DIY KIT 61- Digital clock DIY kit with thermistor and photoresistor

This is yet another digital clock DIY kit for electronics beginners. I have previously published several posts related to the digital clock. This kit is no different from those kits, it also displays time and the additional functions and temperature display and alarm. It also has a photoresistor which makes it sensitive to ambient light, the clock will automatically be brighter during the day than at night. The display is 0.8 inches big. With a transparent case, components can be well protected and the clock looks stylish. It is a perfect kit for electronic DIY enthusiasts, school training lessons, etc. (more…)

DIY KIT 51- LM358 based heat and light sensor

This is yet another project based on LM358.  The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. (more…)

Arduino Project 4- LDR and Buzzer Experiment

In this project, we will learn to experiment with LDR and a buzzer. The output of this experiment is sound with different frequencies that are produced depending upon the light falling on the LDR/photoresistor.

STEPS
– Connect the negative black wire of the buzzer to pin GROUND and the black positive to the digital pin 9.
– Connect to pin 5V a resistor of 1 kΩ and the other end of it a photoresistor and pin A0.
– Connect the other lead of the resistor pin GROUND.

List of components:

Name Quantity Component
R1 1 1 kΩ Resistor
PIEZO1 1 Buzzer [Piezo small]
R2 1 Photoresistor
U1 1 Arduino Uno R3

 


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