All posts in the 'Battery Charger' Category


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Artificial Plate Battery

Posted on 21 Sep 2009

Artificial Plate Battery
Plate batteries for old tube radios are today only available with difficulty. However, step-up controllers for low DC voltages are everywhere. The circuits of these IC’s are, however, affected by disadvantages and complex wound inductances are needed. A further disadvantage of this solution is the transducer frequency; poor placing can cause audible interference.[more]

Posted in : Battery Charger | Power supply

Advanced USB Device Charger

Posted on 30 Mar 2009

Advanced USB Device Charger
This is a tiny USB battery charger.With this tiny thing you can charge almost all devices that are charged via USB, like iPods or mobile phones, with only two AA-Cells.most important compenent of the cicuit presented in the next steps is the “LT1301″. This is a small step up converter for to build switching mode power supplys with only a few external components.[more]

Posted in : Battery Charger | Power supply

Battery Charger for Hand Held Radio Battery Packs

Posted on 07 Nov 2008

Battery Charger for Hand Held Radio Battery Packs
This is a handy little charger that can provide a charging current of up to 120 mA continuously for batteries in the range up to 12 volts.The supply is housed in a small plastic enclosure 90 x 55 x 32 mm.[more]

Posted in : Battery Charger

LiPo element calibrator

Posted on 25 Sep 2008

LiPo element calibrator
The LiPo calibrator built is a very simple circuit based on the LM317, one resistor and one trimmer that can give a voltage from 4 to 4.5V. The trimmering range (around the point of start) should be minimezed in order to have a very good and easy adjustement with a standard multiturn trimmer. If the user has a very precise and stable power supply or another adjustable power supply (capable to be trimmered at 4.200V) it can be used to calibrate the LiPo balancer element.[more]


Posted in : Battery Charger

BattMan II: A Computer Controlled Battery Manager

Posted on 10 Sep 2008

BattMan II: A Computer Controlled Battery Manager
BattMan II is a computer controlled battery manager, intended for typical rechargeable batteries used by R/C and electronics hobbyists, as well as various consumer product batteries.BattMan II is a fairly complex project.It consists of five subsystems: power supply, current control, battery connection, voltage measurement, and logic power.[more]

Posted in : Battery Charger

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