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Simplex Mod


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On 3/19/2023 at 5:55 PM, SwingThing said:

I built this but I see that the speaker is still active with the headphones attached. I found by adding a 1kOhm resistor from pin 7 to pin 5 tells the detector a wired headset is attached and mutes the internal speaker.

Here is a photo showing the solder side of the connector with the headphone and USB connections shown (sorry about my drawing of the headphone jack).

 

I never had that problem with my adapter, speaker disconntected when adapter was plugged in.

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Nice mod Sven! 

I like the new position and secure mounting of the adapter to the detector.

I have always found the headphone wire or adapter to be a failure point among multiple headphones or headphones adapter brands. 

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