Search found 6 matches

by LupinIII
Sun Feb 25, 2018 10:12 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184747

Re: Li-ion power mod

I just finished my battery mod. And because I found it easier to mount stuff I built a case out of wood ;) . I'm using one of those micro USB charger boards (with over charge and over discharge protection) and a boost converter with a chip labeled B6287. Both are available on ebay ( https://www.ebay...
by LupinIII
Sun Feb 11, 2018 3:47 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184747

Re: Li-ion power mod

LupinIII, how does your charger module handle running the scope while charging? Does it ever shut down charging while the scope is on? The one I have never shuts down because the current flow never goes low enough to trigger the shutdown. That could be a problem for the LIPO. The charger module not...
by LupinIII
Fri Feb 09, 2018 5:46 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184747

Re: Li-ion power mod

When the batterie full it consume 0.00028 A......OMG, my poor batterie :shock: Maybe that's because the resistor values you show in your image are weird and make it not work as intended? The principle of those 431 circuits is to short circuit the LED as long as the voltage is above a certain value....
by LupinIII
Fri Feb 09, 2018 5:28 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184747

Re: Li-ion power mod

So if there's no power at the barrel connector, turning the switch ON will turn everthing OFF. :-) But you can still charge the battery - it's just the converter that gets isolated. Then I have to see if everything will still fit with the barrel connector left in place. But I suspect there will be ...
by LupinIII
Wed Feb 07, 2018 3:58 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184747

Re: Li-ion power mod

This low battery indicator is a very bad idea, because it will drain the battery continuously itself (even when the LED is not lit).
by LupinIII
Thu Jan 11, 2018 3:01 pm
Forum: DSO Shell
Topic: C5 has no effect
Replies: 6
Views: 4546

Re: C5 has no effect

Although the square wave was fine for me to begin with (E version of the analog board), C5 does change the signal for me, but it is very subtle, if you have a full period of the square wave on screen. The change is about 2pixel in height visible for the first pixel of the corner of the square wave. ...