If you try to measure the current with a blown fuse, you'll probably notice that the meter reads '0.00' and that the system doesn't turn on like it should when you attach the multimeter. Now what? Well first, remember that measuring current is done in series (interrupt the VCC line to the breadboard or microcontroller to measure current). It will happen in a split second and without any real audible or physical indication that something is wrong. As the current rushes through the multimeter, the internal fuse will heat up and then burn out as 200mA flows through it. This will immediately short power to ground through the multimeter causing the bread board power supply to brown out. One of the most common mistakes with a new multimeter is to measure current on a bread board by probing from VCC to GND (bad!). ![]() ![]() Share on Twitter Share on Facebook Pin It Changing the Fuse
0 Comments
Leave a Reply. |