Schematics and components
Post date: Aug 10, 2016 4:29:19 AM
Schematic:
Schematic:
Description:
Description:
The voltage divider R5/LDR is saturating the base of a BC547 NPN transistor via R4.
According to the LDR datasheet when light condition is dark the resistance of the LDR is 500k Ohm.
R5=1.5 M Ohm and R4 1k Ohm should be enought to reach the 0.7V of the BC saturation voltage.
I plan to use 2 LED cut off from 12V LED strip, the resistor R3 is just for the schematic because those resistors are already inside the LED strip.
Components:
Components:
Resistor 1M Ohm
Resistor 1K Ohm
2 Led from Strip LED
Perfboard PCB
terminal 2P 5mm