Neophysics
New Member
I am trying to measure the current flow in a mains wire and interfacing it with a ADC, i have a 50:5 current transformer, and have been looking at a simple ADC0804 anologue to digital converter, the problem is i dont know of a circuit that can get accurate dc input (for the ADC) from a AC 50hz current transformer, i have looked at a differential amplifier but its it fairly confusing...
Also i have to link 8 relays to the output of the ADC (8bit) ???, which cannot have a change rate of more than 2hz, and the adc sinks on the output so could you help me with a pnp/npn relay driving setup
my current solution is CT > AD637 (rms to dc converter) > LF398 (sample and hold) this apparently can get me a 2hz data output on the adc > ADC0804 8bit anologue to digital coverter, i have put lots of time into this to get this far but my limited experience cannot take me any further...
i would be very grateful for your help, i am new to this forum as i spend alot of time on the internet just trawling and gathering information, but this time i need a bit of help
many thanks
Also i have to link 8 relays to the output of the ADC (8bit) ???, which cannot have a change rate of more than 2hz, and the adc sinks on the output so could you help me with a pnp/npn relay driving setup
my current solution is CT > AD637 (rms to dc converter) > LF398 (sample and hold) this apparently can get me a 2hz data output on the adc > ADC0804 8bit anologue to digital coverter, i have put lots of time into this to get this far but my limited experience cannot take me any further...
i would be very grateful for your help, i am new to this forum as i spend alot of time on the internet just trawling and gathering information, but this time i need a bit of help
many thanks