Thanks never thought of thatSomething from Aliexpress, or just use an arduino or an esp8266 board to have wifi control - 'Alexa, lower the TV'
Bought one of these as it will be good to teach winchboy and I, So how do I make one of those alexa things drop my Telly? Obviously I want to do it on the cheap!Something from Aliexpress, or just use an arduino or an esp8266 board to have wifi control - 'Alexa, lower the TV'
Bought one of these as it will be good to teach winchboy and I, So how do I make one of those alexa things drop my Telly? Obviously I want to do it on the cheap!
https://www.ebay.co.uk/itm/RFID-Lea...h=item3d7bbbf233:g:GisAAOSwpTBcA214:rk:7:pf:0
Arduino, raspberry pi or similar?
Once you start getting into “brand name” plcs then it starts to get expensive for software, programming cables etc which for one project probably wouldn’t be worth it.
Yes, that was my point - if you start looking at a plc from Mitsubishi/Siemens etc you are looking at a whole heap more, plus the software cable etcThe Arduino boards start at about £3 on ebay!
I got a basic arduino a while back, it seemed pretty straightforward to get it to do (admittedly fairly basic) things, but I’ve not had chance to play with it as much as I’d have liked. There are lots of ideas on the Internet and people using them for all sorts of pretty clever stuff so I’m sure it would do what you want.I will have a mess about with the one I have ordered and see how I get on
I use Siemens logo plc for small gadgets
PLC's are great things and have made control design much easier ,reliable and compact. I got asked to quote a repair job Monday and was asked 'you do know what plcs are?'
I thought to myself that everyone who hasn't worked with them thinks they are terrifying but the old relay logic cabinets the size of busses were terrifying ! Though thermal imaging camera's made life eaier with those things. Sorry for going off topic
My day job is writing plc/scada/dcs software as well as faultfinding/commissioning them.
I've worked on both sides, and having cabinets full of relays and contactors could be a nightmare to fault find on, though it was usually (!!) a fairly simple fix once you knew what was wrong. PLC's tend not to go wrong very often, though depending how good the code is inside them and what the fault is they can just as easily end up as a useless brick!! If you have a knowledge of the code inside and it's well written and commented correctly then you have a chance - if it's a programming error. Trying to reverse engineer what someone else has designed with no comments can be maddening though!!
You didn't get comments on the early PLC's, just a huge printout of the programme with the comments/functions added, we used to have some printouts the best part of 2" thick, which you had cross reference with what you had on the screen.
Didn't have laptops in those days either
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There was some yank machines I worked on, forget the make that used Omron plcs. Some out put circuits were protected but some were not. At first they were a pain because the IO lights would activate but the internal circuitry was goosed and not give enough out put to activate the solenoid, but until you knew that you was looking for relays not there!