Harrogate009 Posted December 22, 2014 Share Posted December 22, 2014 Anyone know how I could make up a charger to charge 8x 1.5V (Making 12V) 160mAh cells. They are wired together, to make one battery to power a smoke generator. Hopefully someone maybe able to help - No one I've asked so far can work it out. A little challenge, perhaps..... Jason. Link to post Share on other sites More sharing options...
cliff park Posted December 22, 2014 Share Posted December 22, 2014 You could use a car charger, keep it to a trickle charge to keep the current low. Otherwise you need a bit more than 12V, 14V or so and disconnect when charged. Almost certainly any 12V DC controller on max would work fine. Link to post Share on other sites More sharing options...
Suzie Posted December 22, 2014 Share Posted December 22, 2014 You will probably want 10 cells to give you 12V if they are ni-Cd or similar (more likely Ni-Mh). Typical safe charging rate is 10% of the hourly discharge rate for 14 hours, so you will want to charge them with a constant current of 16mA. The simplest charger is a constant voltage PSU with a resistor in series with the battery, so given that you will need a PSU with a voltage a bit more than 12V I would recommend you find an old 19V laptop PSU (or just borrow one when you want to charge) and use it with a 470R or 390R 1/4W resistor in series. If you want to be able to leave the battery on trickle charge use a 3K9 resistor instead, but charging time will be increased tenfold. Link to post Share on other sites More sharing options...
Crosland Posted December 24, 2014 Share Posted December 24, 2014 Anyone know how I could make up a charger to charge 8x 1.5V (Making 12V) 160mAh cells. They are wired together, to make one battery to power a smoke generator. You need to specify the battery technology. Andrew Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.