Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

SIM900 VDD voltage drop

Status
Not open for further replies.
H

happy_davood

Newbie level 1
Joined
May 14, 2010
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
IRAN
Activity points
1,286
Hi dears,
I have sim900 connected to Atmega64 . Everything is OK but some time sim900 turns off. I measured the VDD_Ext Pin it is 800mv instead of 2.9 volt. I am sure that power supply is OK and there is no voltage drop (because i measured by oscilloscope) . The power supply is 12 Volt regulated by LM2576 with 3A output current.

tanx
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top