Everyone else is doing it HC-SR04
November 26, 2011
Ok, Ok... You convinced me! I broke down and bought a few of these El Cheapo SRF05 knock-offs (HC-SR04). It was Jax saying he got his working that put me over the top. Now the real question is --is there any way to convert this 4-pin set-up to a 3-pin set-up? Currently, trigger and echo are on different pins, is there any way to connect them? I figure diodes would be in order, but for the life of me, and after a bunch of sketches, I can't seem to figure it out. Thoughts?