power suply bob4

Anything about this unique oscilloscope DIY kit
stromar
Posts: 15
Joined: Tue Aug 29, 2017 5:26 pm

Re: power suply bob4

Post by stromar »

Where can i get this Calibrating C5 and C3. On forum. I loked i didnt found it.

Can you post a link.

Thanks.
stromar
Posts: 15
Joined: Tue Aug 29, 2017 5:26 pm

Re: power suply bob4

Post by stromar »

I loket at the bord, on my bord there is place for c3 but fizicaly c3 condenser s not there what this mean. There is empty space on that place.

What now?
stromar
Posts: 15
Joined: Tue Aug 29, 2017 5:26 pm

Re: power suply bob4

Post by stromar »

viewtopic.php?f=19&t=1108

( is this taht post you wont to llook)
stromar
Posts: 15
Joined: Tue Aug 29, 2017 5:26 pm

Re: power suply bob4

Post by stromar »

I have
C6 1pF value of capacitor
C4 3pF value capacitor

can i change C4 ( as changing C6) capacitor for 2 pf or 4 pf, becose i dont ow if femto farad capacitors exsist?
jye1
Posts: 1221
Joined: Wed Feb 20, 2013 4:58 pm

Re: power suply bob4

Post by jye1 »

This is the link

viewtopic.php?f=19&t=1108

Please note that the reference number for the capacitors are not the same for DSO068 and DSO Shell. You need to compare their schematics.
stromar
Posts: 15
Joined: Tue Aug 29, 2017 5:26 pm

Re: power suply bob4

Post by stromar »

I got from you new bob 3 board and i soldered it on the main board.
Vbus 5.07
V+ 4.901
Bob3 in 4.901
Bob out 0.000

Ok what now this is realy disturbing becose we changed bob3 board and now the same shit

Jp2 is open if i close jp2 then everthong is working

What now
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