[USMA:21088] Celsius thermometer display

[kilopascal]

2002-07-14   Why not fix it and make it display correctly?   Do you still have the assembly booklet with the parts list?  Why not look up the part number for the LED display parts and see if they are still available?  Check out the internet for info on Heathkit and see if parts for their assemblies are still for sale somewhere?    http://www.circuitarchive.co.uk/heath.htm   http://www.beacham.com/so_long_heathkit_318.html   Also, you might want to loook at one of the display segments and look at the numbers stamped on the side.  The company that made them might still be around, or it might be a generic part still available at an electronics parts store, such as Radio Shack.  In the 2002 catalog for Radio Shack, page 263, a 7-segment display is a stock item.  The part number is 276-075 and costs 1.79 $.   Now, if the pin-out arrangement is not exactly the same as what yours is, you might have to cut some of the circuit board traces and reconfigure them to make the display read right.   You can also check with Jameco at: http://www.jameco.com/cgi-bin/ncommerce3/ExecMacro/Jameco/searchResult.d2w/report?sort=BKW&search=LED&Go.x=19&Go.y=13   or even Digikey: http://www.digikey.com/  A search on LED's resulted in:   Optoelectronics I/O Modules (2 items) Infrared Detectors / Modules (3 items) LCD Character Displays/Modules (57 items) LCD Displays/Modules (14 items) LCD Graphic Displays/Modules (12 items) LED Arrays/Light Bars/Bar Graphs (132 items) LED Displays (575 items) LED Dot Matrix/Cluster Displays (95 items) LED Hardware (82 items) LED Lenses (61 items) LEDs (840 items) LEDs - PCB & Panel Mount (1151 items) LEDs - SMD (1739 items) Obsolete/Discontinued Part Numbers (144 items) Undefined Family (1 items)   And, while you are repairing it, why not permanently disable its ability to to display those nasty "F" numbers!!   John               ----- Original Message ----- From: Nat Hager III To: U.S. Metric Association Sent: Sunday, 2002-07-14 23:21 Subject: [USMA:21085] RE: Americanization   OK, I'll beat that....  <g>    For *25 years* I've had an old HeathKit sitting on top of the fridge, reading Celsius-only.  It's so old some of the segments are burned out, so it reads with little bits and pieces missing.  I doubt if the Fahrvegnugen setting would even work, since its never been used.   Friends drop by regulary and no one ever comments or complains.  An old friend from grad school dropped by a few days last week, and all we did was complain about the morning temperatures in deg C�.   Nat   BTW, I installed a digital indoor/outdoor thermometer that is displaying in Celsius only.  Some roommates and neighbors ignore it or ask what it means in the old units.  Most of my roommates understand it because they have lived abroad for a few years.  Some people think it is kind of an oddity, but I haven't had much hostility to it.  (It's my thermometer, after all, and I can do what I want with it--they recognize that). At our house all the thermometers, and the two thermostats, register in Celsius only.  My family had no trouble understanding them -- it took them less than a week to understand the new scale of reference.  Carleton