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Raspberry Pi For Beginners: LED Connections, Bread-boards, and Programming

After seeing a couple of posts on Reddit asking for the proper way to connect LEDs to a microcontroller/microcomputer via GPIO, I decided to make this video.   This should guide you through how a breadboard is setup, how connections work for the Raspberry Pi, how LEDs work (generally), and how to create and execute a small bit of code to tie all of this together.  

Common Soldering Mistakes | Soldering

I have here two different pieces of copper that are from a standard [inaudible 00:09] power supply. One common soldering job might be to put a connector on something like this.   This piece of wire has been stripped and sitting out in the air for a long time and I wanted you to see how it looks when compared with something that’s just recently stripped. And holding them side by side, you can see that the one in my right hand is much, much cleaner and shinier. It has a pinkish appearance of nice, clean copper whereas, the one…

How to use gas sensors with Arduino || Arduino tutorial

In this tutorial I’m demonstrating how to use MQ-2/MQ-5 gas sensors with Arduino. These little devices may be used in gas leakage detectors. The MQ-2 is suitable for detecting LPG, i-butane, propane, methane, hydrogen and even smoke. The MQ-5 detects LPG, natural gas and town gas.   Many other gas sensors can be used in exactly the same way, e.g. MQ-3, MQ-6 or MQ-135. Just read the datasheet, use the appropriate load resistor and experiment with the “sensorValue” in my Arduino code.  

Smoke & Gas Sensor for Electronics Projects- MQ2

This project uses an Arduino NANO and a Nokia 5110 LCD screen for measuring and displaying levels. It would may a nice and simple smoke detector or alarm project.   I think this might be a good sensor for home automation projects and many other uses. You only need one pin to accept the output from the sensor so it will fit nicely into many electronics projects.  

Thermistor for measuring/controlling temperature

All about thermistors for measuring and controlling temperature, including how to use the thermistor that’s in an automobile coolant temperature sensor. I talk about the difference between Positive Temperature Coefficient (PTC) thermistors and Negative Temperature Coefficient (NTC) thermistors. I talk briefly about my experiment to test if cold water boils faster than hot water and then talk about the effect of the thermistor’s changing resistance on the electrical current running through a PC fan, to turn the fan on and off. I go over the electrical circuit for it in detail, including the homemade power supply, thermistor, PC fan and…

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