Electronics > Projects, Designs, and Technical Stuff
Professional Prototyping Hardware Defined (Breadboard, Jumpers, low R stuff)
Mecanix:
Failed to find a dedicated prototyping section on the forum so I'll just ask here;
What defines 'professional grade hardware' when it comes to breadboard and jumper wires construction? So far I've only managed to get rip'ed off by so many sellers who've claimed having the hardware I was looking for to end up with a whole lot of non-recycle waste. From severely warped Bboards, steel contacts that, well, doesn't contact up to Rs0.7Ω between 4 holes on the LCR, etc etc. Not going to get into the badly crimped Dupon jumper leads with probably fake AL core and oxidized connectors (Rs0.235Ω/50mm, wtf!). /rant_over, thank you!
My current solution: I've managed to find 1 seller (one, literally) who have "true" phosphor bronze contacts with a surprisingly consistent spring action all across holes (round they are) with fair Rs and Cs results. For the jumper leads I have a feeling I have no other choice but to make them myself out of some single core tinned oxygen-free copper wiring and terminated with a machined gold plated pin (Rs0.012Ω/50mm).
So... how do "you" do it? Please share because not only I'm wasting a whole lot of time sourcing rubbish (just so I can test them, because sellers don't), I can't seem to find anyone that sells "fully tested" and effective prototyping kits out there. Am I missing anything??
ps. I understand that prototyping on solder-less boards isn't exactly a 'professional' approach, but I seriously doubt any of you (us?) have any choice e.g. to rig a quick circuit simulation.
Ian.M:
You don't need OFC copper jumper wires, the minuscule conductivity improvement OFC copper provides over ordinary electrical grade copper is swamped by the contact resistance at the ends. Don't use 'Dupont' jumpers for on-board connections, only use them for external connections. For on-board connections use 24 to 26 AWG insulated solid-core tinned copper wire, cut to fit the specific circuit. Either make up your own' 'Dupont' jumpers, or buy them from a first world supplier, preferably one with a bricks&mortar presence on your continent, (ideally in your country), not from a far east eSeller. That way, QC becomes their buyer's problem, not yours.
Far east breadboards are a total crap-shoot and there's far more crap than gold (or even bronze )out there. There are a very few western breadboard manufacturers left. Its a fairly frequent topic here, see:
https://www.eevblog.com/forum/beginners/who-made-the-high-quality-breadboard/
https://www.eevblog.com/forum/chat/3m-breadboards-for-cheap/
https://www.eevblog.com/forum/testgear/what-is-so-great-about-3m-breadboards/
Mecanix:
Thanks for your input Ian. No surprise this is a recurrent topic and issue, we don't have anyone testing their (potentially garbage) BB and leads. No specs, Rs/Cs tests, no material properties, tolerance, nada, just nothing, just a "Buy my Holed and Oxidized garbage for a few bucks, gents". On the location comment, I did source from self-called reputable and professional sellers to find out most if not all source their stuff out of the great orient for cents and re-sell for dollars. Literally thrown away 20+ BB and 100's of dupon leads today... those same I sourced from these 'local' guys over the last 2~3 weeks.
I think the challenge is to find someone in that "Far-East" who actually manufacture quality prototyping equipment. The kits I have shown on those op's pics is in fact mfg in the far-east, so are those machined gold plated pins & tinned copper wiring I got. I'd share the contact but not here to "advertise". Feel free to do so if you know anyone who does test before selling prototyping kits, by all means!
Just curious as how you guys mitigate this (apparently recurrent) problem. This needs to be sorted out (I think). Ridiculous what we have access too... as if any bloody circuit will work or behave with the stuff I've received, what a mess lol. Just about okay for the led blinker, perhaps?
Mecanix:
Year 2020 and still having to cope with absolute garbage sold to prototype high tech stuff, what an embarrassment. Good god guys :--
Feel free to name & shame those who sells those few bucks BB and oxidized fly leads, this sh*t needs to stop. Wasted literally 20~30 hours trying to get a "half-functional" kit. Not a $ issue, at all, that time guys...
MosherIV:
Sorry, cannot point you to suppliers other than RS or Farnell/Element14.
There is no need for prototype bread boards in commercial electronics development in most companies now. Most prototypes are 1st try pre-production PCBs. Has been like that at every company I have worked at for more than 15 years now.
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