| Since the famous compass that Ampère christened a ‘galvanometer’, two successive types of voltmeter have held sway. The first of these combi...
More about Magnetic (154)
| A characteristic property of DC motors is that they can also act as generators, due to the complementary nature of Faraday’s and Lenz’s laws...
| If you’re short of inputs on your amplifier, but it has an input for a magnetic pickup with RIAA correction, this very simple project will l...
| The object of this circuit is turn the domestic lighting on and off in complete safety in a room with very high humidity. A detector, flush-...
| There’s no stopping technological progress, including Class D amplifier technology. New developments reduce the amount of electromagnetic in...
| If you fit a line of LEDs on a circular PCB and power them on continuously, they generate rings of light when the board is spun. If you add...
| Measuring angles has until now involved a choice between potentiometers and optical encoders. Potentiometers are inexpensive, but have the d...
| The sensitivity of a reed switch can be affected by the judicious nearby placement of small magnets. Also, reed switches exhibit a certain a...
| To measure the time taken by the wave to reach it, the GPS receiver compares the transmission time (included in the signal) and reception ti...
| Electronics is the wave of the future. Just about anything you can think of appears to be technically possible. However, there are a few pot...