A simple circuit for measuring electrical current with Arduino.
Project tutorial by Giovanni Carrera
The proposed application uses a temperature sensor, an Arduino and a smart LED strip to create a large thermometer.
A technique for drastically reducing the pins required by a matrix keypad is described.
This interesting project will cover all things required for the ultimate goal of building a mobile remote surveillance camera.
Project tutorial by danionescu
The robot navigates indoor, in a pre-defined path, with high accuracy, and allows its real-time tracking on a phone. No GPS, No WiFi, No Map
Project tutorial by Team oblu
A tiny telegraph that can write any text messages that look like a telegrammes. This project made of oak plywood.
Project showcase by Yegor_A
1) the Arduino AREF pin is an input only in the "EXTERNAL" case, otherwise it is an output of the internal Vref.
2) The voltage follower serves to not alter the value of the R4 resistor as it has an output with negligible resistance.
For several years I measured the waves of the sea and also the motions of the ship using professional buoys to measure the height of the waves and the prevailing direction of the sea. I also know the sensors used on buoys and electronic circuits and radio communication systems and satellite positioning systems.
If you need help I am happy to cooperate.
interesting project, especially with regards to software. As for the hardware part, I suggest you use the internal Vref, which is fairly stable and is about 1.1V with the following instruction in the setup ():
If you want a range of 50 volts, you must use a divider with R1 = 1Mohm and R2 = 22kohm, metal film resistors with a tolerance of +/- 1%. (or 100k and 2.2k)
It would also be advisable to measure the Vref with a good digital voltmeter, after loading the program and configuring the Arduino ADC. Then enter the true value of Vref in the program as it can vary between 1 and 1.2V. Best regards
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