As we like basic electronic components over shield, in this guide we will use the hardware, not the shields. We can not give warranty of working about shields. Here is new test codes for Arduino temperature humidity sensor DHT11, DHT21, DHT22 test code for hardware (not shields). 2 libraries needed. Our old guides like DHT11 with TM1637 7 segment display will not work with the new libraries. DHT22 … [Read more...]
Arduino 8×8 LED Dot Matrix Display With MAX7219 : Code
Previously we shared many guides with TM1637 7 segment LED display. TM1637 was shown as it is mainly software based control, least knowledge on electronics needed. We actually discussed about MAX7219 in various articles like on increasing the number of pins of Arduino, This guide is on Arduino 8x8 LED Dot Matrix Display with MAX7219 code for testing for the beginners with one 8x8 LED Dot Matrix … [Read more...]
Which Size of Battery to Choose For Electronics Works : AA, AAA, D, C
Commonly available consumer grade batteries have many sizes like AA, AAA, D, C and all are of them are 1.5v but there are matters which need calculations. Which size of battery to choose for electronics works depends on how much load for how many hours we will put on them and how much current we want. This topic is one of the basic topic and for odd reason, AA batteries are more promoted in the … [Read more...]
How to Increase the Number of Digital Pins in Arduino (Port Extender)
13+6 pins often a limitation of Arduino in projects where we need many pins. Here is how to increase the number of digital pins in Arduino. You know that 13 pins are digital. 6 analog pins also can be used as digital in this way : [crayon-59eefc9fdd4e9586310343/] So actually we can refer Analog Pin 5 in this way : [crayon-59eefc9fdd4ef395244591/] Technically we can use the TX/RX. But TX/RX on … [Read more...]
How To Play MP3 On Arduino With No Shield, No SD Card
It is a suggested guide to try for learning the basic and understand which components needed for which work. Electronic components are essentially cheap and not everyone on this earth has huge money to spend to learn electronics. Here is how to play MP3 on Arduino with no shield, no SD card at lower bit rate for few seconds. What normally used for projects like our Arduino door bell is a buzzer. … [Read more...]
Linux-Based Embedded System Vs Microcontroller-Based Embedded System
We know that microcontroller can be programmed like we do with Arduino, also some micro controllers can run special versions of operating systems including Linux. or Run OS. What is Difference Between Linux-Based Embedded System Vs Microcontroller-Based Embedded System? It obvious that Linux system will be much more power hungry and not friend to battery, also may require cooling, and total thing … [Read more...]
Cheapest Way to Setup Raspberry Pi (Headless, Like Server)
Raspberry Pi with all needed things for GUI is no way cheap, indeed it is quite costly including all actually needed hardwares for general purpose use and increasing longevity of it. Case of Arduino is different as it is just a developmental board based on microcontroller. Raspberry Pi is a single board computer. Here is cheapest way to setup Raspberry Pi as headless like server to SSH & work. … [Read more...]
Arduino Fingerprint Scanner Module GT-511C3, GT-511C1R
Fingerprint scanners are definitely interesting but not many things are known these stuffs as Open Source hardware in this niche still quite less and the module is quite complex. Here is a guide on buying Arduino fingerprint scanner module GT-511C3, GT-511C1R buying guide and basic details to not get ripped off. GT-511C3 or GT-511C1R is the part number of the stuff - if you are lucky then it will … [Read more...]