There are two ways.
Each way has a positive, negative, ground. The
With a multimeter measuring time, red table pen is positive, black pen with negative, can measure the voltage.
What is this doing? Before the measured voltage is not one end of the positive, one end of the ground, can be measured without voltage, how is it? The The
I used a double-ended op amp and found that the output did not respond (I measured the op amp's output and ground). To check the power, this time depressed, and I thought that the positive side and the ground is positive voltage, measured negative and ground is the negative voltage.
The circuit has trouble chanting, to float it now. Or the way you are looking for.
Positive and ground is positive voltage, measured negative and ground is negative voltage. it is necessary
