Not sure why this doesn't work correctly (ignore the red wire it is actually grounded to an Arduino Uno R3)

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Not sure why this doesn't work correctly (ignore the red wire it is actually grounded to an Arduino Uno R3)

http://alleycat.synchro.net:81/images/ground_block.jpg

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Re: Common Ground Block
By: Mortifis to All on Sat Mar 07 2020 15:27:38

Not sure why this doesn't work correctly (ignore the red wire it is actually
grounded to an Arduino Uno R3)

http://alleycat.synchro.net:81/images/ground_block.jpg

What's it supposed to be doing and what isn't it doing? You should have continuity between any and all of those pins/wires. If not, the first thing I'd try would be to run it all down another column of the breadboard; those things aren't super rugged and it's easy to damage the sockets in them.

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echicken
electronic chicken bbs - bbs.electronicchicken.com
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Re: Common Ground Block
By: Mortifis to All on Sat Mar 07 2020 15:27:38

Not sure why this doesn't work correctly (ignore the red wire it is actually
grounded to an Arduino Uno R3)

http://alleycat.synchro.net:81/images/ground_block.jpg

What's it supposed to be doing and what isn't it doing?

It's supposed to be a common ground to extend the grounds of my Arduino Uno R3, I know, not very pretty. It seems to be not grounding properly which messes up the display on the 2x16 LCD making it display garbled characters

You should have
continuity between any and all of those pins/wires. If not, the first thing I'd try would be to run it all down another column of the breadboard; those things aren't super rugged and it's easy to damage the sockets in them.

I have the project using a long breadboard with +/- rails which works as expected, so, ya, it must be that little red breadboard, though the sockets seems tight, I'll pick up another one and see if the problem still exists

this is it working with a different breadboard, I though maybe the grounds were drawing too much power but wouldn't the power draw be the same?

http://alleycat.synchro.net:81/images/clock.jpg



Thanks EC

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Re: Re: Common Ground Block
By: Mortifis to echicken on Sun Mar 08 2020 12:18:59

this is it working with a different breadboard, I though maybe the grounds were
drawing too much power but wouldn't the power draw be the same?

If you're tying all of those ground points (on the red breadboard) to ground (eg. GND on the Arduino) through one jumper wire (that red one) there's a chance that jumper is undersized for the job. You could try running two jumpers from the red breadboard to your ground point (if possible, eg. two GND pins on the Arduino).

You could check for continuity between each of the pins/wires connected to the red breadboard. Your multimeter has a buzzer, so that'd make quick work of it. Per this pic:

http://alleycat.synchro.net:81/images/ground_block.jpg

Hold one lead to the end of the red jumper on the left, then tap the other lead on each of the pins on the connector up top. If you don't get a tone on green, yellow, red, and all three of the black wires, then you've got a break in your circuit. Could be the breadboard, a connector, a wire, or various combinations.

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echicken
electronic chicken bbs - bbs.electronicchicken.com
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Re: Re: Common Ground Block
By: Mortifis to echicken on Sun Mar 08 2020 12:18:59

this is it working with a different breadboard, I though maybe the grounds were
drawing too much power but wouldn't the power draw be the same?

If you're tying all of those ground points (on the red breadboard) to ground (eg. GND on the Arduino) through one jumper wire (that red one) there's a chance that jumper is undersized for the job. You could try running two jumpers from the red breadboard to your ground point (if possible, eg. two GND pins on the Arduino).

You could check for continuity between each of the pins/wires connected to the red breadboard. Your multimeter has a buzzer, so that'd make quick work of it.

Thanks EC, not too many ground points, it turned out to be a the red wire was bad.

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