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prateeksikka
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Posts posted by prateeksikka
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simple!
you can use the principle that water with some impurities is a good conductor of electricity(assuming ur water is not 100% pure) the circuit would be complete,
use this current to cause a voltage drop across a resistor,feed this voltage to the base of a transistor,it will turn on causing collector current to flow.this will switch on a relay in collector circuit to complete /break the circuit for your motor(preferably,armature winding)
;D ;D -
from where can i know the forum policies?
what was the one about which moutoulos was talking? -
hi audioguru!
so in that sense anything
less than 40 ohms is continuity !
mine is same too!it gives a beep even b/w supply and ground in my circuit.
;D -
hi audioguru!
sorry for the post at the wrong place.could u please have a look at the topic of MULTIMETER in chit chat section and help me out!i am in deep trouble ??? -
hi audioguru!
any comment from you on the topic.when does a multimeter give a beep?
[move]help![/move]
::) -
hi alun!
even a pentium processor would do the job for him.ultimately that is also a controller! he may write a program to send a data to a parallel port and send back some data from the card to PC. some programming in C would be a required.somewhat similar to a hardware lock.anyhow alun,do u have any idea for sending data from a card to a PC port so that i can use inport command to read that data?
do we need a controller in that too.
::) -
hi steven!
earlier i had the misconception that beep comes when the points are short circuited.
but i was surprised when i connected the meter b/w supply and ground and gave the beep!!!!!!!!!!
by the way the continuity which u are talking about,what is that i mean to what resistance level we consider continuity(certainly not short ckt) otherwise it would not have given the beep b/w supply and gnd. ;D -
i dont much about bar code and magnetic strip detectors but atleast i know it is 99% similar to your cassette player principle.
u have to have a magnetic pattern on a card like the ATM CARD. -
BETTER FOR YOU TO FIRST GO THROUGH
THE ELECTRONIC TUTORIALS AVAILABLE ON THE NET.
TRY OUT www.howstuffworks.com also ;D ;D -
hi steven!
i think it should also give a beep with high resistance in continuity. but it gives no beep across a say 10k resistor connected on my PCB. EVEN IF I TEST IT OPEN CKTED,
SIMILAR BEHAVIOUR IS NOTICED,BUT I HAVE NOTICED THAT IT CONSIDERS AROUND 50 OHMS FOR GIVING A BEEP. NO BEEP FOR MORE RESISTANCE ;D! ;D -
yeah!
quite good during the testing phase.otherwise waste a long time and PCB money for testing a ckt which u have just designed ;D -
i have no manual with it.but one thing is certain,it gives a beep when a certain maximum resistance is in the path and i am going to find it soon.plz help!
if anyone has already done it.in other words what is continuity?
;D -
hi MP!
WE assume -ve charge on cloud bottom and +ve on the earth.is it merely an assumption i.e can we assume the reverse?or there is a logic behind it?
:o -
HI ALL!
TILL NOW I HAD THE PERCEPTION THAT A MULTIMETER GIVES A BEEP WHEN ITS 2
TERMINALS ARE SHORTED.BUT TODAY ONLY I CONNECTED A 4.7k RESISTOR TO MY SUPPLY AND CONNECTED THE MULTIMETER ACROSS THE RESISTOR AND IT GAVE THE BEEP.WHAT IS THE CONDITION FOR THIS BEEP?
WHAT IS ITS SIGNIFICANCE?
PLZ REPLY SOON ??? -
no ante!
i dont mean that it is AC.
I mean to say that u may consider any one of them (the cloud or the ground)
as +ve or -ve ultimately it is the flow of charge which neutralizes the 2.
if we assume opposite, the direction of current is reversed.Now whether +ve neutralizes the -ve or the -ve neutralizes +ve what difference does it make?
nothing. ;D -
U ARE A BETTER MATHEMATICIAN TO CONVERT THE CURRENCY!.BUT IT WOULD BE EASILY AVAILABLE IN BIG CITIES OF CANADA TOO.
;D -
anyway dazza!
u can assume anything whether it flows from clouds to ground or ground to clouds,
+ve in one case -ve in other.
So fast moving air separates the vapours in the clouds and makes them oppositely charged this induces opposide charge on earth(i mean opposite to charge on lower cloud) so charge moves to have neutralization.OK EVERYBODY? ;D ;D -
yeah!
this is what i mean the link given by you says the torque is proportional to V*I.
but actually it is proportional to the product of 2 currents in coils I1*I2. but since potential coil has high resistance,the voltage drop is what we consider(simple ohms law) so it becomes I1*V2.i.e power in the load ;D ;D -
mechanism similar to a photocopying machine!
interesting only diff water in place of ink.
fair enough any comments?
or polar nature of water?
what are clouds made up of? -
hi steven!
it is generally not recommended to use breadboards for large ckts.PCBs do have some function.i hope u agree ;D -
these are books which cover A-Z of microprocessors,both hardware and software(programming with a few good examples).u might be having a kit at your workplace.try them out ;D
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any big dealer of electronics goods has it.
it costs about 150 indian rupees .easily available
;D -
u can study any book on introduction to microprocessors
for 8085 u can refer R.S Gaonkar,B.Ram(indian)
for 8086 u need douglas V.hall
thats it and dont think that u cant do without it.
gone are the days of these processors.
;D -
yeah that is the case.
it is clear that it is due to separation of charges.but how does water causes these separation.is it possible to generate artificial lightening?
;D ;D ;D
LED display board
in Electronic Projects Design/Ideas
Posted
are u proficient enough in C or C++?