It’s been a while since the last top 10 article so I thought it would be nice to make another one for the last 5 months. What I’ve discovered is the fact that people are really enjoying the Arduino projects, RF & Wireless applications and Solar related circuits, as you can see in the list below. Each link opens in a new tab.
1: Arduino GSM Security Alarm
This project deals with the design & development of a theft control system for home, which is being used to prevent/control any theft attempt. The developed system makes use of an embedded system based on Global System for Mobile communication (GSM) technology.
2: 12V Solar Charge Controller
This Low Dropout Voltage (LDO) solar charge controller uses a simple differential amplifier and series P channel MOSFET linear regulator –their compatibility seems like a marriage made in heaven. Voltage output is adjustable. It is mainly intended for charging 12V lead-acid batteries.
3: RF Based Wireless Remote Control
It is often required to switch electrical appliances from a distance without being a direct line of sight between the transmitter and receiver. As you may well know, an RF based wireless remote control system (RF Transmitter & RF Receiver) can be used to control an output load from a remote place.
4: Arduino Solar Tracker
This solar tracker system uses the Arduino UNO board, a servomotor, 2 LDRs and 2 resistors to rotate the solar panel towards the Sun or a source of light.
5: Arduino Optical Position Rotary Encoder
Front end of an ordinary optical position encoder, used for these tasks, is a slotted Photo Interrupter /Opto-Interrupter module with an IR LED & a Photo Transistor/Diode mounted facing each other enclosed in plastic body.
6: Motion Activated Switch Alarm
The motion sensor switch circuit can automatically turn on a water sprinkler but you can easily use it as a motion sensor light switch or motion activated alarm too. Before beginning the construction contact your nearest electronics component vendor and procure a readymade box-type Passive Infrared (PIR) Motion Sensor unit.
7: Arduino PIR Security Alarm
Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and easily available components. One advantage of using Arduino as a security system is the flexibility! Depending on the external hardware you use, there are various types of security tasks that can be accomplished with the help of this little circuit.
8: Arduino Water Level Indicator
Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when the water has reached the desired level (the highest in our case). You can use only the leds if you want, the lcd is optional.
9: Gas Leak Detector
Here is a gas leak detector circuit that detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit operates off a 9V PP3 battery. Zener diode ZD1 is used to convert 9V into 5V DC to drive the gas sensor module.
10: Arduino Fan Speed Controller
I made this project because I wanted a way to automatically control the speed of a DC fan according to the temperature read by a LM35 sensor. I had a few problems with the PWM part mainly because the fan made a disturbing noise so I had to add a simple RC filter at the output of the PWM pin on the Arduino board.