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Thread ID: 56048	2005-03-25 22:29:00	Temperature reading onto a TV screen?!	stuffed (1469)	PC World Chat

Post ID	Timestamp	Content	User
338105	2005-03-25 22:29:00	Anyone got any suggestions as to how to get a temperature reading onto a TV screen. Have a front door camera and this is accessible on all the house TV’s (fed from an old VCR – AV in – RF out). Know you can get time/date generators so just need a unit that is similar. Prefer not to have to do it through a PC. Appreciate any pointers. Many thanks	stuffed (1469)
338106	2005-03-25 23:17:00	Not aware of anything on the market that does that. There used to be a kit available to put text overlay on a video stream, but have not seen that for about 10 years now. Then you would need to construct a temperature sensor and encoder to convert the output to a digital stream, suitable for input to an overlay. I am sure it is all quite possible to do with PLC based technology, but it certainly would be better if a kit was available. Just can't seem to find anything though. [But I like the way you have done it at the moment! 12° at 11:13:56 but you need to set the clock - its still on DST...]	godfather (25)
338107	2005-03-26 00:20:00	Thanks Godfather – don’t you know we are a different time zone down here! Hey do you know of any international forums that might be able to help on this one? There must be someone somewhere that has the gear to do it – without having the sort of budget TVNZ has to do these things!	stuffed (1469)
338108	2005-03-26 09:37:00	If the camera is on all the time, you could hang an ordinary thermometer within the view of the camera. :)	xxll (5902)
338109	2005-03-29 03:57:00	The PICAxe series of BASIC programmable microcontrollers can directly access temerature from the DS18B20 temperature sensors (e . g . "b2=readtemp 4") . They will give a serial output equally easily . I have built a box with the Microchip PIC16F628 and a DS18B20 and an LCD display . . . but that needed assembly code . Among the PIC application notes there's a simple circuit using a 16F84 which will display a few fixed characters on a video monitor . As always, the analogue stuff to make it into TV is a bit harder . :(	Graham L (2)
338110	2005-03-29 04:11:00	Graham – thanks but being a non techo – it is stretching what gray matter there is a little too much! If you know who could make me a working unit – would be happy to negotiate a price……. Many thanks :)	stuffed (1469)
338111	2005-04-05 06:27:00	I've just been reminded of this by seeing a product in the Warehouse . $29 . 99 (special price, probably until midnight tonight ;)) for a "wireless weather station" . It's an electronic thermometer which transmits to a display box . The display shows maximum and minimum in C or F, with a time display . It's hard to beat that sort of price . A unit like the one you want would be very expensive . Just a pair of 433 MHz link units and a TV modulator would cost about $60 . After that, there's the bits you can't buy . I had a quick look at the PAL standards, and can work out how to do the synchronising signals fairly easily, but generating text is "somewhat" more complicated . That's why it's done in a video card in a computer . Doing a nice thing like "window in a window" becomes horrendous .	Graham L (2)
338112	2005-04-05 21:50:00	Graham thanks for that. Am still going to keep digging round - if could land on the moon 35 years ago - am sure mankind can come up with something to do this! Now on a totally separate subject! We have installed CCTV in our town – on a DYO basis – PTZ camera and top of the line DVR – works brilliantly and now some business owners want another camera on the other side of the street! Purchased from Jaycar their TV sender/receiver to try out – ok but the picture quality is not good enough. Where can we go to get close to broadcast quality gear – at a reasonable price?! There must be some good stuff out there – they send video from racing cars etc to a helicopter. Appreciate any comments	stuffed (1469)
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