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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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0
Orngrimm
Orngrimm

6 days ago

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.

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Jack A Lopez
Jack A Lopez

8 days ago

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"

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Downunder35m
Downunder35m

8 days ago

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