Making a motion-controlled lamp using ultrasonic sensors

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HC-SR04 is an inexpensive ultrasonic sensor module readily available in market these days and is extensively used in robotic applications for sensing and ranging the obstacles. With a proper arrangement of multiple ultrasonic sensors, it is possible to detect motion and its direction too. This motion-controlled ultrasonic lamp project uses three HC-SR04 sensor modules in an array to detect a waving hand in front of them and rotates the lamp to adjust its position according to the direction of motion of the hand.

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Real-time GPS tracking device for vehicles

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Check out Cooking Hacks Arduino-based GPS tracker project for vehicles that could be extremely helpful to pinpoint the exact location of the vehicle in case it is stolen. The project uses a GPS+GPRS shield with an antenna to locate the coordinates of the vehicle. You need to call the device from your preset phone number, which will be verified by the SIM908 module on the tracker, and it will then send you an SMS with the GPS coordinates of its location.

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Another IR controlled light switch

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Vadim Panov’s new project is about an IR controlled light switch that operates with any RC-5 compatible TV remote. His switch is built around the ATTiny2313 MCU clocked at 8MHz. The IR receiving part is designed for decoding the 36KHz modulated IR signal using the TSOP1736 device. The thing I came up with at the time was a light swich for my room controlled over an IR remote from TV. Remote that I had used RC-5 protocol, hence the firmware is suited for any RC-5 compatible remote. Everyone is familiar to the everliving problem with switching the lights off in your room

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Solar battery charge controller

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This Arduino Nano controlled solar battery charger can charge a standard lead acid 12V battery and runs with 90% efficiency under 70ᵒC (158ᵒF). The circuit can take up to 24V input from the solar panels. The maximum power point tracking is implemented in the circuit by measuring the output voltage and current from the solar panel to get the maximum possible power from it.

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PIC based count down timer

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Here is another countdown timer based on the PIC16F886 microcontroller. The timer displays the time on four bright 7-segment LEDs, which are driven by a TLC5916 LED driver chip. The timer flashes the seven segment LEDs when the time is up. The timer settings are done with a rotary encoder with a push button, and gets powered from two AAA batteries.

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