Is it safe to use wall transformers for a breadboard power source?

Hello, I am just wondering whether or not it is safe to use a wall transformer (9v, 300mA) to power breadboard circuits. What is the limit of amps as well as current that can be safely passed through a normal breadboard?

Also, is this a safe amount to be working with?Is it safe to use wall transformers for a breadboard power source?I use "wall-warts" all the time in breadboard projects. Make sure you put a voltage regulator circuit inline because the voltages that come out are usually noisy and higher than you want. For example, I have a 120V@60Hz to 12VDC wall transformer that is actually 15.3VDC RMS and when put to an oscilloscope, the voltage ranges from 13-16V. Since I usually bring it down to 3.3V or 5V with a regulator and filter anyway, that doesn't matter.Is it safe to use wall transformers for a breadboard power source?9 Volts AC is a safe voltage to work with. You wouldn't have any safety issues with voltage until you were above 40-50 Volts. Make sure you can't make contact with the wires on the 120 Volt side.



Couldn't find any info on what the Amp rating of a breadboard is. The nominal wire size of the holes in the breadboard is 22 AWG, the ampacity of which is 5 Amps, so you very definitely wouldn't want to exceed that. I'd stay below 1 Amp for safety. Most electronic circuits wouldn't have currents this high anyhow unless you're constructing a high power amplifier or suchlike.Is it safe to use wall transformers for a breadboard power source?Completely safe. Don't worry about it.

A normal experimenter breadboard will normally handle several amps.Is it safe to use wall transformers for a breadboard power source?
I'm not sure what you mean by a wall transformer so I will not attempt to answer that, however the breadboard sets no constraints on current as it is an insulator. You might ask what is a safe voltage for breadboard but that is irrelevant as it will be able to withstand much higher voltages that you can!



If you keep to 20 Volts you will have nothing to worry about. The worst you will see are some sparks if you short out a large capacitor.