This is slightly difficult guide for the beginners as it involves soldering and wiring is complex. Here is detailed steps on how to for 1602A LCD display Arduino connection. In this guide we will also talk about the soldering part. The units do not cost more than 3 USD per unit but there is no in-built pins - usually male header pins supplied. We talked about different types of wires in … [Read more...]

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...]

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...]

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...]

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-69fabefd1e6c8484883106/] So actually we can refer Analog Pin 5 in this way : [crayon-69fabefd1e6cb646601587/] Technically we can use the TX/RX. But TX/RX on … [Read more...]

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...]

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...]

These projects are good for the beginners to learn basic things. We are showing a basic light meter, you'll try to add a push button to start and another push button to stop. In previous articles we have shown how to create basic sound meter with microphone and Arduino. That circuit was slightly difficult. LDR aka Photoresistors are more easy electronic component. Indeed, you can directly use a … [Read more...]

LED bar display is actually like multiple LED, it is not like Arduino modules like TM 1637. Here is a guide explaining the basics, circuit diagram, code on Arduino and LED Bar Display. We need no extra library for the LED bar display but we need correct circuit and logically correct code to use this electronic component. Big advantage of LED Bar Display is it is quite cheap, we can use with IC … [Read more...]