Electronics > Projects, Designs, and Technical Stuff

Using jumpers to quickly swap components

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HendriXML:
Hi,

Did a quick experiment on how to use jumpers to make resistors (or other components) swappable, to enhance the joy and speed of experimenting on a perfboard.
It needs a bit more spacing because of the 2x2 headers.
But compared against using crimped/soldered dupont connectors they are handier.

* Using the test perfboard you get a "third hand"
* No need to crimp
* Good orientation
* Spacing is accurate
* Easy to have different spacings
* Easy to swap
* Shorter “legs”
* More isolatedI measured the voltage drop of (2) it was 17.9 mV at 3.2A making a resistance of 5.6 mOhm.
The used wire in between dropped 0.9mV so it had a resistance of 0.3 mOhm.
Thus the jumper connections are about 5.3 mOhm.

Good enough for a lot of applications!

While soldering some care has to be taken not to solder to the header.
 

magic:
Pro tip: check out SIL/SIP sockets.

HendriXML:
They’re on order. Had previously only bought one strip. That one I used as a tiny breadboard  ^-^. Handy stuff.

Maybe I will do a comparision, but I don’t think the tick wire will fit  :-+

Ian.M:
You can also cut up turned pin IC sockets if you don't have any SIL turned pin socket strips handy.   For components with a similar lead diameter to the turned pin pin, if the lead is cut cleanly it will plug straight in.  If there is a moderate diameter mismatch, solder the lead into the socket side of another turned pin socket and use the pin side as a plug.

T3sl4co1l:
IC sockets may be a bit too tight, in which case the next best (top best??) option would be Mill-Max headers/sockets, available in all sorts of sizes.  Pricey as frig though.

Plain rectangular spring contacts would be fine (how solderless breadboards do it), but they don't seem to be as available, with contacts sprung for small minimum diameter leads.  Regular 0.025" square pin header sockets are pretty wide open, not good for much besides square pins.

I've done it that way too, with a socket header in the board and components soldered to pin headers.  Not as freely pluggable as random proto-bin components (need to prepare a component+header assembly), but alright when you have just a few combinations to try.

Tim

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