dear sirs,
I need help with a project I am making. It is a solar LED light that turns on at night when the PIR sensor detects motion. Batteries are 2x 3.7V 18650. PIR sensor is a standard BISS0001. LEDs are 12x 5V and 5 extra LEDs, 10mm.
I connect the LDR with 2 npn BC547 transistors, and I have the result I wanted, the lights turn on at night. Then I connect the PIR sensor in the circuit, and with a tester I measure 3.03V in the output of the PIR.
The LEDs work but the light is low. It is not the same as if I connect the batteries directly to the LEDs. The voltage with NPN transistors is 3.52. The battery voltage is 4.2 volts when charged.
is it possible to increase the volt from pir to leds somehow?
thanks
I need help with a project I am making. It is a solar LED light that turns on at night when the PIR sensor detects motion. Batteries are 2x 3.7V 18650. PIR sensor is a standard BISS0001. LEDs are 12x 5V and 5 extra LEDs, 10mm.
I connect the LDR with 2 npn BC547 transistors, and I have the result I wanted, the lights turn on at night. Then I connect the PIR sensor in the circuit, and with a tester I measure 3.03V in the output of the PIR.
The LEDs work but the light is low. It is not the same as if I connect the batteries directly to the LEDs. The voltage with NPN transistors is 3.52. The battery voltage is 4.2 volts when charged.
is it possible to increase the volt from pir to leds somehow?
thanks
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