Circuit Project Electronic www.eleccircuit.com |
| Posted: 14 Feb 2013 02:03 AM PST My friends who live in California, USA, said that he likes to party with friends. With alcoholic beverages. And the need to drive a car. He does not want illegal traffic and to ensure the safety of everyone, so thought to buy this alcohol tester to the car. I agree. But he wondered how, Can we build it? I highly recommend this circuit. Advantage of it is easy to use, show the alcohol level with the 10 LED. Use the parts less. So is not difficult to build and cheaper. The working principle of the circuit. The heart of the circuit in Figure 1 is an alcohol sensor(sensor1), which features sensitive to the substances of alcohol. When we apply the power supply of 12 volts into point J1 then turn ON switch S1 to provided the voltage supply to this circuit. The voltage is maintained level of voltage constant of [...]  |
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