An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual 4-watt amplifier. One of the oscillators, pins 1 to 6, contained in U1 produces the upper frequency signal of about 200 Hz, while the second oscillator, pins 8 to 13, provides the lower frequency signal of [...]
Car Burglar Alarm timer alarm system circuit , model to economize. This circuit convenients for to set up in an automobile. usually switch at set up keep with automobile door will the circuit closes. But in case of car owner opens in and out while note as a result [...]
When car thieves are scoping out prospective targets, sometimes all it takes is the appearance of an alarm system to deter them… and its certainly a heck of a lot cheaper than the real thing! With this nifty kit you can put your own “dummy” alarm together to save yourself some cash, and maybe your [...]
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