Gsm Based Controlled Switching Circuit Between Supply Mains. Gsm Based Controlled Switching Circuit. The owner of the place will send a particular SMS to switch on or off the particular device in an. SMS Based, GPRS, SMS, Mobile Controlled.
GSM Based Cell Phone Remote Control Switch Circuit. Now you can control any electrical gadget from any part of the world through your cell phone, that too without spending a penny for the individual commands. Whether it’s you vehicle, your basement door, your mansion gate or simply the air conditioner of your house, everything can now be switched by just a flick of your cell phone button. And mind you, it’s completely fool proof, meaning no false triggering is possible through any other cell phone signals, it works only through the owners cell phone commands. The modem cell phone is initially made ready by putting a SIM card inside it and by configuring the essential assigned numbers into its phone directory. Therefore you would want to assign only those numbers through which you may like to make a call to the “system”.
A simple yet effective cell phone remote control switch details has been discussed here with complete schematics and step by step tutorial. If you have sufficient prior knowledge of electronics, you should be making this complete unit within a days time.
Let's begin the discussion. Basic Concept The idea here is to use an ordinary NOKIA 1. This entire unit now becomes the receiver unit.
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- The idea here is to use an ordinary NOKIA 1280 cell phone as the modem attached permanently with a switching.
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The modem cell phone NOKIA1. When the modem cell phone is called through these assigned numbers, the modem ring tone becomes active and this ring tone is applied to the control circuit and is processed for operating a relay and the connected load. Since the modem cell phone needs to be attached permanently inside the switching unit, it needs to be charged at regular intervals so that it remains functional all the time. For this, a separate cell phone charger module has also been incorporated along with the main circuit which keeps the modem cell phone battery always up to date and fully charged. It is quite obvious that the attached cell phone modem will need a SIM card, which will need to be maintained as we do for normals cell phone operations. Let's learn the building process.
You will have first get or procure the following materials or parts for making this unit. I would suggest not to make the Printed board initially, it would better to first test the working over a general board and if thing goes then you would want to transfer it over a well designed P- C- B. R1 = 2. 2k. R2 = 2. OHMSR3,R1. 1,R1. 2 = 1. KR1. 3 = 1. 00 Ohms. R4,R6,R7,R9 = 4. 7.
KR5 = 1. K,R8, R1. MC1,C4,C5 = 0. 2. F DISC TYPEC2,C3 = 1. F/2. 5VT1,T2,T4,T5 = BC 5. BT3 = BC5. 57 BALL DIODES = 1. N4. 14. 8IC1 = 4.
RL1, RL2 = RELAY 1. V/3. 00 OHMS SPDTJACK = 3. AUDIO JACKCELL PHONE MODEM = NOKIA 1.
Understanding the Schematic Diagram The above diagram is rather very easy to understand. It may be divided into two main stages, the lower stage consisting of the transistors is a simple audio amplifier, the upper stage consisting of IC is the flip flop triggering stage. When a signal is present at the 3.
T1, T2 amplifier to some greater level, which is further amplifier by T3, T4 to a level is becomes sufficient for triggering the relay RL1. RL1 instantly connects the supply to the input of the flip flop at C5, via its N/O contacts. Note that RL1 will remain switched ON as long as the ring tone is present and will switch OFF the moment the ring tone or the signal over the 3. C3 makes sure that the relay does not get rattled by any insignificant signals or RFs.
L1 has been installed also for the same reason, that is for eliminating unwanted signals and making sure that T3, T4responds only to valid ring- tones. L1 is a buzzer coil, as used in piezo electric buzzers, or may be hand made by winding 1. SWG super enameled wire over a small ferrite core, size and shape does not matter. Image of L1, inside a buzzer The period for which RL1 remains switched ON will have no consequence on the flip flop operation, the flip flop will switch ON and OFF in response to every subsequent missed call made from the owners cell phone.
The section comprising the IC 7. The charger will keep the cell phone battery always charged so that it remains functional all the time. The above circuit has been thoroughly tested and confirmed by me, so if you make everything as shown in the above diagram, it should start working immediately. How to Assign Numbers Inside the MODEM CELL PHONE It's very easy. Just follow the following steps. Save the names and the numbers which are important and through which you want the above unit to be operated. Next select a particular name- -> -- press scroll right- -> -- .
Repeat this for all the desired numbers. Now go to settings, go to tone settings and select . It will respond to only the calls made from the assigned numbers.
How to Power the Unit The circuit needs to be powered through a DC1. V/5. 00m. A or 1 Amp SMPS adapter. The load may be any electrical appliance like lights, fans, AC, fridge or anything that you may like to switch using this system. WARNING AND DISCLAIMER – THE PROPOSED DEVICE MUST BE USED FOR OPERATING ONLY THE COMMON HOUSEHOLD ELECTRICAL SYSTEMS AND PARAMETERS. THE PROPOSED CELL PHONE OPERATED SWITCH MUST NEVER BE USED FOR ANY OTHER INTENTIONS OR PURPOSE WHATSOEVER, AND THE AUTHOR TAKES NO RESPONSIBILITY FOR ANY LOSSES THAT MIGHT OCCUR IN CASE THE UNIT IS USED FOR OPERATING ANYTHING ELSE OTHER THAN WHAT'S BEEN SPECIFIED IN THE ABOVE ARTICLE.