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- Newsgroups: sci.electronics
- Path: sparky!uunet!ftpbox!mothost!pts1!mcc44!more_da
- From: more_da@pts4.pts.mot.com (Dan Morera)
- Subject: Hot Tub Controller
- Message-ID: <1992Dec17.165633.9685@pts1.pts.mot.com>
- Sender: usenet@pts1.pts.mot.com
- Nntp-Posting-Host: 145.4.50.213
- Reply-To: more_da@pts4.pts.mot.com
- Organization: Paging and Wireless Data Group
- Date: Thu, 17 Dec 1992 16:56:33 GMT
- Lines: 29
-
-
- Greetings and Happy Holidays Netters,
-
- I am developing a system to remotely control a hot tub, and I have not
- previously worked with the large AC voltages needed to do so.
-
- The hot tub is powered by both phases of the 120V power entering the house. The switch
- next to the tub does nothing more than connect / disconnect both of the powers from
- continuing to the blower / heater / pump of the hot tub. What I envision doing is
- putting two solid state relays in series with the switches, and control the relays
- with some simple 5V logic.
-
- The lines are rated at 60 Amps each, so I have 75 Amp relays with sufficient heat
- sinking capabilities. The entire circuit will be placed in an environmentally sound
- box. Also, the wires connecting the relays to the switch are rated at 60 Amps. The
- logic controlling the relays have 20 mA sink current specifications.
-
- What I want to know is if I left anything out. I want this to be safe, but I don't
- want to pay a contractor to do the work for me (which I may anyway).
-
- Any comments or opinions would be appreciated.
-
- ---
- *********************************************************************
- * "Could be worse -- could be raining." * Daniel Morera *
- *********************************************************************
- * "No walruses, please" * more_da@pts4.pts.mot.com *
- *********************************************************************
-
-