A Zener Diode with 6.8V and 2W.

Zener Diode 1W 3,3V.

Zener Diode with 12V and 5W

The GSM Module/GPRS based on the Simcom Arduino Shield module. The module allows you to obtain SMS, MMS, GPRS and Audio via UART commands by sending AT commands (GSM commands 07.07, 07.05 and simCOM enhanced with COM commands). The module also has 12 GPIOs, 2 PWMs and an ADC from the SIM900 module (they are all 2V8 logic) present on board.

This Silicon Diode (1N4148) has a fast switching speed, silicon epitaxial planar construction, lead free finish and it is RoHS compliant. 

This Power Diode (1N4003) contains a diffuse junction, high current capacity, low voltage, voltage overload at 30A, low reverse leakage current and has a lead-free coating, compatible with to RoHS.

This Rectifier Diode (1N4002) contains a diffuse junction, high current capacity, low voltage, voltage overload at 30A, low reverse leakage current and has a lead-free coating, compatible with to RoHS.

This Quartz Resonator features a frequency of 32.768kHz.

A Crystal Oscillator of Quartz 4MHZ

This Power Diode (1N4006) contains a diffused junction, high current capability, low forward voltage drop, surge overload rating to 30A peak, low reverse leakage current, lead free finish and it is RoHS compliant.

This Power Diode (1N4005) contains a diffused junction, high current capability, low forward voltage drop, surge overload rating to 30A peak, low reverse leakage current, lead free finish and it is RoHS compliant.

This Power Diode (1N4004) contains a diffused junction, high current capability, low forward voltage drop, surge overload rating to 30A peak, low reverse leakage current, lead free finish and it is RoHS compliant.