010101 in binary.
This makes it really easy to test baud rates for serial cause the electrons go:
_-_-_-_-
I expect everyone following me already knows this (if you didn't, you can just lie)
81
245
3K
I tested this circuit.
The transistor amplifier is really good, there is a lot of gain, and almost no noise.
The signal output range is really good, easily fed to the ADC of a microcontroller. The amplifier even works good at 5V.
The oscillator is cute, but not amazing.
16
92
1K
ITS 1AM.
I GOT SERIAL PROGRAMMING WORKING ON THE 1 BIT COMPUTER!!!!!!
THIS IS __AWESOME__!!!!!
(ugh, so much fight)
now I can *just* upload programs to it!!!
Its running off an SRAM chip!!!
24
61
629
Why would they glue down the only part that would ever need to be replaced???
90
19
596
all my followers see this, right?
12
49
548
So, nobody wanted me to do laser eye surgery on them. As such I'm stripping down the machine.
I have found a number of interesting things that explain why it weighs like 3000kg
22
30
532
ok, the test shows that I am finding this WAY too entertaining!
This is a tiny13 and A4988 motor driver. The input is analog 0-5V from a potentiometer.
Who wants a copy of the code!?
*may still have bugs.
The next step is Hobby PWM control.
19
41
471
Lest we not forget the steam powered FPGA.!
(which currently sits seized possibly beyond all recovery)
@RueNahcMohr
@yas0107
it isn't a square either... it's a trapezoid. And that is why the current and voltage don't play nice through a diode rectifier.
1
0
3
11
61
469
I'm going to make a half-hearted attempt to build a thread on i2c.
I will describe it completely differently than all the documentation.
9
28
429
THE SPEAKER BASED AIR PUMP SEEMS TO BE WORKING, ITS GREAT TECHNOLOGY, I HAVE NO IDEA WHY WE DONT USE IT MORE OFTEN.
what?
43
59
416
ohohohohoh I love this one
No feedback, stepper motor, with proportionate control and analog input!
Nope, it wont loose track! it uses position tracking and acceleration limiting!
click to read more ;]
10
26
419
This is a medical pump controller.
This is insane.
i80188 processor
FPGA to un**** the 8088 bus
8Mbits ROM
4Mbits RAM
dual UART
slave 8051
16bit 8 channel 200ksps ADC
!?!??!?!?!?!?!?!?
36
15
388
YES!!!! I can just assemble a program for the 1 bit computer and upload it thru a serial port!!! Here are the two assembled units side by side, being loaded with a program after powerup. I have 64k SRAM chips installed in these. The 555 clock module is adjustable.
5
37
375
Finally!, the secret to mounting those things on protoboard!
14
86
373
OMG LOOK WHAT CAME IN THE E-WASTE FROM WORK!!!! SWEEET!!!!!
ITS IN A SOCKET!!!
25
16
367
🤣🤣🤣
ok, there we have that, a steam powered CPLD LED flasher. hahahaha
Seeing as I'm multitasking anyhow, why not just randomly mix projects?
5
42
338
I'm not posting this to get likes, but because I think you will like it.
31
9
330
This is both super cool and totally unimpressive.
This 1 bit computer samples an input and sends the value as an ASCII character at 9600 baud using a carefully trimmed 555 RC oscillator. This is the source code I posted earlier this week!
5
30
329
OMG. Its happened, its actually happened. An error in a PCB design, due to a weakpoint in PCB cad software (kicad!!!) has actually lead to the creation of a new hardware component....
(image credit )
18
21
335
HARDWARE STATE MACHINES
I was so frustrated when I was first starting with this stuff because I had NOBODY I could talk to who understood any of it. (till about 3 years ago) I will try to tell the story of my work in order.
This is the basic configuration:
20
37
332
In this strange game, its the toys challenge to not touch you!
This worked nicely, sorry I didn't make a proper thread for it, if you search back thru my twitter mess you can find the other bits of it :]
attiny13, 2x IR sensors and LEDs, motor driver (and a sticky slider)
12
44
323
Lets play a game...
For 256 likes, I'll pull out the little one (portable II) and do a video of starting it up..
For 512 likes, I'll pull out the HUGE old luggable and try booting IT up.
I'm not worried as I anticipate 8 likes here.
😜
RueNahcMohr - NOT RETRO COMPUTING GUY, OK?
12
36
317
1-bit computer programming thread.
Cause, why not?
The 1-bit computer programs via an assembler-like language. My plan here is to make a loooooooong boring thread about programming it!
:]
9
35
306
So, it should be possible to make an LED that when powered, plays an internally stored music loop via a TOSLINK stream....
19
18
308
Wait, so your telling me that for years, these tiny little pickup coils have been made for really cheap and I'v not known about it!?!?!?
10
14
298
I HAVE DONE IT!
I HAVE DONE THE THING EVERYONE KNEW I COULD DO!
Its an operational interactive 74ls138 svg
Give it a try!
hint: red is high, green is low. pins G2* need to be low for it to be enabled. A,B,C select the active output pin.
9
40
290
Going thru old stuff, I need to make more soldering gun tips!!!
(this is from 2017 when I did the last batch)
18
25
289
PID loop controller ok, lets see what you....
HEY! WAIT!!....
:/
15
11
284
This is the same thing, but X is now located by successive approximation!
This is much faster and super cool.
Directions like this would not be possible without comments from people like you.
SO STOP JUST CLICKING LIKE.
20
11
284
New 1-bit program!
I call it 'vortex'
Into the vortex, out of the vortex, into the vor...
7
12
275
"OMFG, IT WORKS"
This is so crazy cool!
This is audio encoded as a corrupt 1 bit stream that you can regenerate with an RC lowpass.
This video is the recording setup, but 1 wire was moved to test play (and it works)
Whole audio here:
@LOOKMUMNOCMPUTR
HeLLo
18
37
262
ok, here is the performance of my best light pen, its activating basically the precise pixel I point at, from a really good distance (almost 1cm)
20
13
265
Oh I love internet schematics, how many errors can you find?
25
10
262
While looking for a good video card I found this.
How stupid! its got no outputs!!!
;)
38
9
256
🤣🤣🤣🤣
30MW, and thats just the pre-amp, wait until you see the power stage!!
39
11
247
(Sorting boxes of misc stuff)
Meh, laptop floppy drive..
WAIT... wut this????
45
15
245
I don't seem to have my v2 at hand, but this quick clip shows getting the battery in and out.
The side clips hold the battery down, which in turn holds the ends in. Pushing out the end clips ejects the battery (like bad ram!)
2
23
247
DIY crystal oscillator with DIY vacuum tube and DIY quartz crystal!
:]
やった！！！！！！！！自分で切り出した水晶板と自作の真空管で水晶発振回路を組み立てて発振させることに成功した！！！！！！！！！！！！！これで無線機が作れるぞ！！！！
68
2K
13K
7
29
242
A programming hardware
B CPU core
C input chip
D output chip
E clock (555 or crystal)
F 7 user LEDs
G 7 user switches
H Floppy drive power connector
I Serial port for programming and output
Jumpers allow LEDs and switches to be disconnected. :]
The other 74HC14 is glue logic ;]
3
29
238
How about a thread of wonderful new tech from 2023...
(yea, I hit the rate limit on mastadon while posting my 2023 summary...)
1) EGMK. Educated guess motor kicking, for stepping DC servos. WORKS GREAT! (if your motor doesn't blow up)
5
17
232
YAAAy! this code is "ready" for release too!
Have fun kids!
attiny13 and stepper driver to make servo.
12
29
224
🏅🎉🎉🎉🎉🎉🎉
Today I hit about 9700 bot followers!!!
200-300 of you are actually real people....
Lets try to get a count! if your real, reply to this tweet with anything, just mash that input device!
260
1
222
I bring more circuits, without specific comment.
Various power supplies.
9
14
219
My name is Rue, and I have a problem....
[I'm short on breadboards again...]
10
11
208
Hey, stop doom scrolling for a sec.
Do you want to build one of those 1-bit computers?
Tell me what details aren't in the github repo that you feel you need and I'll try to add the info!
:]
5
21
206
😯
10
31
208
Are you tired of hearing about the 1 bit computer yet?
There is more!
I built a 9.6kHz 555 module, here is the 1 bit doing serial data!
Its reporting the state of the switch in ASCII. Look, its fast enough to have caught the switch bounce!
4
23
209
I could have been a computer programmer that nobody has ever heard of, but no, here I am, on twitter, with aluminum chaff in my *everywhere*
I could be working on FPGA stuff right now...
10
10
198
Morning schematic, I'll try to make it a daily (maybe 5 days a week...)
11
10
196
What is Rue doing at 2am? Reading books of schematics...
I came across this circuit that sparked an idea for an old project...
I have an "on-demand" hot water heater. It can take a while for the hot water to get to the bathroom tap. I wanted to add a warm water indicator.
12
13
190
Everyone watching
#USOpen2024
, close it.
THIS is an electronic circuit. The chip is the famous LM555. Its super popular for flashing LEDs!
I have made this super simple circuit with it and want to share how genuinely wonderful it is to make this stuff and watch it work.
16
15
197
This is cool, all the fets are in sockets on the heatsink.
I can 'unplug' the heatsink with all the fets attached.
18
4
193
...
NOP
NOP
NOP
CALL 0x0742
CALL 0x14CB
...
Decoding binary by eye...
Does this happen to other people too when looking at binary dumps?
55
17
187
I have shoes on.. their just painted to look like bare feet..😅
"Set the mower loose!"
13
25
188
Technology levels:
Can it run linux?
Can it run doom?
Can it play bad apple?
Can it say Hello world?
Can it blink an led?
12
24
189
The obvious next question is:
Can the circuit be made to fit *here*
16
8
185
@shieladixon
Command line tools often trip up on spaces. In lots of situations command line is much faster to use than gui.
8
0
190
of course this is slowed way down cause its just a big mess of eye torture blinking at high speed.
2
0
182
I could be playing a video game, but no, I needed a boss that was a bigger challenge...
is there a cheat code for this?
18
15
179
@AwwwwCats
My cat routinely goes up and down this ladder to my shop roof, always catches visitors off guard. I can coax him down, can't prompt him to go up on queue.
2
16
177
Here is assembling source and uploading a hello world program for that 1 bit computer :]
55% of the program space! my largest program yet!!!
3
17
179
Rainy day schematic.
Voltage doubler, the inductor is a mains filter linked inductor.
:P
1
17
176
I been at this for years now, I'm giving up and buying a power supply from aliexpress :/
(@#$%@&@#$%)
18
10
174
I have updated the github repo with the source code and schematics for the encoder. I'm sorry I'm not going to tune this circuit. Please play with it yourself if you like.
serial->audio using an RC :]
8
20
179
I will update github diagrams and software for the 1 bit computer, the ALU will require a major modification to the assembler.
Its super cool to be able to just assemble and upload software to this thing, I love this!!!
3
16
168
1 bit computer with 9600 baud serial programming interface.
This schematic is on the border of too complex to be fit on a page of paper :/
I skipped most of the pin numbers because its going to get silly.
The 28C64 can be substituted for a 64k SRAM.
I dont think I made any errors
4
8
166
I am trying to continue the 1 bit computer work, and nothing is adding up. I think I'v found the corrected values for the encoding, but the wire-wrapped build is completely missing one of the 74595...
7
19
164
Here is one to help blow your mind
@ag88_
There is no sensor on this, the microcontroller is tracking the position by the backEMF of the motor.
I did not do as good a job as the Japanese person who inspired me to try (sorry I don't remember who you were!)
7
17
159
This is a display from one of the things I stripped down for parts recently.
11
1
160
A nice thing about a book is being able to trace the information source a bit.
"73 magazine, June, 1983 page 106."
5
18
163
A table, for makers. The surface travels quite slowly to the left, about 5mm per day. The left edge of the table empties into a tub.
10
22
160
