 |
 20pcs 9 volts cell plug sockets Box battery holder $8.36 Time Remaining: 3d 4h Buy It Now for only: $8.36 |
 30pcs 9 volts cell plug sockets Box battery holder $10.36 Time Remaining: 29d 4h Buy It Now for only: $10.36 |
 100pcs 9 volts cell plug sockets Box battery holder $31.50 Time Remaining: 1d 4h 11m Buy It Now for only: $31.50 |
 Lithium AA AAA 9V Cell Battery Volt Power Indicator Tester Batteries Checker $3.45 Time Remaining: 4d 22h 57m Buy It Now for only: $3.45 |
How do you tell how many volts a photo cell, or photo resister can take?
and it is not on the back of the box.
i mean how many volts can it take at max.
A photo cell and a photo resistor are 2 very different things, but these expressions are often mixed up....
A photo cell doesn't "take" volts, it "generates" volts.
A photo resistor (LDR) is like any other resistor, with the difference that it changes its Ohm value with the amount of light shining on it (reverse proportional). Its limitation is not the Volts "it can take", but the Watts it can handle = Volt * Current, like any other resistor. Ideally, you should know the model number of the LDR and look-up the allowable power dissipation in its data sheet.
Normally, those things have between 50 and 100 mW
NEW CELL & BUBBLER