Arduino Day 2017! over 23% off with $0.1 RGB Module, free shipping!!!

Dear customer, 

Arduino Day 2017 is coming! Get over 23% off for Arduino with $0.1 RGB Module.
2 New functions for your order: Check the tracking info on our site directly "Accounts/order history/view"; 
Choose DHL delivery on our site directly (if you need). Hope you like and welcome your suggestions!

Apply code: Arduino (35pcs limit) Ends on Apr.5th

Here some best sellers recommeation for you:

1) SIM800C GSM GPRS Module 

Description :

Power input: DC5V or received by a lithium battery input VBAT and GND.
Supports MCU level: 5V / 3.3V for TTL logic
(Such as the common 51 and the arduino is 5v. STM32 is the 3.3v)
Antenna use: IPEX antenna interfaces, you can use the version PCB antenna or antenna IPEX-SMA- peppers
5V: power supply pin, the only input DC5V, used to power the board.
V_TTL: access control board microcontroller core target voltage of 5V / 3.3V (according to its own microcontroller is much to distinguish kernel v), this pin is used to convert the GSM module board TXD and RXD for the corresponding TTL logic.
GND: power supply ground
TXD: send pin serial port module, TTL level (not directly connected to RS232 level)
RXD: receive pin serial port module, TTL level (not directly connected to RS232 level)
DTR: Data Terminal Ready
SPKP: Core Audio output pin
SPKN: Core Audio output pin
MICN: Core Audio input
MICP: Core Audio input
RI: Ring core pin tips
VRTC: RTC pin external battery
GND: power supply ground
PWR: This pin can turn down or turn off the module
GND: power supply ground
VBAT: lithium battery input pin, 3.3v-4.4v

project from https://www.youtube.com/watch?v=kJRuQrrMB-k

2) Nano Terminal Adapter Screw Shield 

3) DIY Secohmmeter Capacitance Meter 

Description
Parameters:
Board size: 6.8 * 8.5CM;

Various stalls Range Description:
Inductance measuring range: 0.1μH-------- 1H
Small capacitance measuring range: 1pF ------- 2.2μF (non-polarized capacitors)
Frequency Range: 20Hz ------ 400KHz (small signal can be measured)
Electrolytic capacitor measuring range: 0.5μF--12000μF (electrolytic capacitors)

View the project from https://www.youtube.com/watch?v=mjFC2RLD2LU

4) 60s Rotary Electronic Clock DIY 

Product Introduction:

1.Rotary electric clock is composed of SCM,power,display circuit,coding drive circuit,testing temperature circuit etc

2.Using 4 nixie tubes to display hour and minute;using 60 pcs LED rotating to analog second pointer walking;use key to adjust hour and minute;use key to set clock;room temperature testing and display function (digital temperature sensor DS18B20,can achieve high precise real-time display temperature.4-bit nixie tube will display once for every minute,the third bit display temperature value,and the fourth display temperature unit,60 pcs LED lighting tubes will ratating for a circle quickly)

3.Key Function:S1 (RESET)reset key;S2 (Alarm)set clock time (can only increase);S3 (Time)set and adjust real-time (can only increase)

View the project from https://www.youtube.com/watch?v=dd0zkZWDTj4