DolphinLabs
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An AC Current Detector is a device or circuit that senses the flow of alternating current (AC) through a wire or appliance. It typically uses components like a current transformer (CT) or hall effect sensor to detect AC current and activate an indicator such as an LED or buzzer.
₹180.00 -
An AND gate can be built using BC547 NPN transistors, a common general-purpose transistor used in digital circuits.
The circuit represents both the inputs A & B for the AND gate and Output, Q, which also has a +5V supply to the collector of the first transistor, which is connected in series to the second transistor, and an LED is connected to the emitter terminal of the second transistor. The inputs A & B are connected to the base terminal of Transistor 1 and Transistor 2, respectively, and the output Q goes to the positive terminal LED.
₹190.00 -
An Arduino Theremin using Arduino, an ultrasonic sensor, and a speaker that produces varying sound pitches based on the distance of an object from the sensor.
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An Astable Multivibrator is an electronic oscillator circuit that continuously switches between two states without any external triggering. It produces a continuous square wave, making it ideal for generating clock pulses, timing signals, and blinking LEDs.
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An Automatic Door System using Arduino, an ultrasonic sensor, and a servo motor that detects an approaching object and opens the door automatically.
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An Automatic Room Cooling is an electronic system designed to maintain a comfortable room temperature automatically. It uses a DHT11 temperature sensor to monitor the room, a DC fan for cooling, an LCD to display real-time data, and a buzzer to provide alerts. The system activates the fan automatically when the room temperature exceeds a set threshold, making it an efficient solution for homes, laboratories, and small offices.
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An Automatic Street Light using the IC 555 is a simple circuit that turns street lights ON at night and OFF during the day automatically. It uses a Light Dependent Resistor (LDR) to detect ambient light and a 555 Timer IC configured in comparator mode to control the switching.
₹175.00 -
The Automatic Watering System provides an efficient, reliable, and convenient way to maintain soil moisture levels without human intervention. By using sensors and a microcontroller, the system ensures that plants receive the right amount of water at the right time, reducing water wastage and promoting healthy plant growth. It is an eco-friendly solution that saves time, energy, and resources, making it ideal for both domestic and agricultural use.
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A Battery High-Low Monitor is an electronic circuit or device that detects and indicates the voltage level of a battery — whether it’s too high (overcharged), normal, or too low (discharged). It helps protect batteries from overcharging or deep discharge, which can damage the battery or reduce its lifespan.
These monitors often use comparators, voltage dividers, LED indicators, or microcontrollers to track and display battery status in real time.
₹225.00 -
A Bicycle Direction Indicator is a safety system that uses LEDs or blinkers to signal the rider’s left or right turn intentions, just like car indicators. It’s often controlled by push buttons, switches, or microcontrollers.
₹180.00 -
A Bird Bell is a device designed to either attract, entertain, or repel birds, depending on its purpose and context. Traditionally, it is a small bell-shaped object made of metal, ceramic, or wood, and is usually hung in gardens, balconies, farms, or near bird feeders. Its name comes from its interaction with birds — it may ring when birds land on it, brush past it, or when the wind causes it to move.
₹190.00 -
The Conveyor Belt Object Counter using LDR and 7-Segment Display with the 8051 microcontroller is designed to count objects passing in front of an LDR (Light Dependent Resistor) sensor. The system works by detecting light interruptions when an object crosses the sensor, causing a change in the LDR’s resistance. The microcontroller processes this change and increments an object count. The count is then displayed on a 7-segment display.
