Cell Phone Jammer Using IC555

A Simple Cell phone jammer using IC555.

GSM Controlled Robot

In the project the robot is controlled by a mobile phone that makes a call to the mobile phone attached to the robot. In the course of a call, if any button is pressed a tone corresponding to the button pressed is heard at the other end called ‘Dual Tone Multiple frequency’ (DTMF) tone.

8x8 Dotmatrix Scrolling LED Display

Here 64 leds which are connected to an Matrix display. The Anodes are drived through an Driver IC UDN2981 and the cathodes are drived through ULN2803. The Atmega8515 is used in this project to control the display. The microcontroller is programmed with Bascom AVR.

Infrared Remote Switch

A Simple Infrared remote control circuit.

Showing posts with label Rain Detector Circuit. Show all posts
Showing posts with label Rain Detector Circuit. Show all posts

Rain Detector Circuit

 Abhishek Kamdi  No comments


Parts List -
R1 - 1 - 1K 1/4 W Resistor
R2 - 1 - 680 Ohm 1/4 W Resistor
D1 - 1 - 1N4001 Silicon Diode
BZ1 - 1 - 12V Buzzer
S1 - 1 - SPST Switch
SCR1 - 1 - C106B1 SCR 106CY
SENSOR - 1 - See Notes
MISC - 1 - Board, Wire, Case, PC Board (For Sensor)

Notes
1. The sensor is a small piece of PC board etched to the pattern showen in the schematic. The traces should be very close to each other, but never touching. A large spiral pattern would also work.

2. Make sure to use a loud buzzer.
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Courtsy-simple-electronics.com

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