Electronics > Projects, Designs, and Technical Stuff

Help with designing a circuit

(1/1)

redgear:
I am working on a UVC disinfection box. I will be using 4 x 16w UVC tubes from Philips. You can find the data sheet here. The tubes need to be connected to one ballast each. The ballasts are designed to work directly with mains power. I also need to have a timer relay and a temperature sensor to cut-off power automatically when temperature or time limit exceeds. The device should work only when the door is closed. I'm planning to use three microswitches in the same configuration as in a microwave oven. I understand the project is simple and will mostly involve wiring.
 
Here is the basic block diagram of what I have in my mind now.




Questions:
1) How do I safely connect the mains to my device? How do I include ESD protection, earthing and someother protection to keep the current and power limits within safe levels?
2) Is it better to connect the microswitches directly to AC mains or is it better to convert the AC to LVDC and connect the switches to a relay to work only as a signalling device (if the latter is better I think I can go with lower power rated switches)?
3) What other things should I be careful with?

Thanks

Navigation

[0] Message Index

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod