I’ve successfully made one but the time is about 2 seconds. My motor is powered by a 1s lipo. I tried four 240Kohm resistors in series and this gave me 20 seconds. It’s going to save me a lot of money on timers😀 Exemplary set of videos.
What components did you use? To get more time you need either: 1) A bigger capacitor (higher uF value) 2) A bigger resistor (more ohms) 3) More voltage in the zapper (up to the capacitor max voltage obviously) - check your 9V battery is fresh. The voltage in the circuit (ie 1S or 2S lipo) shouldn't make much difference providing you have a suitable FET.
I’ve successfully made one but the time is about 2 seconds. My motor is powered by a 1s lipo. I tried four 240Kohm resistors in series and this gave me 20 seconds. It’s going to save me a lot of money on timers😀
Exemplary set of videos.
What components did you use? To get more time you need either:
1) A bigger capacitor (higher uF value)
2) A bigger resistor (more ohms)
3) More voltage in the zapper (up to the capacitor max voltage obviously) - check your 9V battery is fresh.
The voltage in the circuit (ie 1S or 2S lipo) shouldn't make much difference providing you have a suitable FET.
My friend has had the same problem. No big deal. The timer is great with a bigger resistor and a 500k trimmer. I’ve made several now