Search found 4 matches
- Mon Dec 31, 2018 7:31 pm
- Forum: DSO Shell
- Topic: Li-ion power mod
- Replies: 144
- Views: 251269
Re: Li-ion power mod
It is unpredictable and it will vary from unit to unit. Basically at around 7.5V, which could actually be 7.5V ±0.5V the +5V and the -5V regulators will stop regulating and then anything is possible. The problem is that at that point the scope will NOT just die but will stop functioning properly an...
- Tue Dec 25, 2018 9:00 pm
- Forum: DSO Shell
- Topic: Li-ion power mod
- Replies: 144
- Views: 251269
Re: Li-ion power mod
You are right that the undervoltage protection kicks in only well under 7.5V. I wasn't aware that the scope isn't functioning reliably below that, thank you for the warning! (Thanking also for those who might otherwise follow me in making this mistake.) I will definitely watch out for wrong readings...
- Mon Dec 24, 2018 7:04 pm
- Forum: DSO Shell
- Topic: Li-ion power mod
- Replies: 144
- Views: 251269
Re: Li-ion power mod
IMG_3971.JPG The side rim of the digital PCB had to be trimmed a little to make enough room for the hard paper backplate of the charge indicator. IMG_3959.JPG Detail of the rotary encoder PCB. To make sufficient room for the thickness of the cells, I trimmed the solder points as flat as I could and...
- Mon Dec 24, 2018 7:03 pm
- Forum: DSO Shell
- Topic: Li-ion power mod
- Replies: 144
- Views: 251269
Re: Li-ion power mod
In this and the following post (too many images for one) I would like to share my DSO150 battery mod using two lithium cells (without a voltage regulator), one module for battery protection, one for charging and one charge level indicator module. I haven't used the device heavily since I made the mo...