I want to design a diode that lights up when the light is dark. Here I use a potentiometer instead of a photoresistor.
I think whether it is connected in series or in parallel, when the resistance is increased, the total resistance increases, so the total current
It is reduced, do not know how to design?
Tavia ポストする November 5, 2020
The classic circuit of NE555 is not enough.
Watson ポストする November 5, 2020
Are there simple ones that don’t need to be too complicated?
Lenox ポストする November 5, 2020
A fixed resistor is connected in series with the photoresistor, and the voltage divider controls a triode or MOS tube to switch the LED.
Ekaterina ポストする November 5, 2020
It needs a triode, otherwise it is a very rough design, the current is so small that no light can be seen, in fact, there is still power consumption, and electricity costs money.
