Hey, I fried one of my cables to a stepper motor(1 A), it happens in the soldering point between two normal jumper-cables, is there a way to test the quality of the solder, so this does not happen again ?
Thank you
Measure the resistance of the joint with a DVM.
Soldered joints usually don't break (unless you are talking about the wire just after the joint).
If you are soldering two wires together, the strands should be twisted together first. After soldering the solder surface should be smooth and relatively shiny. It should "wet" the wire strands. This is most easily seen if you clean the solder joint with alcohol before inspecting.
While a DVM will certainly show a very very bad solder joint I doubt it will find a marginal one.
If you are soldering to a lug or some such the same applies except the wire cannot be twisted but should be looped or in a "J" configuration and squeezed on the lug before soldering.
Adafruit as a article on soldering that might help Soldering
JohnRob:
While a DVM will certainly show a very very bad solder joint I doubt it will find a marginal one.
Joints should not be solder they should be mechanical, the solder should just hold them together.
Can you show a pic of your failed assembly
If you've fried a wire that implies a short circuit rather than a bad soldered joint...
Look carefully .
Allan
hauken_heyken@hotmail.com:
between two normal jumper-cables
Whatever that means. What are these "normal jumper cables" - if you mean the sort of breadboard
hookup wires sold on eBay, they are completely inadequate for high current, for instance.