I am using sim800C its works fine with power supply but as I connect it to the battery it gets restarted.
I am using 3.5 V lithium battery and using voltage booster for getting 5V but as I made connections its gets restarts.
Please help..
I am using sim800C its works fine with power supply but as I connect it to the battery it gets restarted.
I am using 3.5 V lithium battery and using voltage booster for getting 5V but as I made connections its gets restarts.
Please help..
I am using sim800C...
I am not familiar with this LCD display. Please post a link to the datasheet.
I am using sim800C
isn't that an rf modem? So can we assume the LCD issue is solved, if so mark the solution and start a new thread.
Jim
Anurag_Maheshwari wrote:
I am using sim800C
isn't that an rf modem?
Yes - it is a GSM/GPRS module: http://simcomm2m.com/En/module/detail.aspx?id=74
So can we assume the LCD issue is solved, if so mark the solution
For instructions, see Tip #5
and start a new thread.
Even if the LCD issue is not resolved, the SIM800 is a separate issue - so start a separate thread for that.
You can always give a link back to this one, if appropriate.
what 3.5V battery and what booster? The sim800 needs 2+ Amps peak current depending on what it is doing - can your battery and 'booster' supply this? Most likely not which would explain your problem.
The sim800 needs 2+ Amps peak current
This is common to any GSM module - and, in fact, any radio transmitter - it is in the nature of the beast!
I did some measurements on a GSM modem years ago: http://www.antronics.co.uk/downloads/M1306B_Current_Traces.pdf
(as it's a modem - not just a bare module - it has its own internal power supply, which mitigates the issue. But you can still see the highly "peaky" nature of the current draw)
A very common problem when using GSM modules is inadequate power supply to cope with these peaks.
Study the manufacturer's documentation carefully - in particular, their power supply & PCB layout recommendations.
See: https://www.avrfreaks.net/forum/...
And: https://www.avrfreaks.net/forum/...
#GSMPowerSupply
can your battery and 'booster' supply this? Most likely not which would explain your problem
If you have an oscilloscope, look at the supply voltage to the GSM module - you will probably see it "collapse" as soon as the module draws its high current ...
This is (almost) certainly a General Electronics issue - nothing specifically to do with AVR.
I am not familiar with this LCD display
Because this was originally in a thread about an LCD: https://www.avrfreaks.net/forum/oled-lcd-12864-using-i2c-protocol-interfacing-atmega16
Hence also:
start a new thread
This is that new thread!
Brian Fairchild wrote:I am not familiar with this LCD displayBecause this was originally in a thread about an LCD: https://www.avrfreaks.net/forum/oled-lcd-12864-using-i2c-protocol-interfacing-atmega16
Hence also:
ki0bk wrote:start a new threadThis is that new thread!