Odysseas
Member
Hello everybody,
I am designing a circuit used for safe charging and discharging of a large capacitor (1F, 12V => automotive). An LED should indicate whether the cap is charged or discharged, i.e. I want it to stay on when the cap is being charged/discharged, and turn off once the cap is fully charged/discharged.
I've attached a basic idea, but I have no idea if it will work like that, this one is only for discharging. The idea is, when there is less than 0.7V applied to the +Cap terminal, the NPN should turn off, otherwise, allow current to flow through the LED (please excuse the missing pre-resistor
).
Please let me know your thoughts on this one.
Thanks!!
I am designing a circuit used for safe charging and discharging of a large capacitor (1F, 12V => automotive). An LED should indicate whether the cap is charged or discharged, i.e. I want it to stay on when the cap is being charged/discharged, and turn off once the cap is fully charged/discharged.
I've attached a basic idea, but I have no idea if it will work like that, this one is only for discharging. The idea is, when there is less than 0.7V applied to the +Cap terminal, the NPN should turn off, otherwise, allow current to flow through the LED (please excuse the missing pre-resistor
Please let me know your thoughts on this one.
Thanks!!
Attachments
Last edited: