Tagged Questions

2
votes
2answers
109 views

Need chargeable momentary 15 watt regulated voltage source

I'm working on a RF telemetry side-project that requires an amplifier IC to be run for about 5 seconds bursts between charges. The system is portable and runs off of a 3.3V battery that can supply ...
0
votes
1answer
91 views

What parameters affect battery charge time?

What parameters affect battery charge time? For example if we're interested in designing a charger for mobile batteries, what parameters should be considered? What happens if a little higher voltage ...
4
votes
2answers
432 views

Charging 35V 470uf capacitor with coin cell

I want to charge a 50V 470uF capacitor up to 35V with the smallest battery possible. Can a coin cell do this 3000 times? Possibly a 2450 or 2477 coin cell? Also, can the capacitor be fully charged ...
2
votes
2answers
170 views

Battery charge indicator LEDs

Many laptop batteries have a button on the bottom that will light up 1-4 LEDs to indicate how much power is remaining. I'd love to build something like that into my own device, which is powered by 2 ...