Comments on: Small Breakout for SIM900 GSM Module http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/ Open source electronic projects Fri, 24 May 2013 17:17:00 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: BorisLandoni http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9496 BorisLandoni Wed, 15 May 2013 08:32:00 +0000 http://www.open-electronics.org/?p=1042#comment-9496 http://store.open-electronics.org/Arduino/Shield/GSM_GPRS_GPS_SHIELD

]]> By: BorisLandoni http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9492 BorisLandoni Wed, 15 May 2013 08:27:00 +0000 http://www.open-electronics.org/?p=1042#comment-9492 Hi the diodes aren’t mounter in our breakout. They aren’t necessary.

]]> By: TUSSHAR SAIGAL http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9490 TUSSHAR SAIGAL Wed, 15 May 2013 06:21:00 +0000 http://www.open-electronics.org/?p=1042#comment-9490 demo code for arduino or a library ???

]]> By: emaro http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9481 emaro Tue, 07 May 2013 22:15:00 +0000 http://www.open-electronics.org/?p=1042#comment-9481 hello, for esd protection you used TVS diodes, i can’t buy this type of diodes because of its non availability in shops. can i use zener diodes, ceramic capacitors ? if yes what do you suggest (with values), thank you ! :)

]]> By: BorisLandoni http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9479 BorisLandoni Sat, 04 May 2013 07:56:00 +0000 http://www.open-electronics.org/?p=1042#comment-9479 We use a special forniture, with DTMF decoder software, antijammer and cell locator.

]]> By: Sunny http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9476 Sunny Thu, 02 May 2013 15:15:00 +0000 http://www.open-electronics.org/?p=1042#comment-9476 Hi friends..we are the SIM900 completed mould distributor in HK and China.

Our MOQ is 1000pcs,update price is $10.5/pc ,anyone interested,please contact me by mail info@lyinternation.com and by Skype” sunnyleeyang”,hope to be partners to discuss the application of SIMcom mould..

]]> By: BorisLandoni http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9466 BorisLandoni Fri, 26 Apr 2013 15:10:00 +0000 http://www.open-electronics.org/?p=1042#comment-9466 Visit our store
http://store.open-electronics.org/Breakout/GSM%20Breakout

]]> By: cl1d3 http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9462 cl1d3 Thu, 25 Apr 2013 13:12:00 +0000 http://www.open-electronics.org/?p=1042#comment-9462 Is possible to buy completed module? If yes, what is price?

]]> By: Maurits Hartman http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9340 Maurits Hartman Thu, 28 Feb 2013 10:18:00 +0000 http://www.open-electronics.org/?p=1042#comment-9340 Thanks for the quick reply!

]]> By: BorisLandoni http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9339 BorisLandoni Thu, 28 Feb 2013 10:12:00 +0000 http://www.open-electronics.org/?p=1042#comment-9339 we use a transistor, you can also use a switch. So no problem. it Works without problem..

]]> By: Maurits Hartman http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9336 Maurits Hartman Mon, 25 Feb 2013 16:23:00 +0000 http://www.open-electronics.org/?p=1042#comment-9336 Hi,

I was just wondering about the circuit part that controls the on/off and reset pins. In the breakout, these are directly to the collectors of the transistors T2 and T3. In the SIM900 hardware design document (V1.01, page 23) however, there is a 1k current-limiting resistor between the collector and the pins. The document also mentions that the maximum current that can be drained is 0.3mA.

Shouldn’t your design be updated with these resistors? Or did you never had any trouble with it?

Maurits

]]> By: Bringing the Zach Morris phone into the 21st century - About all http://www.open-electronics.org/small-breakout-for-sim900-gsm-module/#comment-9324 Bringing the Zach Morris phone into the 21st century - About all Mon, 18 Feb 2013 17:15:41 +0000 http://www.open-electronics.org/?p=1042#comment-9324 [...] build is a 128×64 OLED screen that replaced the old seven-digit, seven-segment display and a very small GSM module. The ancient PCB was discarded and a new hardware revision was created in Eagle based on an [...]

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