If you were to ask a random Hackaday reader what their most fundamental piece of electronic test equipment was, it’s likely that they would respond with “multimeter”. If you asked them to ...
A multimeter has a dial surrounded by several symbols that identify electrical values. There are multiple ports for plugging ...
In short it set a new standard that controlled the many and varied modern devices that followed in the 1970's and later. Many engineers me included still have one and still make use of it.