RTC Backup Battery Holder CR-2032 Issues
#2
(09-06-2016, 06:34 PM)steveslim Wrote: I have no electrical circuit experience, but have been trying to search on the web for answers (maybe "Electrical Circuits for Dummies" would help me?), but am having trouble, so I turn here for help.

The CR2032 is a 3 volt lithium ion coin cell typically used on computer mother boards to hold the RTC and CMOS.  

The RTC on the PineA64 requires 3 volts.  The CR2032 battery holder (with switch) is designed to hold two CR2032 cells (in parallel) so that the 'battery' provides 3 volts and 'twice' the available current (~450mah) of one cell.  In this configuration the plus(+) of each cell is tied together (on red) and the negative ( - ) of each cell is tied together on black.

If the cells are installed properly three volts +3v will be present on the plus (red) wire relative to the black (ground) wire when the switch is ON.  If the measurement across the red and black wire is either zero ( 0 ) or six ( 6 ) volts ( or if the polarity is reversed ) then the cells are inserted incorrectly. 

If six volts is plugged into the RTC connector, or if the polarity is reversed damage may occur to the RTC or to the Pine board in general.
marcushh777    Cool

please join us for a chat @  irc.pine64.xyz:6667   or ssl  irc.pine64.xyz:6697

( I regret that I am not able to respond to personal messages;  let's meet on irc! )


Messages In This Thread
RE: RTC Backup Battery Holder CR-2032 Issues - by MarkHaysHarris777 - 09-06-2016, 07:49 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  PineA64 battery in Germany (specifications or alternatives) burningkrome 0 3,090 12-02-2018, 04:10 AM
Last Post: burningkrome
  Lithion 3.7 volt PineA64 battery Model 9070120P MarkHaysHarris777 9 14,112 12-10-2016, 10:01 AM
Last Post: mcrognale
  Battery Backup for media center. Zone 4 8,167 09-13-2016, 09:08 AM
Last Post: MarkHaysHarris777
  Battery Power clackamas 3 7,148 06-13-2016, 02:18 PM
Last Post: clackamas

Forum Jump:


Users browsing this thread: 1 Guest(s)