TinyRTC I2C Module DS1307 + AT24C32N
- philwilkinson40
- Posts: 63
- Joined: Tue Nov 14, 2017 3:11 am
- Location: Perth, Australia
Re: TinyRTC I2C Module DS1307 + AT24C32N
similar but not the same!
Re: TinyRTC I2C Module DS1307 + AT24C32N
Judging from these schematics, another thing you could try testing continuity between the battery terminals and the DS1307 IC
https://robotdyn.com/pub/media/0G-00005 ... ATALOG.pdf
Pin 3 Vbat
Pin 4 GND
https://robotdyn.com/pub/media/0G-00005 ... ATALOG.pdf
Pin 3 Vbat
Pin 4 GND
- philwilkinson40
- Posts: 63
- Joined: Tue Nov 14, 2017 3:11 am
- Location: Perth, Australia
Re: TinyRTC I2C Module DS1307 + AT24C32N
continuity appeared fine.
With a more detailed search around I found others complaining of similar problems. In common with the author of the link, the D1 diode was defective on both my shields. I removed the diode and resistor R5 completely and the RTC module now works.
As the IC appears to be ok with the maximum output of the CR1220 I have no idea what the purpose of the diode and resistor are in the circuit.
Anyway, the issue was entirely hardware related so apologies to bother the author of this excellent driver!! Thanks Mike
With a more detailed search around I found others complaining of similar problems. In common with the author of the link, the D1 diode was defective on both my shields. I removed the diode and resistor R5 completely and the RTC module now works.
As the IC appears to be ok with the maximum output of the CR1220 I have no idea what the purpose of the diode and resistor are in the circuit.
Anyway, the issue was entirely hardware related so apologies to bother the author of this excellent driver!! Thanks Mike
- pythoncoder
- Posts: 5956
- Joined: Fri Jul 18, 2014 8:01 am
- Location: UK
- Contact:
Re: bizarre circuit design
I guess the diode protects against a reverse-fitted battery. What a revolting way to do it.
R5 only makes sense if they have shares in a battery manufacturer.
R5 only makes sense if they have shares in a battery manufacturer.
Peter Hinch
Index to my micropython libraries.
Index to my micropython libraries.