BTW - The only write-ups I found that was somewhat close to what I am looking for if for the HC-SR04 which is the PING version that has 4 prongs +,-, Trigger and Echo. The model I have only has 3 +,- and SIG.
BTW - The only write-ups I found that was somewhat close to what I am looking for if for the HC-SR04 which is the PING version that has 4 prongs +,-, Trigger and Echo. The model I have only has 3 +,- and SIG.