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Monday, June 18, 2012

DIY voltmeter using ATmega328 and 4 digits 7 segment display

Arduino Code: (Voltmeter Part)

float ATT_Volt=0;
float Voltage=0;
float R1=47000; // measure using a voltmeter to get accurate value
float R2=4660; // measure using a voltmeter to get accurate value
int Value=0;
ATT_Volt=(Value*5.0)/1204;   // 5.0 V of Vcc
Voltage=ATT_Volt/(R2/(R1+R2));  // Display Voltage using 7 segment, LCD or serial terminal

Concept by: Arduinoprojects101

Saturday, June 16, 2012

Function generator based on XR2206 IC

XR2206 is a cheap function generator IC capable of producing sine, square, triangle, 
ramp and pulse waveforms. 

Monday, June 11, 2012

Time, Date, Temperature and Humidity with Arduino mini!

Arduino mini, 74HC595, 16x2 LCD, RTC DS1307, DHT11 Temp/Hum. Sensor and 7805CV voltage regulator. 
Libraries: DHT, Wire, RTClib and ShiftLCD