Electronics > Beginners

Voltage Drop at Breadboard

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tggzzz:

--- Quote from: IanB on March 10, 2019, 02:15:17 am ---
--- Quote from: tggzzz on March 09, 2019, 11:06:02 am ---The problem is that you are using solderless breadboards. Inevitably you will spend more time debugging the breadboard than the circuit, due to variable and varying stray resistance, capacitance and inductance.

It is much easier to copy the masters, and use manhattan techniques or rat's nest techniques.

--- End quote ---

Wow, pessimist much?

--- End quote ---

Long experience, both mine and others. That probably means there's more realism than pessimism. Start by considering this thread, and look closely at the useful pictures the OP supplied!


--- Quote ---People have built whole working microcomputers on solderless breadboards with hundreds of jumpers. For simple, basic circuits breadboards are not that terrible.

--- End quote ---

...and then somebody sneezed.

You can go over the Alps/Rockies/Himalaya on a push bike - many people have done all of those. But expect to have to spend a lot of time fixing problems with the bike :)

tggzzz:

--- Quote from: anbudroid on March 10, 2019, 03:45:10 am ---am using single stead cable . but from scrap. I try with new one sir. I realise pre made jumper cable's are too thin and failed to conduct more current. is there any link for good quality cable ? ali express links is better for me to get

--- End quote ---

Even if you have good wires, you still have the problem of getting a good and reliable contact.

tggzzz:

--- Quote from: Jwillis on March 10, 2019, 04:01:43 am ---Using those cheap bread boards is fine.They work just as well as the expensive ones.

--- End quote ---

I disagree with the first sentence, but agree with the second.

windsmurf:
You might try multiple jumper cables for each connection to reduce resistance, if poor cable is the issue.

tooki:

--- Quote from: Jwillis on March 10, 2019, 04:01:43 am ---Using those cheap bread boards is fine.They work just as well as the expensive ones. Check that you have enough supplied current .

--- End quote ---
I'm the opposite of tggzzz: I disagree with both sentences.

Some cheap breadboards are fine, but others are awful. I've got some cheap ones that have several ohms contact resistance, which absolutely makes itself known in many circuits. Better cheap ones are sub-ohm, and top-quality ones just in the mOhms.

Given the issue of voltage drop here, I'd suspect that it's a cheap breadboard and contact resistance is adding up.

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