- Resistor colours - 9 Updates
- More EPROM stuff - 2 Updates
| Cursitor Doom <cd@notformail.com>: Dec 10 09:55PM Anyone else find it bizarre and inexplicable when resistor manufacturers use coloured bodies for their resitors? The subsequent coded bands become *far* more difficult to read. |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Dec 10 02:00PM -0800 Generally, there is a reason for those colors. The Internet is your friend in figuring out why. Peter Wieck Melrose Park, PA |
| John Robertson <spam@flippers.com>: Dec 10 02:30PM -0800 On 2019/12/10 1:55 p.m., Cursitor Doom wrote: > Anyone else find it bizarre and inexplicable when resistor > manufacturers use coloured bodies for their resitors? The subsequent > coded bands become *far* more difficult to read. And some of us (7-10% male, <1% female) are red/green colour challenged, so green and brown can look the same at the best of times... I use an ohmmeter to verify as I can't trust my colour vision. John :-#)# |
| Fox's Mercantile <jdangus@att.net>: Dec 10 08:07PM -0600 On 12/10/19 3:55 PM, Cursitor Doom wrote: > Anyone else find it bizarre and inexplicable when resistor > manufacturers use coloured bodies for their resitors? The > subsequent coded bands become *far* more difficult to read. Don't get out much do you? Allen Bradly, and most other carbon composition resistor manufacturers used a brown composition body. When film resistors started to become popular, they had white bodies. The only other color I've seen is a dull red, Usually on 2% resistors. Of course, wire wound resistors had colors all over the map. But then they had the values printed on them. No color code. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| bilou <bilou@sfr.fr>: Dec 11 11:18AM +0100 On 11/12/2019 03:07, Fox's Mercantile wrote: > Of course, wire wound resistors had colors all over the > map. But then they had the values printed on them. No color > code. Black color is the right choice for anything expected to dissipate energy. Integrated circuits is a good example. smc components another. |
| tabbypurr@gmail.com: Dec 11 04:41AM -0800 On Wednesday, 11 December 2019 10:18:43 UTC, bilou wrote: > dissipate energy. > Integrated circuits is a good example. > smc components another. By the time it's hot enough for that to matter it's already toast. The other colours are close to black in IR performance. NT |
| Stephen Wolstenholme <steve@easynn.com>: Dec 11 12:43PM On Tue, 10 Dec 2019 14:30:10 -0800, John Robertson <spam@flippers.com> wrote: >And some of us (7-10% male, <1% female) are red/green colour challenged, >so green and brown can look the same at the best of times... I use an >ohmmeter to verify as I can't trust my colour vision. My colour vision works OK but I still check resistance with a meter. Steve -- http://www.npsnn.com |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Dec 11 06:52AM -0800 Mpfff.... Resistor body colors are indicative of their composition, nature, tolerance, and generally follow convention. https://makezine.com/2013/04/01/component-of-the-month-resistors/ It is not random. Peter Wieck Melrose Park, PA |
| Ralph Mowery <rmowery28146@earthlink.net>: Dec 11 10:33AM -0500 In article <ljo1vetcm9g71bikp93ab33s16btt27jmo@4ax.com>, steve@easynn.com says... > My colour vision works OK but I still check resistance with a meter. My vision is fine also,but like you I still check the older resistors. I have many new carbon resistors that are over 40 years old. Some are very close in value and some are out of the 10% range they are suppose to be. Some are 1 and 2 watt Allen Bradely and they are in packs of about 25. Out of that pack I may find one or two that are outside the 10% range. Some not much , some are around 30% off. Hard to believe that some could change so much while never used and only a few inches away in the same package. |
| Dave M <dgminala at mediacombb dot net>: Dec 10 05:46PM -0600 Eric, The "Verify" feature doesn't compute a checksum for the data. After the device is programmed, the Verify simply reads the contents of the device and compares it, bit by bit, with the original data file.. If the contents of the device are the same as the original data file, then the device is verified as being successfully programmed. It's usually a good idea the run the verify function 3 or 4 times, just to be absolutely certain that the device has the correct data. If the verify function returns an error, that means that the device either didn't accept the data correctly, it might have not been completely erased, or it might just be a bad device. Cheers, Dave M |
| etpm@whidbey.com: Dec 10 04:36PM -0800 On Tue, 10 Dec 2019 17:46:03 -0600, Dave M <dgminala at mediacombb dot net> wrote: >erased, or it might just be a bad device. >Cheers, >Dave M It seems to me that the best way to test the chips after programming and using the verify function is to just place them back into the machine and make sure the machine runs correctly. If the machine functions all work then the chip must be good. But I will run the verify test a few times on each chip just for luck. Eric |
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