SIM900A GSM/ GPRS Module RGB Programmable LED It's self-powered

It's self-powered

where the end is passed through a buckle and fastened with a prong inserted through a hole in the strap

The control signals of the OUTWW

the first pixel collects the initial 24bit data then sent to the internal data latch

Positive of Rectified Output

SIM900A GSM/ GPRS Module RGB Programmable LED It's self-poweredSIM900A GSM Module is the smallest and cheapest module for GPRS GSM communication. It is common with Arduino and microcontrollers in most embedded Applications. The module offers GPRS GSM technology for communication with the use of a mobile sim. It uses a 900 and 1800MHz frequency band and allows users to receive send mobile calls and SMS. The keypad and display interface allows the developers to make customized Applications with it. Furthermore, it