New answers tagged

0

The previous calculations of 76 mF are reasonable -- if the capacitor is charged to only ~ 6 V, but basically you need to store a certain amount of energy -- 1.2 W for 500 ms == 0.6 mJ. You could store this in a high V capacitor (say 16 V) and use a DCDC converter to convert that to a voltage that can drive the solenoid (say 4.5 V). Now, the 1.2 W doesn't ...


1

The conservation of energy with matched C energy is what you stated that we recognize. But maximum power theorem dictates transfer efficiency will be 50% if (real part of ) impedances are matched. But here there is reactive energy transferred. You don't always want to transfer the most power in the fastest time,T , but here the time is given as 1.2W for ...


0

I'd like to ... be able to use the load while the battery is charging. You're overthinking it. You already have all you need. You don't need to change any components. What you have will already let you use the battery while it's charging. At any given time: If the load is using less current than the charger can put out, the battery will charge If the load ...


0

After reading the post you have linked i think your drawing is correct, at lest if you connect zeners in the right direction, and without schematic we cannot evaluate. The zener 3 (orange) is connected between the source of power that power the TP4056 (let's say for example a lab power supply), and should be forward biased towar right direction. I'm ...


Top 50 recent answers are included