Abraxolotlpsylaxis
@abraxolotlpsylaxis.bsky.social
interested in interesting stuff.
if you look closely in the photo, the tape running direction is indicated with arrows on the tape. I have checked that twice, of course.
November 24, 2025 at 8:10 PM
if you look closely in the photo, the tape running direction is indicated with arrows on the tape. I have checked that twice, of course.
yes -- at least a screenshot of the two is shown on my webpage
bastelstube.rocci.net/projects/MBS...
I will translate the text into English if you like, but my Danish isn't fluent enough for technical content.
If you need more specific details, contact me directly via eMail.
bastelstube.rocci.net/projects/MBS...
I will translate the text into English if you like, but my Danish isn't fluent enough for technical content.
If you need more specific details, contact me directly via eMail.
Martin's Bastelstube: NeoPower
Martin's Bastelstube, NeoPower Motortreiber
bastelstube.rocci.net
November 3, 2025 at 7:10 AM
yes -- at least a screenshot of the two is shown on my webpage
bastelstube.rocci.net/projects/MBS...
I will translate the text into English if you like, but my Danish isn't fluent enough for technical content.
If you need more specific details, contact me directly via eMail.
bastelstube.rocci.net/projects/MBS...
I will translate the text into English if you like, but my Danish isn't fluent enough for technical content.
If you need more specific details, contact me directly via eMail.
it took a while, but now I have completed my "NeoPower" daisy-chainable DC motor driver (WS8211 + DRV8251)
bastelstube.rocci.net/projects/MBS...
bastelstube.rocci.net/projects/MBS...
November 2, 2025 at 7:02 PM
it took a while, but now I have completed my "NeoPower" daisy-chainable DC motor driver (WS8211 + DRV8251)
bastelstube.rocci.net/projects/MBS...
bastelstube.rocci.net/projects/MBS...
Now I have built the board: Here is version 4 in different views
November 2, 2025 at 6:21 PM
Now I have built the board: Here is version 4 in different views
bei mir so:
October 23, 2025 at 12:29 PM
bei mir so:
It gets no permanent damage, just switches off (in some cases the Pi will reboot immediately). Watch the YouTube video, it explains the effect very detailed.
October 18, 2025 at 1:28 PM
It gets no permanent damage, just switches off (in some cases the Pi will reboot immediately). Watch the YouTube video, it explains the effect very detailed.
When you document the results of your project, don't take a photo with Xenon flash! This will immediately switch off the Pi, because the power management chip (U61) is a bare chip-scale package that does magic things when exposed to intensive light.
youtu.be/SrDfRCi1UV0?...
youtu.be/SrDfRCi1UV0?...
EEVblog #716 - Raspberry Pi 2 Xenon Flash Problem Explained
YouTube video by EEVblog
youtu.be
October 18, 2025 at 5:40 AM
When you document the results of your project, don't take a photo with Xenon flash! This will immediately switch off the Pi, because the power management chip (U61) is a bare chip-scale package that does magic things when exposed to intensive light.
youtu.be/SrDfRCi1UV0?...
youtu.be/SrDfRCi1UV0?...
Ihr braucht keine Angst zu haben. Trump wird die Veröffentlichung solcher Studien demnächst verbieten. Dann ist alles wieder gut und wir dürfen weiterhin schamlos Erdöl verbrennen.
October 16, 2025 at 8:35 PM
Ihr braucht keine Angst zu haben. Trump wird die Veröffentlichung solcher Studien demnächst verbieten. Dann ist alles wieder gut und wir dürfen weiterhin schamlos Erdöl verbrennen.
Some years ago I built the same with an I2C controlled PWM chip and a different type of H-bridge, but the basic principle is the same.
bastelstube.rocci.net/projects/MBS...
bastelstube.rocci.net/projects/MBS...
October 6, 2025 at 4:38 AM
Some years ago I built the same with an I2C controlled PWM chip and a different type of H-bridge, but the basic principle is the same.
bastelstube.rocci.net/projects/MBS...
bastelstube.rocci.net/projects/MBS...
If you set the PWM to 60% (perhaps a bit less for safety), then the vibrator will most likely work fine without being overloaded. Just check the motor temperature when it has been running a couple of minutes.
October 5, 2025 at 8:52 PM
If you set the PWM to 60% (perhaps a bit less for safety), then the vibrator will most likely work fine without being overloaded. Just check the motor temperature when it has been running a couple of minutes.
not yet, I haven't got the PCBs produced up to now.
October 5, 2025 at 8:36 PM
not yet, I haven't got the PCBs produced up to now.
if the motor current is known and roughly constant, then a simple resistor would be enough. Perhaps it suffers from the power dissipation! If the current varies too much, take three silicon diodes in series, that's about 2.1 Volts dropped. Cheaper than a regulator, I assume.
October 5, 2025 at 8:35 PM
if the motor current is known and roughly constant, then a simple resistor would be enough. Perhaps it suffers from the power dissipation! If the current varies too much, take three silicon diodes in series, that's about 2.1 Volts dropped. Cheaper than a regulator, I assume.
I have designed a variant of this circuit that can be soldered directly to the back of a DC motor. With this board, you can simply daisy-chain all the motors on your roboter and control them with one single wire. Different motor types are supported.
October 5, 2025 at 8:10 PM
I have designed a variant of this circuit that can be soldered directly to the back of a DC motor. With this board, you can simply daisy-chain all the motors on your roboter and control them with one single wire. Different motor types are supported.
Your circuit can't change the motor direction. That's okay for a vibrator, but not for a robotic platform. I have chosen DRV8251 because it contains a full H-bridge in a compact package, it can be controlled with only two logic signals and it does the level translation to motor voltage internally.
October 5, 2025 at 7:58 PM
Your circuit can't change the motor direction. That's okay for a vibrator, but not for a robotic platform. I have chosen DRV8251 because it contains a full H-bridge in a compact package, it can be controlled with only two logic signals and it does the level translation to motor voltage internally.
Yes, it works well. The motors are running smoothly at a steady rotation speed (when the PWM ratio doesn't change), and when I change the PWM ratio, the motor rotation seems to increase in a linear ramp (not measured, just my perception from the sound they make). No tests under load so far.
October 5, 2025 at 7:52 PM
Yes, it works well. The motors are running smoothly at a steady rotation speed (when the PWM ratio doesn't change), and when I change the PWM ratio, the motor rotation seems to increase in a linear ramp (not measured, just my perception from the sound they make). No tests under load so far.
I can recall there were once RAM extension cartridges for the Commodore VC-20 with 3 (in words: three!) kBytes.
September 29, 2025 at 2:03 PM
I can recall there were once RAM extension cartridges for the Commodore VC-20 with 3 (in words: three!) kBytes.
Für unseren Use Case ist es halt wichtig, dass räumlich entfernte Familienmitglieder über einen privaten Cloud-Ordner neue Fotos hochladen können. Kann der von Amazon das auch?
August 19, 2025 at 7:43 PM
Für unseren Use Case ist es halt wichtig, dass räumlich entfernte Familienmitglieder über einen privaten Cloud-Ordner neue Fotos hochladen können. Kann der von Amazon das auch?
zu spät, jetzt habe ich mir schon einen selbst gebaut. 15" Monitor im Tablet-Format plus RasPi Zero plus 2 Meter Holzleisten.
August 19, 2025 at 7:39 PM
zu spät, jetzt habe ich mir schon einen selbst gebaut. 15" Monitor im Tablet-Format plus RasPi Zero plus 2 Meter Holzleisten.
... and the chip which is missing in the 18-pin socket, that's most likely also a PIC? With a specific programmer software on board, I assume?
August 6, 2025 at 4:23 AM
... and the chip which is missing in the 18-pin socket, that's most likely also a PIC? With a specific programmer software on board, I assume?
Da sieht man's mal wieder: überall machen diese Migranten Probleme!
July 30, 2025 at 8:04 PM
Da sieht man's mal wieder: überall machen diese Migranten Probleme!
-- nee, im Ernst: Das sind schon beeindruckende Bilder. Aber vielen Betrachtern ist nicht bewusst, wie riesig diese Ausbrrüche wirklich sind.
July 30, 2025 at 7:58 PM
-- nee, im Ernst: Das sind schon beeindruckende Bilder. Aber vielen Betrachtern ist nicht bewusst, wie riesig diese Ausbrrüche wirklich sind.