Post by thread:AC current reading.

As Tom said last week this is not a PIC question but it is part of a PIC project. Is there a cheap easy way to read AC current from a 120V. line with a PIC? Thank-you all... Rogerio

You can interface a Pic directly to a 110 VAC line using a 5 ohms resistor in series with the pic. If you connect to the RTCC input you should put also a clamping diode between the pin and VCC. For more details look at the application note AN521. Ricardo On Tue, 9 Apr 1996, Rogerio Odriozola Belden wrote: > As Tom said last week this is not a PIC question but it is part of a PIC > project. Is there a cheap easy way to read AC current from a 120V. line with > a PIC? > Thank-you all... > > Rogerio >

> > You can interface a Pic directly to a 110 VAC line using a 5 ohms resistor ^^^^^ !!!!!!!!! With a 5 ohm resistor the PIC will pop like a firecracker! I'm pretty sure you meant 5 megaohms. BAJ

At 23:18 9/04/96 -0400, you wrote: >> >> You can interface a Pic directly to a 110 VAC line using a 5 ohms resistor > ^^^^^ !!!!!!!!! > >With a 5 ohm resistor the PIC will pop like a firecracker! > >I'm pretty sure you meant 5 megaohms. > >BAJ > > UOPS. I'm sorry you're rigth it'is 5 megaohms resistor. Ricardo