- #1
badaboom
- 23
- 0
So I've made a circuit that lights up a light bulb whenever it's dark. I did this using a photoresistor and it is working. However, I have a relay switch with a 9V battery and a 7.2V lightbulb. When it was supposed to turn on, it lasted a couple of minutes and the battery is now dead. Should I place a resistance in that circuit so it lasts at least an hour? If so, what should I add?
Thank you
Thank you