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Thank you Art
I will try it

Hello Norm,
I tried your example code, but maybe i did something wrong because it did not work
First i understood that you use an array , size 100 to store the readings. Is this array of words or...

I try to use the CVD method on a pic18f but i did not have any luck
The 18f does not have CSM , they have only mtouch
The issue with mtouch is that you must touch the sensor to get a response, and...

This is an other issue of my current transformer Adam. The CT i use, is a PCB type and gives 10 mv for an amp up to 50 mv for 5 amps.

Thank you Nick
I will look on this too. It might be a good solution to get rid of the power components problem
Regards
Ion

Thank you very much.
I am going now to set up a bread board and try it
Regards
Ion

1-2 seconds will be fine

Some how i have to bring to pic a level 1 for each good heater and zero for a burned one. They are not enough A/D on the pic to handle 16 channels.
So, what i need is to convert before pic the...

The pic is supposed to monitor 16 heaters. Can be done with a multiplexer, but my boss wants a visual LED for each burned heater, so in this case i decided to have 16 separated inputs. He wants the...

Thank you Demon,
I am testing now a ACS712 and in the scope it looks like a sine wave - 60 HZ, swinging between +1 volts to + 3.5 volts
I will get tomorrow an LTC1966 from Linear Technology , which...

I believe that the relay first will not withstand the 5 amps on the coil.
The second issue is that voltage is chopped by the SSR and heat controller, and the relay will come to a point when it will...

Adam and Ioanis, both of the solutions will works if i combine them. Optocoupler in series with heater is not feasible due to the amount of heat dissipation on the limiting resistor for the diode on...

I think Mister_e solution it is something which i will consider, but i have to solve the conversion of 10 mv ac/60 hz to a decent DC voltage so i can use it with a comparator.
As i said, analog it...

Thanks to every one for suggestions.
My problem here is that the current transformer give me 10 mv AC, which will be 5 mv ac if i take only the positive side of it.
The output also it is a sine...

Hello Adam,
Thanks for reply but i am afraid, like i mentioned before about the power dissipation on the diodes.
I have to do some tests to see if it will work.
Thanks
Ion

Thanks Archangel,
I do not know if it will works, but i will try it. I am some how concerned about the power dissipation as they are 5 amps going through the diodes, and they will be 32 on one PCB...

r2 is to turn on the opto.
all i need is to sense if the heater is burned out when the switch is closed.
I do nt measure current
thanks

Hello,
I have a Coilcraft current transformer which give me 10 to 50 mv AC for 1 to 5 Amps .
I need to convert the output to a digital 1 or 0, current through, no current
0 = no current
1 =...

Hello,
I do not have any opto in mid yet, but i am flexible on what ever i can use.
Here is a concept of what i need
regards
Ion

Thanks Robert, but you missed the whole point of the question. For constant current ti is not an issue as we use Ohm's law to calculate.
The point is in this particular case that current change from...

Hello,
I have a line where the current varies from 1 to 5 amps.
I would like to insert a resistor which will turn on an optocoupler rated at 1.5 volts , 10 mA
The issue here is that at 5 amps i...

Thanks Archangel for reading my post and offer to help.
Here are the conditions:
I must check during the weld process, and i have to make sure that the current going through the wire is over 1 amp....

Thank you Gevo for suggestion. I have to test it first because i do not know the value of magnetic field at 10 amps.
I will update you when i get it

Hello,
I need help to achieve a very difficult task for me.
We have in the plant few machines for welding plastic, based in heating plastic and pressing the parts together.
The company which made...

Hello Darrel,
I know the topic is old , but i need help as i am new to analog. Will you be so kind to post the schematic, mostly i am looking at the use of the TLV324. I do not have a clue about op...