Do I need a solar charge controller for low watt/low battery voltage situations? This site says that they are generally not needed: http://www.solar-electric.com/solar-charge-controller-basics.html ...
I'm researching the feasibility of doing an art project that involves soaking up ambient RF power in a city (energy harvesting) and then playing a 1 second sound clip through a speaker as soon as ...
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 ...
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 ...
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 ...
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 ...