elsey.jack
New Member
Hello, I'm working on a project that involves transmitting data over a set of walkie-talkies. I am using a microcontroller to generate the signal (703 Hz) and a LM567 tone decoder to detect the signal on the other end.
Problem is, I can't get the LM567 to work! The circuit I have set up should turn off the LED when ever a ≈703 Hz signal hits pin 3, but the LED remains lit. Here's is my schematic:
C1 = .1 uF
C2 = 1 uF
C3 = .1 uF
R1 = 12.93 kΩ
R2 = 1 kΩ
Signal voltage = 110 mV AC (square wave)
**broken link removed**
I've looked at the **broken link removed** (which is confusing) and pored over all of the other related threads (which are great ), but I can't figure out what my problem is. Am I maybe getting something about the logic output at pin 8 confused?
Any help would be appreciated,
Jack
Problem is, I can't get the LM567 to work! The circuit I have set up should turn off the LED when ever a ≈703 Hz signal hits pin 3, but the LED remains lit. Here's is my schematic:
C1 = .1 uF
C2 = 1 uF
C3 = .1 uF
R1 = 12.93 kΩ
R2 = 1 kΩ
Signal voltage = 110 mV AC (square wave)
**broken link removed**
I've looked at the **broken link removed** (which is confusing) and pored over all of the other related threads (which are great ), but I can't figure out what my problem is. Am I maybe getting something about the logic output at pin 8 confused?
Any help would be appreciated,
Jack