A big thanks to @AndrewPatience and @JulianWarren for their help in getting the Boileroom airlock doors back in to
working order last night.
1 Like
Wonder if this system would-be wired with silicone PTFE firesafe cable or MICS cable.
Also have 74HC4050 hex buffers and TIP4xC power transistors for interfacing. Investigate use of SLA batteries with summer 97/98 Epemag’s L200C regulator SLA battery float charger or the LiPo shield for floating PSU. Also have circuit from early 80’s Everyday Electronics mag that gives 2 tone ding -dong sound using CMOS 4000 series logic. Have thought about changing to 74HC logic.