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hi
i transmit and recieve alarm signals with encoder and decoder ics(and transmitter , reciever modules) as pt2262 and pt2272,i recently wrote a code for microcontroller to use it as a encoder ic such pt2262 but i dont know how to write code for micro to use it as decoder ic such pt2272...
hi
i want to know what the range of camera output signal frequency is?
can i take samples of the output analog signals and digitalize them
with a microcontroller ?
dear bunalmis yau have talked the math meaning of what we want to do
separating dc and ac then full wave rectifing ac and adding them
dear kral you have exactly analysed what i want
lets talk about extra lowpass filter ,its so easy with a serie capacitor
then please guid me for a high pass for...
hi
just i want to change first signal to second
a point is that the circuit that analyse the second wave shape has a
very high input resistance for both dc and ac (about 4.7M ohms)
X can be about 125 but i dont believe that to be important
thanks for suggesions and expriences
Re: automatic switch betwen two power supplies for one circu
hi friends
nearly i have solved my probem with two transistors
although in the circuit i have 0.5 volt drop but
i myself need this drop because of four series batteries
that output voltage when full charged may reach 5.7 or 5.8
what...
Re: automatic switch betwen two power supplies for one circu
dear yazou
although your suggestion is very good but i wouldnot get that part
during next few days in my country
dear jorgito thanks for your suggestions too
i have to work on jfets and mosfets more
to have a solution
Re: automatic switch betwen two power supplies for one circu
thanks
the main part of the circuit is a microcontroller and i dont want it to
face sudden voltage changes during relay switching
but if you have a successful expriences in such a case and during
a lot of time your uc worked well...
Re: automatic switch betwen two power supplies for one circu
hi jorgito
thanks for your suggestion
i want to explain more about the circuit
one of my power sources is a 7805 regulator and other one
is four ni-ca 1.2 volts batteries in series
i never want these sources to supply the circuit at...
hello
soppuse we have two different electrical power supply sources for one circuit
i want the first source to supply the circuit and at the same time
prevent(disconnect) the second source(battery) of the mentioned circuit
but if the first source failed or disconnected form the circuit
the...
dear ianp
thanks
another question does fully charged NIMH loses its any qulity or life
but the my main question whwre can i find an exact curve
representing the output voltage of the battery according to its life or its left mah
of energy
thenks again
hi
i want to have dc 4.8 volts by connecting 4 batteries(1200mah 1.2 volt)
which batteries are better, i also want to have schematics of circuits
to be able to charge that batteries(not to be complicated chargers)
can anyone help me on this?
thanks
PIR sensor
hi
why dont you use pir detector that you can find very easy
mose pir detectors have two nc and no contacts
that you can easily use them no need to have very
complicated programs
it need a gnd and a power supply(12 volts)
very easy
sonyericsson at command set
hello!
you can fine nearly everything abouyt at commands in the adobfile nemed
t28 at commands
search internet
you'll easilly fine it
good luck
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