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Broken Charger Connection Alarm
Terbaru 2017
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Broken Charger Connection Alarm
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link: Broken Charger Connection Alarm
Berbagi Broken Charger Connection Alarm Terbaru dan Terlengkap 2017
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| Broken Charger Connection Alarm Circuit Diagram |
or low dc voltage operated device. The circuit can safely operate over a 3 to 15V range and 1A max. Current, provided the supply voltage is about one volt higher than the voltage required by the load.
The circuit is inserted between the supply and the load; therefore, until a trickle-charging current of at least 100µA is flowing towards the load, D1 and D2 will conduct. The forward voltage drop (about 1V) available across the Diodes drives Q2 into conduction and, consequently, Q1 will be cut-off. If no appreciable load is connected across the circuit’s output, Q2 will become cut-off, Q1 will conduct and the Piezo-sounder will beep.
Parts:
R1 = 10K
R2 = 1K
R3 = 1K
Q1 = BC557
Q2 = BC557
D1 = 1N4007
D2 = 1N4007
D3 = Red LED
BZ1 = Piezo Sounder
Notes:
- An optional LED and its series limiting resistor can be wired in parallel to BZ1, as shown in dotted lines in the circuit diagram.
- In this case you may omit the Piezo-sounder in order to obtain a visual alert only.
