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GSM Remote Control MotherBoard Schematic

The entire remote control is managed by a PIC that oversees the GSM/GPRS module's operations, monitors room temperature via a Dallas DS1820 smart probe, controls the logical state of two opto-isolated inputs, and sends commands to two relays. Additionally, the...

Wireless Auto Tachometer

Anyone performing their own automobile tune-ups knows how important it is to know your engine's speed. With this tachometer, you can measure your engine's speed without any connections or annoying timing lights. The described tachometer is a non-invasive device designed for...

Mobile Cellphone Battery Charger

Stops charging when the battery is fully charged. Portable unit for charging mobile phones. Cellphone battery management is a significant issue while traveling, as power supply can be limited. The described circuit functions as an intelligent battery charger designed to prevent...

A Low Power Wireless Audio Power Amplifier circuit

This low-cost project enables audio reproduction from a television without disturbing others. It eliminates the need for wired connections between the TV and loudspeakers. Instead, it utilizes invisible infrared light to transmit audio signals from the TV to the loudspeakers....

One kind of wireless remote control circuit

The remote control transmitter consists of a DTMF generator and an FM transmitter circuit. A UM91214B phone-specific integrated circuit (IC) is utilized to generate the DTMF signal, with a 3V power supply provided by a 3V zener diode (D1). The...

gsm gps based vehicle theft control

This project focuses on the design and development of a theft control system for automobiles, aimed at preventing and controlling vehicle theft. The system utilizes an embedded design based on GSM and GPS technology. It is installed within the vehicle...

Intelligent home lighting control switch transmitter and receiver circuit

This design aims to create a long-distance wireless remote control switch lighting control system, which consists of a transmission system and a reception system. The system utilizes wireless transceiver modules for RF transmission and reception. The transmitting portion mainly comprises...

Remote Operated Spy Robot Circuit

A remote-operated spy robot circuit can be controlled using a wireless remote controller. It captures audio and video information from the surroundings and transmits this data to a remote station via RF signals, with a maximum range of 125 meters,...

Composed of TDC1808/TDC1809 digital coding control circuit diagram

The TDC1808/TDC1809 is a pair of wireless remote control transmitter and receiver components. They utilize an internal antenna to transmit both digital and analog signals. These components are suitable for various wireless remote control devices. Key features include compact size,...