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If you are in a plan to build your own speedometer for your next robotic vehicle, ofcourse you need an RPM sensor to complete the task.

Moisture Monitor for Plants

The core of this moisture monitor circuit is built around a ripple-carry binary counter and a few commonly available components.

Electronics Projects, Motors, Belt, Plant, Hardware, Industrial

This digital thermometer can measure temperatures up to 150C with an accuracy of +_1C. The temperature is read on a 1V full scale-deflection (FSD) moving-coil voltmeter or digital voltmeter. Operational amplifier IC 741 (IC3) provides a constant flow of current through the base-emitter junction of npn transistor BC108 (T1). The voltage across the base-emitter junction …

This digital thermometer can measure temperatures up to 150C with an accuracy of +_1C. The temperature is read on a 1V full scale-deflection (FSD) moving-coil voltmeter or digital voltmeter. Operational amplifier IC 741 (IC3) provides a constant flow of current through the base-emitter junction of npn transistor BC108 (T1). The voltage across the base-emitter junction …

Circuit Diagram of Transistor Intercom System

11 Best Arduino Starter Kits For Beginners

Electronics Hub - Latest Free Electronics Projects and Circuits

Co2 in fire extinguishers or even Carbon dioxide is actually a naturally occurring gas contained in the atmosphere which is required for existence on the planet whether it is relating to photosynthesis or even for cellular respiration. Carbon dioxide also offers the capability to extinguish fire and also used as a powerful extinguishing agent both in mobile and stationary installed fire... FULL ARTICLE @ http://www.discountfireextinguishers.co.uk/news/22/Co2-Fire-Extinguishers.html

Co2 in fire extinguishers or even Carbon dioxide is actually a naturally occurring gas contained in the atmosphere which is required for existence on the planet whether it is relating to photosynthesis or even for cellular respiration. Carbon dioxide also offers the capability to extinguish fire and also used as a powerful extinguishing agent both in mobile and stationary installed fire... FULL ARTICLE @ http://www.discountfireextinguishers.co.uk/news/22/Co2-Fire-Extinguishers.html

Auto Turnoff Soldering Iron Circuit: This is a circuit which helps the soldering iron to turn off automatically when it detects overheating and thereby avoids it from getting damaged. For complete information about this circuit, visit http://www.electronicshub.org/auto-turnoff-soldering-iron-circuit/

11 Best Arduino Starter Kits For Beginners

Auto Turnoff Overheated Soldering Iron Circuit Diagram and Its Working

Human Detection Robot Circuit Diagram - Transmitter Section

Human Detection Robot Circuit using 8051 Microcontroller

Here is an IR Sensor based human detection robot designed using 8051 microcontroller.

microcontroller  power supply circuit

Lots of projects use the microcontroller (uC) as the ‘brain’ - for example as an intelligent controller in the prototype of a flying machine.

A counter whose logical output increments in steps on receiving clock pulses is used for a variety of counting and timing applications. It is at the heart of digital clock circuitry and other similar timing devices. The counter comprises two NAND gates of CD4011, up/down counter CD4510, 7-segment decoder CD4511 and some discrete components. NAND …

A counter whose logical output increments in steps on receiving clock pulses is used for a variety of counting and timing applications. It is at the heart of digital clock circuitry and other similar timing devices. The counter comprises two NAND gates of CD4011, up/down counter CD4510, 7-segment decoder CD4511 and some discrete components. NAND …

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