Digital Multimeter/Oscilloscope Free

This Digital Multimeter/Oscilloscope help you to measure: 1 - Volts 2 - Ohms 3 - Temperature 4 - The light (lx) 5 - Frequency 6 - Amplitude 7 - Oscilloscope included 8 - Sound Generator sine/square wave 0Hz - 20000Hz included(in version pro) 9 - Color code resistance calculator 10 - Save measuring data!! 11 - Added capacitance meter from 1nF to 10000 mF 12 - Inductance meter! It's easy to build, you just need: 1 -A arduino uno or nano 2 - Bluetooth module(HC-05 or HC-06) 3 - Temperature sensor(TMP36) 4 - Some resistances. And for Oscilloscope: 1 - A old headphones with 4 pins 2 - Capacitor from 0.1mF to 1mF. MY WEB PAGE : https://www.neco-desarrollo.es Please watch video tutorial How to use oscilloscope: https://youtu.be/ZwNe8yEjjxo **For build the circuit follow this** LINK FOR DOWNLOAD SCHEMATIC: http://neco-desarrollo.es/arduino-multimetro LINK FOR DOWNLOAD ARDUINO SKETCH HERE: http://neco-desarrollo.es/arduino-multimetro MY WEB PAGE: www.neco-desarrollo.es Councils to improve the precision: 1 - Check the voltage of 5v pin of arduino after connecting everything, it is the reference voltage to measure ohms when connecting the bluetooth module the voltage drops a bit, it can be in 4.8v, put exact value in the arduino code 2 - The values ​​of the resistances must be precise 2 - You must weld all the connections to avoid parasitic resistances Multimeter/Oscilloscope try it now!