How should i get a proper current of 1Amp to 2Amp for GSM module 900A using a external power supply????
By buying and external power supply with 1A or 2A rating.
Perhaps we don't understand your question...
Actually My GSM module 900A is working fine using the power adapter. But it is not working using the a external power battery of 9v. So is there any solution for using the external power solution
Most of these newer modems draw about 300mA under typical coverage and operating conditions
- HOWEVER, they often pull full power during initial cell registration and audit after power-on, or in low signal coverage areas.
Your supply must be good for 1A continuous, and bursts of up to 2A.
OR soldering 1000uF(or 33000uF) electrolytic cap across power pins to your GSM,
Should be big enough unless a poor signal area. Not exactly elegant!
Will kick the psu at power on to charge that big fella!
Work out the power requirement over time, and you’ll know how well that will work.
Borish:
it is not working using the a external power battery of 9v.
You mean a PP3 size 9V battery? That's no surprise. Those batteries cannot provide more than 100~200mA, and will go flat very quickly. They are good for smoke alarms, nothing else.
Can u suggest me the best way to get the require power for both GSM module, Arduino and Ultrasonic sensor with an external power supply ? And i want to build my own circuit board for this power supply circuit. Can u suugest me the best way requirements for the circuit ??
Copy any known good reference design, ideally a small switching regulator - to provide the rails you need from the supply you have.