This is a two tone door buzzer, which is an electronic buzzer types,but them has melodic sound than the general electric bell. Which many people have seen the two tone bell sounds from other electronic journals.
But they are circuit that made no who apply them, since Problems three reasons:
1.First, while do not press a switch, the circuit also still have a lot of current consumption around up to several tens of milliamperes.
If will make on-off switcher, a power supply of circuit will must add other one switch individually. When we will press the buzzer we must press the other switch before, then when press completely the buzzer switch, we must close power switch again. To set to application as begin.
2. Secondly, the output sound is real two level. But the sound is vibrant and clear.
3. Thirdly, Suppose that solving the problem on-off switch,with replace an old battery with a DC adapter to circuit.
But they are circuit that made no who apply them, since Problems three reasons:
1.First, while do not press a switch, the circuit also still have a lot of current consumption around up to several tens of milliamperes.
If will make on-off switcher, a power supply of circuit will must add other one switch individually. When we will press the buzzer we must press the other switch before, then when press completely the buzzer switch, we must close power switch again. To set to application as begin.
2. Secondly, the output sound is real two level. But the sound is vibrant and clear.
3. Thirdly, Suppose that solving the problem on-off switch,with replace an old battery with a DC adapter to circuit.
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