quiescentcurrent

joined 1 year ago
sorted by: new top controversial old
This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 2 points 3 days ago

I have one of those, it may pass as the great grandfather ;)

This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 1 points 3 days ago

They actually renamed the types which makes everything even more confusing

This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 2 points 3 days ago

Yeah, unfortunately fast data and fast charging are two independent characteristics...

This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 1 points 3 days ago

The thing is from Austria though?

346
This little gadget to find out which type of USB-C cable you have (discuss.tchncs.de)
 

cross-posted from: https://discuss.tchncs.de/post/22828099

USB was supposed to rule them all but it's now a mess of standards sharing the same connector. Different speeds, voltage, charging protocols, alt modes, even the number of pins used is variable.... For those asking, the thing is available on Kickstarter

This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 4 points 2 weeks ago (1 children)

Pretty much. I'm not even sure if regular USB ports can talk to pins individually, let alone test them for shorts.

This little gadget to find out which type of USB-C cable you have in c/[email protected]
[–] [email protected] 7 points 2 weeks ago (5 children)

Interesting, I just uploaded the .mp4 directly to lemmy and assumed this to be working. How else would you share a gif/short video?

182
This little gadget to find out which type of USB-C cable you have (discuss.tchncs.de)
submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]
27 comments fedilink
 

USB was supposed to rule them all but it's now a mess of standards sharing the same connector. Different speeds, voltage, charging protocols, alt modes, even the number of pins used is variable.... For those asking, the thing is available on Kickstarter

1
This tool for finding bad USB-C cables (hackaday.com)
 

EEVBlog also talked about this in a mailbag episode: https://www.youtube.com/watch?v=rEZQvSgdA2k&t=1839s

And they also have different cable versions available: https://caberqu.com/

1
Shift register missing bits (discuss.tchncs.de)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
0 comments fedilink
 

Hey friends,

I have a two daisy chained shift registers (74AHC595) which are controlled via an ESP32. I want to set one output to high at a time before switching to the next.

The code seems to work, but the outputs O_9 and O_10 are not staying high (zoom) after setting them, whereas all the other ones are working fine. This is the used code snipped:

pinMode(SHIFT_OUT_DATA, OUTPUT);
pinMode(SHIFT_OUT_CLK, OUTPUT);
pinMode(SHIFT_OUT_N_EN, OUTPUT);
pinMode(SHIFT_OUT_LATCH, OUTPUT);

digitalWrite(SHIFT_OUT_N_EN, LOW);

uint16_t input_bin = 0b1000000000000000;

for(int i=0; i<17; i++){

    byte upper_byte = input_bin >> 8;
    byte lower_byte = input_bin & 0x00FF;

    digitalWrite(SHIFT_OUT_LATCH, LOW);
    shiftDataOut(SHIFT_OUT_DATA, SHIFT_OUT_CLK, MSBFIRST, lower_byte);
    shiftDataOut(SHIFT_OUT_DATA, SHIFT_OUT_CLK, MSBFIRST, upper_byte);
    usleep(10);
    digitalWrite(SHIFT_OUT_LATCH, HIGH);

    delay(10)
    input_bin = input_bin>>1;
}

Is there anything I'm doing wrong, or any idea on where the problem may lie? I've already tried looking for shorts and other error sources, but the design was manufactured on a PCB and no assembly issues are noticeable.