LDR + resistor to differentiate between day and night (dark). LED + resistor. Arduino. Five parts plus the power supply. Does that constitute "the minimum number of components"?
Or are you after something sans Arduino?
LDR + resistor to differentiate between day and night (dark). LED + resistor. Arduino. Five parts plus the power supply. Does that constitute "the minimum number of components"?
Or are you after something sans Arduino?