Re: gEDA-user: buzzing board

[DJ Delorie <dj@xxxxxxxxxxx>]

> can you capture a current trace,  knowing that information will  
> provide us an ability to actually calculate the required capacitance.

10 ohm resistor between the LDO and the control transistor (LDO ->
resistor -> P-MOS -> cap -> OLED).

~300mV Vpp ripple across the resistor, 30mV to 300mV absolute.

That would be 3mA to 30mA

That's at 8.4KHz

It's not a sine wave; it's 15uS rise and 104uS fall.

Voltage at that point is 12.1v with 0.43 Vpp ripple.


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user