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 TRAIC Light Dimmer. Show all posts
Showing posts with label TRAIC Light Dimmer. Show all posts

TRIAC Light Dimmer

 Abhishek Kamdi  No comments

Schematic -

Parts List -
R1 - 1 - 50K Pot
R2 - 1 - 15K 1/2W Resistor
C1, C2 - 2 - 0.068 250V Capacitor
L1 - 1 - Lamp To Be Controlled (up to 350 watts)
L2 - 1 - Neon Lamp
TR1 - 1 - 40502 TRIAC
MISC - 1 - Case, Knob, Heatsink For TR1, Wire, Socket For L1

Notes -
1. This circuit is for 117VAC only. 220 or 240 V will burn up the circuit. L1 can be a maximum of 350 watts.

2. The circuit must be installed and used in a case.
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