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How to make a charger with automatic cut-off for 12V PB batteries. (Maks 7000Mah battery)
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MUSTOOL MT8206 2 in 1 Intelligent Digital Oscilloscope Multimeter
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DANIU PX-988 90W Digital Thermostat Adjustable Iron Soldering
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WARNING: This circuit is for hobby purposes. Its work has been tested, but no long-term repeated tests have been performed.
Charging has the usual risks. Use of this circuit is at your own risk.
Necessary Materials:
5 * 1N5408 Diode
4 * 1N4007 Diode
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1 * 1K 1 / 4W Resistor
1 * 6.8K 1 / 4W Resistor
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1 * 100R 1 / 4W Resistor
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1 * 0.85R 3W or 2W Resistor. (1R available. Charging slows down a bit.)
1 * 10K Trimpot
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1 * 4.3V 1W Zener Diode (or 4.7V)
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1 * 3300uF 25V Capacitor (or 4700uF)
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1 * 10uF 35V Capacitor
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1 * BD139 Transistor
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1 * 12V Relay
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1 * 5mm LED Red
1 * 5mm LED Green
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1 * 12V Buzzer
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1 * 1A Fuse
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1 * PCB Terminal Block
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Digital Multimeter: www.banggood.c...
Solder iron welding:
Digital Thermostat Adjustable 90W: www.banggood.c...
Digital Thermostat Adjustable 80W: www.banggood.c...
1 * 12V Min 16VA Transformer
Soldering Iron Stand: www.banggood.c...
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Circuit diagrams: bit.ly/2TBuKe1
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