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led ckt with photodiode
i think your IR detector(modulaor) is not working properly. As i have used an ordanry IR detector module, there is no any problem.
tell me how much % rang is reduced when tube light is placed on that?
if it is about 10% or less. that is no problem if it is more, then...
i want to know about some questions about NiCAD batteries
1: how can we know that battery cell of 1.2v is charged fully. how much voltage
will be when it is charged fully.
2: how can we calculate the value of resistor in series of cell to charge it completly
3: does rapid charge, reduce...
this is very easy to build, just use a spring, has the tension according to the weight of drip, then use a micro switch. it will be connected on the top of spring fitting. when drip will loose the weight bottom of spring will go up and at last it will press the switch...
lm317t 3.3 v
Ithink the fixed value resistors r not suitable here because they can vary little bit.
but here you can use variable resistors to set your required voltage value that is the best way
i also faced this problem some time before.
I noted that pin 2 shloud not be opened(float).
you must pull it up by connecting a resistor of 10k between pin 2 and +v.
if the distance is longer then 1 foot. then you have to use a relay . connect com. terminal of relay to pin 2 and N.O terminal to...
LM317 is the best solution but you can use 2 NPN transistors as darlington pair.
and use one 4.2Volt zener diode.to ragulate the out put.
If you do'nt understand, mail me i will send you the circuit diagram
if u need sq. vawe funnction gen.
the use CD4046
that has tone decoding too.
its one output activates when osc frq is equal to set frq.
see more in CMOS data sheet
if u need saw tooth or sine vawe then XR2206 is best