thomaskwscott
- Nov 6, 2013
- 16
- Joined
- Nov 6, 2013
- Messages
- 16
Hi Guys,
I'm new to the forum and new to electronics in general so i may be making a few noddy mistakes but i was hioping someone could help out with general principles for a project i am working on.
I have one of those Android mini TV boxes that takes a 5V 2A power supply and i've mated it to a monitor and lcd controller board i have that takes 5-12V power. This all works great from a basic 5V 2.1A USB power supply that i have but i want to run it on batteries. I tried a 4.8V NI-MH battery (that was actually reading over 5V) and the screen flickered from what i think was under voltaging.
Looking for a solution to this i found Low Dropout Regulators and particularly this board:
http://www.ebay.co.uk/itm/190814696...eName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
This would allow me to use a higher voltage battery and get around my issues if i understand correctly?
If the above is true then I plan to use a 9.6V battery and charger like the one here to power everything:
http://www.ebay.co.uk/itm/181245672216?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
and this raises another issue with regards to charging, I want to be able to use the device whilst charging the battery. I have attached a small picture of my planned solution where in "charging mode" i introduce 2 voltage from both the battery charger and the original power supply for the device. The 5V power supply is introduced downstream of the regulator and is responsible for keeping things running during the charging process the 9,6V charger is responsible for charging the batteries only. My question is whether i have to take further steps to isolate the batteries in this example? In "charging" mode will my device attempt to pull power from the batteries as well and if so will this effect their charging?
Any help much appreciated
Tom
I'm new to the forum and new to electronics in general so i may be making a few noddy mistakes but i was hioping someone could help out with general principles for a project i am working on.
I have one of those Android mini TV boxes that takes a 5V 2A power supply and i've mated it to a monitor and lcd controller board i have that takes 5-12V power. This all works great from a basic 5V 2.1A USB power supply that i have but i want to run it on batteries. I tried a 4.8V NI-MH battery (that was actually reading over 5V) and the screen flickered from what i think was under voltaging.
Looking for a solution to this i found Low Dropout Regulators and particularly this board:
http://www.ebay.co.uk/itm/190814696...eName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
This would allow me to use a higher voltage battery and get around my issues if i understand correctly?
If the above is true then I plan to use a 9.6V battery and charger like the one here to power everything:
http://www.ebay.co.uk/itm/181245672216?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
and this raises another issue with regards to charging, I want to be able to use the device whilst charging the battery. I have attached a small picture of my planned solution where in "charging mode" i introduce 2 voltage from both the battery charger and the original power supply for the device. The 5V power supply is introduced downstream of the regulator and is responsible for keeping things running during the charging process the 9,6V charger is responsible for charging the batteries only. My question is whether i have to take further steps to isolate the batteries in this example? In "charging" mode will my device attempt to pull power from the batteries as well and if so will this effect their charging?
Any help much appreciated
Tom