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3 pin slide switch

SPDT Slide Switch 3 pin 30V

STM32F0 microcontroller and interface board top view

STM32 M0 MCU and Interface to Breadboard

Image of the Atmega324p


Serial to USB converter with Micro USB cable

USB to Serial Converter

Thumbnail: Crystal Oscillator 18.432 MHz for UART

18.432 MHz Crystal Oscillator 18pf 30ppm

Thumbnail: 22 pF Capacitor

22 pF Multilayer Ceramic Capacitor

Thumbnail: Quartz crystal oscillator - 16 MHz

16 MHz Crystal Oscillator 20 pF Through Hole

Thumbnail: 4x4 keypad top view.

4x4 Keypad with Adhesive Backing

thumbnail: 8 channel logic analyzer - iLogic

4 Channel Logic Analyzer

Thumbnail: quad buffer line driver 74HC126E

Quad Buffer Line Driver (Through Hole)


Breadboarding: Connecting a Relay to the Microcontroller (with Transistor, Resistor and Diode)

The pin of the microcontroller is connected to a transistor that will switch on the current that will fire the coil of the relay so the relay can switch on. The pin of the microcontroller has a resistor to the base lead of the transistor.

A protection diode is connected to the two leads of the relay coil to protect the transistor from a current spike from the relay coil. The diode is a signal diode 1N4001.

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