Sim900A Mini Wireless Data nsfer Module / SMS / Development Board / GSM / GPRS / ST2 Board Kit

1. Serial port circuit: TVS and ic bead protection devices are used to protect the board, so that the board will not be damaged by surges and high voltages. SIM card circuit: add SMF05C electrostatic discharge chip. circuit: Keep it short and sight, so as to ensure the signal strength.2. display: each interface is marked by silk screen, which is convenient for secondary development, and the design completely follows the SIM900A hardware design manual.3. All the way 5V power supply interface: We have made protection, even if the connection is red, it will not the board. The computer USB power supply is sufficient for the initial debuing of the computer; long-term data nsmiion requires a large amount of electricity, and we recommend a DC above 1A.4. One TTL interface: support 3.3V single-chip microcomputer and 5V single-chip microcomputer. In other words, it supports 51 types of 5V microcontrollers and ST2 microcontrollers.5. Two interfaces: SMA interface, IPX MINI interface (no welding). One 232 level interface: that means you can directly connect the module to the computer through a 232---USB serial line. It can also be connected to a computer via USB-TTL, depending on personal acceories.Model: SIM900APower requirements: 5Vsize:1 x 2cmMaterial:abscolour:Black+bluePackage Contents:1 x sim900a module1 x GSM module 1 x Module power cordOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.