This article documents an implementation of PAROT (Power Amplifier Run On Timer) using Transformerless power supply for PAROT.
This PAROT uses a 230V AC relay for 230V mains switching and includes PTT switching using an FOD852 opto coupler.
The intended application is to control power to a valve PA, providing programmable heater delay, and cool down delay of power off.
Above is the electronics built on a small piece of Veroboard. This one uses a 0.47µF cap as the power supply current requirements are a little lower than for the SSR. Continue reading PAROT with transformerless power supply and 230V AC relay