You want to send data to a serial device such as a serial LCD, but you are already using the built-in serial port to communicate with your...

You want to receive data on Arduino from a computer or another serial device; for example, to have Arduino react to commands or data sent ...

The circuit below is darkness detector that is it automatically turns on the LED when LDR senses no light. LDR is the light dependent resi...

Infrared LEDs are just like ordinary LEDs but the light output cannot be seen. To view an infrared LEDs, turn it on with the appropriate ba...

This circuit produces a weird "Laser Ray" sound and flashes a  LED at approx 5Hz.  COMPONENTS USED: 1.one 555 IC 2.one 1...

This circuit does not turn on for XX seconds after power is applied. Adjustable from 1 second to 2 minutes.The delay can be adjusted by cha...

This circuit will toggle the output each time the switch is pressed. The action cannot be repeated until the 10u charges or discharges via ...

This circuit makes a LED fade on and off.  first charges a 100u and the transistor amplifies the current entering the 100u and delivers 10...

This led matrix can be programmed using arduino, various patterns can be made using functions and by specifying the LED's on the array...

DC motors, which you can find in numerous devices around your home, rotate continuously when a DC voltage is applied across them. Such mot...

The 555 operates at 2Hz. Output pin 3 drives the circuit with a positive then zero voltage. The other end of the circuit is connected to a ...

Figure below shows what is often referred to as an integrated circuit (IC). The circuit is actually etched onto a tiny wafer or “chip” of ...

Time to establish a clear idea of how sound is transformed into electricity and back into sound again. Suppose someone bangs a gong with ...

Loudspeakers utilize the fact that if you run a varying electrical current through a coil situated in a magnetic field, the coil will move ...

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All digital inputs use a pullup or pulldown resistor to set the “default state” of the input pin. Imagine the circuit in Figure below witho...

we can generate analog output values by using a trick called pulse-width modulation(PWM). Select pins on each Arduino can use the analogWri...