bogdan
- 10th September 2009, 03:43
I have spare ports (CCP / ADC) on my pic16F913 and i was thinking to use them to charge the NiMH battery (Energizer NH22-175 "9V" / 175mAh) http://data.energizer.com/PDFs/nh22-175.pdf.
Following the Microchip AN960 (http://ww1.microchip.com/downloads/en/AppNotes/00960a.pdf) and Panasonic (http://http://www.panasonic.com/industrial/battery/oem/images/pdf/panasonic_nimh_chargemethods.pdf) i draw the charging flowchart:
...see the atachment
...so, the battery have to be charged in 3 modes :
-transition charge current = 44mA
-fast charge current = 175mA
-trickle charge current = 8mA
I found this circuit http://www.angelfire.com/electronic/hayles/images/figure3.gif on the internet but i have hard time to understand it (change it)... please help.
Thank you.
Following the Microchip AN960 (http://ww1.microchip.com/downloads/en/AppNotes/00960a.pdf) and Panasonic (http://http://www.panasonic.com/industrial/battery/oem/images/pdf/panasonic_nimh_chargemethods.pdf) i draw the charging flowchart:
...see the atachment
...so, the battery have to be charged in 3 modes :
-transition charge current = 44mA
-fast charge current = 175mA
-trickle charge current = 8mA
I found this circuit http://www.angelfire.com/electronic/hayles/images/figure3.gif on the internet but i have hard time to understand it (change it)... please help.
Thank you.