Wiring 2N7000 AN10441 as Logic Level Converter for i2C Protocol Devices

Other micro-controller uses 5v as standard input voltage, many latest device modules, popular sensors, GPS, RF modules, Flash Memories, SPI storage, Display, use 3 to 3.3v  most of this devices requires logic level conversion to protect them from high voltage

Wiring a Digital Potentiometer with MCP4161

In this illustration we will going to wire a Digital Potentiometer using MCP4161. The MSC 7/8-Bit Single/Dual SPI Digital POT with Non-Volatile Memory. Required Components 1x MCP4161 1x 100K Ohms Resistor 1x 100nf Ceramic/Tantalum Capacitor MCP4161 Pin-Out Diagram  Wiring Diagram

Wiring the Relay Manually

In this illustration were going to wire a relay that can support any micro controller. Required Components 1x Relay 1x Diod 1N4007 1x NPN Transistor (2N2222) 1x 22k Ohms Resistor  Wiring the required components