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Using Relays Hacks |
 | Build a Giant VU Meter Using Light Bulbs
Basically, a VU Meter measures loudness (volume units) of an audio signal. But this blinking VU meter project catches the eye more than the ear. The construction of the VU meter using 12 flashing bulbs is relatively simple. At the heart is a 12... |
 | Relay Tutorial: Control AC Outlets & Machines
Learn to control the power to a normal AC outlet using 5 volts DC. When dealing with low voltage electronics such as iPods or cell phones, it may seem hard to make the jump to AC powered, high voltage appliances and machines.ÂÂ For example,... |
