My Light Diagram

This is a simple cell phone detector circuit diagram , this is a pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cellphone from a distance of one and-a-half meters. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also useful for detecting the use of mobile phone for spying and unauthorized video transmission.   Simple Cell Phone Detector Circuit Diagram  

4.2 Primary Cell It is not rechargeable.  After it is exhausted or depleted, it is discarded. The reason is that the chemical action that takes place in it is not reversible. The most common primary cell types are the zinc acid cell, Leclanché cell, Manganese-alkaline cell, mercury cell, silver oxide and lithium-air cell. 4.2.1 The Zinc-acid Cell The diagram below illustrates a zinc-acid cell also referred to as the simple cell. It consists of: (a)        zinc as the negative electrode, (b)        copper as the positive electrode, and (c)        dilute sulphuric acid as the electrolyte. Simple cell The chemical reaction that takes place between zinc and sulphuric acid is: Zinc + Sulphuric acid  à Zinc sulphate + Hydrogen + Electric energy. The hydrogen gas collects in bubbles around the copper elec­trode. The e.m.f. of this cell is 1.5V. This cell has many defects and for ...

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This is a simple PIC Security System Dials Your Cell Phone Circuit Diagram . Do-it-yourself phone dialer security system calls your cell phone, office etc. whenever a door or window is opened, or panic button is pressed. Great Home Alarm. PIC Security System Dials Your Cell Phone Circuit Diagram The circuit consists of a small PIC microcontroller, assembly program, and a few other parts to detect a switch closure from an open door, window, or manual push button and then dial the cell phone number, and transmit a steady tone to indicate the source of the call. The circuit uses the pulse dialing system to interrupt the line connection a number of times to indicate each digit. Pulse dialing (the oldest form of dialing) works by actually disconnecting or "hanging up" the phone line a number of times to indicate each digit. For example, the digit "5" would be dialed by disconnecting and reconnecting the line 5 times in short intervals of about 100mS. There is about a 1 s...