To make an ammeter with an Apple Watch or smartwatch, you need to make a 'coil holder' for winding a coil using a 3D printer or similar and fit it into the center of the main body. jp3141 ...

In an inductance-measuring circuit (Figure 1 ), the NE555 connectsas an astable multivibrator oscillatorto produce a square wave of approximately50% duty cycle at frequencies ofapproximately 46 Hz, ...

You need to know how to measure the current that flows through a component in a circuit and the voltage across it. The ammeter must be connected in series with the component – remember, in a ...

The rise of renewable energy has put ammeter resistors back in the spotlight. This article explores ammeter-resistor operation and how to choose the right one for a particular application’s needs.

This eliminates the use of additional voltage regulators, and allows the circuit to work from 4.5V down to about 3.3V. Check the video after the break to listen to [Craig] describe how it works.