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# Pulse charging to constant flow Answered

So i had to replace the chargercable on our babycall and used a female usb port. The adapter uses 6 volts to charge the device but if i wanted to use a 5v portable charger, how can i make the current flow instead of pulsating? Capacitor? And what value?

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Not exactly sure what the question is here... Pulsating? Is your 6V pulsating? If so, how and why?

If you want to boost 5V USB to 6V, you need a DC/DC-Booster like https://www.aliexpress.com/item/4000498014482.html
Connect it up to USB, Measure the voltage and adjust the pot for your 6V Output. Then connect the load which wants 6V.

I am guessing your question about "flow instead of pulsating" [current] is the same topic Wikipedia calls "Ripple_(electrical)"

https://en.wikipedia.org/wiki/Ripple_(electrical)#...

The formula for choosing a filter capacitor, to reduce voltage ripple, is:

Vpp = I/(2*f*C)

where Vpp is the peak-to-peak voltage ripple (in V), I is load current (in A), f is frequency (in Hz or s^-1) of AC before it is rectified ( 2*f is frequency output from the rectifier), and C is the size of the capacitor (in F).

The section with that formula, is the one titled, "As a function of load resistance"

Sorry, but I fail to follow here.
If you need 6V to charge it then you can't charge it with just 5.