
Hyundai Motors in chennai - bangalore national highways near sripermpudur at irungattukottai it located which is 40 kms away from chennai central
A light operated swiitch can be made with the Op-Amp IC 741. LDR is used here as the light sensitive device and Op - Amp is used in its inverting mode. we can add any thpe of load in series with the relay.
Circuit For Light Operated Switch (With LDR) Using OP - Amp (741)
Part List
IC 741
Transistor : SL 100 OR BC 1488
Diode : OA 79, Reply 400 E,9V
Resistance : 1k,10K 2no,VR 470k, 2.2k, 330 Ohm's,
LDR : 1 No
DPDT Switch
Capacitor : 1MF/30V

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Abbreviations are often used in letters. They are short forms of words or phrases. By using abbreviations we can reduce space and save time. Such abbreviations are common in business and official/technical letters.
Some of them are listed Below:
Main Things to be Follow :
1. To Begin Letters:
2. To Begin Business Letters:
3. To Begin Applications:
4. Closing Phrases:
Usually,such letters are written to friends and relatives. they are friendly letters and as such, are written in an informal, conversational and simple in style.
2. Business letters
Business letters include the latters written by persons dealing in business and by few others who order for goods. They are written to manufacturers, banks industries, shopkeepers and companies etc.
3. Official letters
As the title indicates, such letters are written to or by government officials they are not personal letters. These letters include letters writtens to news paper editors, company managers, industries, school head masters, all india ratio, post office etc.