hi, im gems. im new in this forum i just have a problem with my project auto ranging multi-meter. In order to have an auto ranging, i use transistor as a switch.the base is connected to pic output, the collector is connected to the voltage im measuring, and the emmiter to ground. my input voltage is ranging from 0-250V, the problem is when the pic output is 5v the transistor doesn't triggered. i need any suggestions of what might be the possible device i may use as a switch. some says its very dangerous both to the PIC and the user.
Please help me...
Please help me...