Electronics > Beginners
Voltage Drop at Breadboard
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Audioguru:
I gave up using solderless breadboards many years ago. Then I used stripboard with everything soldered and had no problems. The stripboards were neat and tidy with no messy tangled pile of wires all over the place and the strips of copper cut to length and a few short jumper wires formed the wiring of a pcb. If a part needed to be replaced then my solder sucker easily removed it. Most of my circuit designs were for audio or communications and were custom so only one or two needed to be made. My stripboards looked so neat and tidy that my prototype was usually sold as the finished product. Some were very complicated with many parts.
tggzzz:

--- Quote from: tooki on March 10, 2019, 02:02:40 pm ---
--- 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.

--- End quote ---

Just so :)

My agreement with the second sentence was a subtle dig at breadboards because of what I omitted to say. My longtime experience is that both cheap and expensive solderless breadboards are an unnecessary and unacceptable waste of time!
tooki:
Breadboards may be categorically unsuited to some types of circuits, but they're of incredible value to beginners especially. There's a TON of value in being able to quickly lash together a circuit and play around. It takes far longer to solder something together, and making changes are even harder still. I think you guys forget that breadboards are, above anything else, a learning tool — you guys are experienced and knowledgeable, but for those of us still figuring things out, breadboards are incredibly useful.

Just don't buy cheap!
tggzzz:

--- Quote from: tooki on March 10, 2019, 05:02:50 pm ---Breadboards may be categorically unsuited to some types of circuits, but they're of incredible value to beginners especially. There's a TON of value in being able to quickly lash together a circuit and play around. It takes far longer to solder something together, and making changes are even harder still. I think you guys forget that breadboards are, above anything else, a learning tool — you guys are experienced and knowledgeable, but for those of us still figuring things out, breadboards are incredibly useful.

--- End quote ---

True, they are a good way to learn about unexpected extra "components", and how to debug imperfect implementations (cf designs).
Zero999:
I'm not convinced the breadboard is this issue in this case. Whenever anyone mentions breadboard, there's always this discussion which is valid, but is also a distraction.

I'm more suspicions of the DC:DC converter.

anbudroid,
Did you measure the voltage directly at the DC:DC converter's input and output terminals on the board?
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