marzban Posted August 14, 2022 Share Posted August 14, 2022 Hello All, I just picked up an AP122 which should have dex and just requires a harness. I found the harness for about $30. Instead of spending that money and waiting for shipping I was hoping to make my own harness since it is just 3 pins. I know the pinout on the board side, but I am not having any luck finding the pinout for the jack side. I find this funny because DEX is a standard yet I can't find the pinout. I know there is a transmit, receive, and ground. Does anyone know what the tip, sleeve, and ring should be connected to? Thanks Link to comment Share on other sites More sharing options...
cvending Posted August 14, 2022 Share Posted August 14, 2022 Just buy one . $18.93 from D&S Vending https://www.dsvendinginc.com/p-1023-d16800044-ap-dex-harness.aspx Link to comment Share on other sites More sharing options...
marzban Posted August 15, 2022 Author Share Posted August 15, 2022 After a little more digging, I found the answer in a microcontroller forum. If you are like me and interested in the nitty gritty details you can read about it: https://www.avrfreaks.net/forum/dex-interface-vending-machine-how-does-vending-machine-device-vmd-detect TL;DR Tip: Transmit data from device Ring: Receive data to device Sleeve: Signal ground Link to comment Share on other sites More sharing options...
AngryChris Posted August 15, 2022 Share Posted August 15, 2022 5 minutes ago, marzban said: After a little more digging, I found the answer in a microcontroller forum. If you are like me and interested in the nitty gritty details you can read about it: https://www.avrfreaks.net/forum/dex-interface-vending-machine-how-does-vending-machine-device-vmd-detect TL;DR Tip: Transmit data from device Ring: Receive data to device Sleeve: Signal ground That's way too technical for 95% of us here. Link to comment Share on other sites More sharing options...
AZVendor Posted August 15, 2022 Share Posted August 15, 2022 No one is interested in the nitty gritty of it because you can just buy a harness and use it. Link to comment Share on other sites More sharing options...
marzban Posted August 15, 2022 Author Share Posted August 15, 2022 7 minutes ago, AngryChris said: That's way too technical for 95% of us here. Well, I'm an engineer, we tend to overcomplicate things 😜. And now this information is on the internet if another nerd like me comes along looking for this information. Link to comment Share on other sites More sharing options...
marzban Posted August 15, 2022 Author Share Posted August 15, 2022 1 minute ago, AZVendor said: No one is interested in the nitty gritty of it because you can just buy a harness and use it. In my case, I have the spare parts to make a harness in a few minutes instead of spending $30 and waiting for shipping. I can buy a lot of vending snacks for $30 LOL Link to comment Share on other sites More sharing options...
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