These hydraulic-over-air relay valves are designed to convert hydraulic modulated input pressure to a proportional output air pressure. Single input design provides one hydraulic pilot port to ...

Ok, software done; on to the relay controller box! [danman]’s sprinkler system has four 12V AC valves that need wrangling, and no data cables, necessitating the wireless setup. Initially ...

But what if all you have on hand is an ESP8266? [TechColab] needed to control a solenoid valve with a short pulse via a solid-state relay (SSR) but found that the trusty 555 timer was tricky to ...

If you value the benefits starter fertilizer offers in corn, you might like the performance of a starter fertilizer relay system even more. The relay system consists of a two-step fertilizer ...