Nora
Advanced Member level 4
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- Mar 31, 2006
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I built a **broken link removed**that is called an extra sensitive RF detection circuit. I couldn't get it to work although other people say they did.
I also don't fully understand how it works, and therefore can't troubleshoot it. I see 4 op-Amps coupled with capacitors. The author of the circuit says it is 4 (one quad package) high gain inverting op-amps LM324 with a 3-6" wire antenna as input and LED as output.
The configuration of the inverting circuit is also confusing to me, is it correct to put R1 to ground?
And how to analyze when Vout = -Vin(Rf/R1)?
Here's the link to the circuit again. Also- the author of this circuit has written a number of great circuits and electrical articles.
**broken link removed**
Also- I am trying to build a cell phone (900MHz) simple signal detector, please help with theory and circuitry.
Thanks in advance-
Nora
I also don't fully understand how it works, and therefore can't troubleshoot it. I see 4 op-Amps coupled with capacitors. The author of the circuit says it is 4 (one quad package) high gain inverting op-amps LM324 with a 3-6" wire antenna as input and LED as output.
The configuration of the inverting circuit is also confusing to me, is it correct to put R1 to ground?
And how to analyze when Vout = -Vin(Rf/R1)?
Here's the link to the circuit again. Also- the author of this circuit has written a number of great circuits and electrical articles.
**broken link removed**
Also- I am trying to build a cell phone (900MHz) simple signal detector, please help with theory and circuitry.
Thanks in advance-
Nora