Post by thread:[PIC]: Color blindness and resistors (was Puzzling

why not just measure it with an ohm meter? ----- Original Message ----- From: "Bob Ammerman" <spam_OUTrammermanTakeThisOuTADELPHIA.NET> To: <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> Sent: Friday, July 11, 2003 11:02 PM Subject: Re: [PIC]: Color blindness and resistors (was Puzzling non-reset behavior) > Hey, we can bring this thread back to [PIC]:! > > How about building a scanning colorimeter using a PIC. Just scan the > resistor with a wand and the PIC computes and displays its value. > > Bob Ammerman > RAm Systems > > ----- Original Message ----- > From: "Jan-Erik Svderholm XA (TN/PAC)" <jan-erik.xa.soderholmKILLspamERICSSON.COM> {Quote hidden}> To: <.....PICLISTKILLspam.....MITVMA.MIT.EDU> > Sent: Friday, July 11, 2003 8:52 AM > Subject: Re: [PIC]: Puzzling non-reset behavior > > > > Couldn't it have the *names* of the colors insted > > on the wheels ? Like "red", "green" and so on. > > > > Jan-Erik. > > > > Oh, nearly forgot the " :-) " :-) > > > > > > Alex Kilpatrick wrote: > > > It has three wheels. You "dial in" the colors on the resistor and read > > > off the values in a window at the bottom. It is made of cardboard. It {Quote hidden}> > > won't help if you are colorblind. > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

On Fri, 11 Jul 2003, Bob Ammerman wrote: > Hey, we can bring this thread back to [PIC]:! > > How about building a scanning colorimeter using a PIC. Just scan the > resistor with a wand and the PIC computes and displays its value. I like the idea of a PIC resistance meter with a little LCD -- or better yet, LCD and Morse code audio readout for the visually impaired. I was partway through hashing out a design that would be good from < 10 to > 10M Ohms when I decided what I do NOT need is Yet Another Project. My Fluke DMM will do just fine when I can't tell for sure. Dale -- It's a thankless job, but I've got a lot of Karma to burn off. Get a PicoKeyer: http://www.hamgadgets.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> > > On Fri, 11 Jul 2003, Bob Ammerman wrote: > > > Hey, we can bring this thread back to [PIC]:! > > > > How about building a scanning colorimeter using a PIC. Just > scan the > > resistor with a wand and the PIC computes and displays its value. > Here is another idea for a PIC resistor project. Make a resistor "sorter" that works like those coin sorting things. You dump in a handful of resistors, and the PIC measures the resistance of each one (electrically or visually) and pushes them into designated containers. Alex -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

How about just a resistor/capacitor bridge type of tester where you plug in the unknown part and the LCD displays the value. If you're easily offended delete this message now, otherwise scroll way down. dave. Way back when, I memorized the "bad boys rape our young women but violet gives willingly get some now" technique. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> > > My windows based calculator will give you color codes for > resistor http://www.piclist.com/techref/app/calcs.htm > Only works one way though (value > colors) but it's far more > impressive than a bit of cardboard > > Peter Cousens > cousensspam_OUTbiscit.biz > How is it more impressive than a piece of cardboard? The carboard goes both ways. :-) It is a nice calculator, btw. You should show the colors instead of just their names. That shouldn't be too hard in VB. Alex -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

I now KNOW that you're an older guy, Dave. I remember that particular rhyme well. I just can't see the colors... Have a good day.. --Bob At 01:37 PM 7/11/2003 -0400, you wrote: {Quote hidden}>How about just a resistor/capacitor bridge type of tester where you plug in >the unknown part and the LCD displays the value. > >If you're easily offended delete this message now, otherwise scroll way down. > >dave. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >Way back when, I memorized the "bad boys rape our young women but violet >gives willingly get some now" technique. > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> >It is a nice calculator, btw. You should show the colors instead of >just their names. That shouldn't be too hard in VB. For a step beyond color blindness, type out the correct name, in the wrong color. ie: Two = RED (printed in blue) http://www.mixsig.net/ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

I learned it as "Bad Boys Ravish Our Young Girls Behind Victory Garden Walls: Get Some Now" ----- Original Message ----- From: "Jeremy Darling" <KILLspamjdarlingKILLspamASKPIONEER.COM> To: <RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU> Sent: Friday, July 11, 2003 2:55 PM Subject: Re: [PIC]: Color blindness and resistors (was Puzzling non-reset behavior) Wow your the first person that I know of that herd that in school besides me and my class mates :). Our teacher thought it had died because of PC Issues. {Original Message removed}

On Fri, 11 Jul 2003, d platt wrote: > I learned it as "Bad Boys Ravish Our Young Girls Behind Victory Garden > Walls: Get Some Now" When I was in high school it was "Big boys race our young girls but Violet generally wins". We were in the suburbs, I guess. 8-) Dale -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

source= http://www.piclist.com/postbot.asp?id=piclist\2003\07\11\090649a Bob Ammerman said "How about building a scanning colorimeter using a PIC. Just scan the resistor with a wand and the PIC computes and displays its value." Jake Anderson replied "why not just measure it with an ohm meter?" Typical engineer. Total lack of imagination. <GRIN> Seriously, I agree with Bob that a small device that at least reads out the amount of RG and B in the surface you point it at would be an interesting, useful, and possibly humanitarian project. Adding the code to calc the resistor value would probably be less valuable than just useing a DVM, but there are many places where a color blind engineer could use a little pocket pen that can see colors and seperate them into Red, Green and Blue-Violet LEDs. Does such a thing exist? I couldn't find it on Google. --- James Newton: PICList.com webmaster, former Admin #3 spamBeGonejamesnewtonspamBeGonepiclist.com 1-619-652-0593 phone http://www.piclist.com/member/JMN-EFP-786 PIC/PICList FAQ: http://www.piclist.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>Seriously, I agree with Bob that a small device that at least reads out the >amount of RG and B in the surface you point it at would be an interesting, >useful, and possibly humanitarian project. Adding the code to calc the >resistor value would probably be less valuable than just useing a DVM, but >there are many places where a color blind engineer could use a little >pocket >pen that can see colors and seperate them into Red, Green and Blue-Violet >LEDs. > >Does such a thing exist? I couldn't find it on Google. I've seen little gadgets which "see" colors, but they're usually prohibitively expensive...I'm wondering if one could use three (or four or whatever) individual cells with individual sheets of theatrical gel paper to narrow the bandwidth that strikes the sensor. Has anyone experimented with this? IIRC, the last time I looked at gel paper samplers, they had a very explicit curve defined for the light they will pass. If you were to combine that with the curve defined for the response of a photodiode and then individually adjust the gain... Am I on the right track? Mike H. _________________________________________________________________ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

At 07:01 PM 7/13/2003 -0700, you wrote: >source= http://www.piclist.com/postbot.asp?id=piclist\2003\07\11\090649a > >Bob Ammerman said "How about building a scanning colorimeter using a PIC. >Just scan the resistor with a wand and the PIC computes and displays its >value." > >Jake Anderson replied "why not just measure it with an ohm meter?" > >Typical engineer. Total lack of imagination. <GRIN> > >Seriously, I agree with Bob that a small device that at least reads out the >amount of RG and B in the surface you point it at would be an interesting, >useful, and possibly humanitarian project. Adding the code to calc the >resistor value would probably be less valuable than just useing a DVM, but >there are many places where a color blind engineer could use a little pocket >pen that can see colors and seperate them into Red, Green and Blue-Violet >LEDs. > >Does such a thing exist? I couldn't find it on Google. Hi, James:- There was such a project in Nuts & Volts a few years (like maybe 6) ago. It used a bunch of different color LEDs and a PIC to sequentially illuminate the surface under test and measure the reflected light. Don't know how well it worked. Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" TakeThisOuTspeffEraseMEspam_OUTinterlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

It can be done, it takes a full spectrum light source focused to a small dot, and 3 optical pickups with red, green and blue filters focused at the same dot. The filters used to be available from Kodak, and may be available from the astronomy community. Use 3 optical detectors with output to 3, 8 bit A to Ds. Use the output to generate a word similar to the 6 byte hex word used in http lingo to specify screen color, convert the hex word to meaningful text data. Looks like a great job for a pic...this could keep someone busy for quite a few days. Vern "James Newton, webhost" wrote: {Quote hidden}> > source= http://www.piclist.com/postbot.asp?id=piclist\2003\07\11\090649a > > Bob Ammerman said "How about building a scanning colorimeter using a PIC. > Just scan the resistor with a wand and the PIC computes and displays its > value." > > Jake Anderson replied "why not just measure it with an ohm meter?" > > Typical engineer. Total lack of imagination. <GRIN> > > Seriously, I agree with Bob that a small device that at least reads out the > amount of RG and B in the surface you point it at would be an interesting, > useful, and possibly humanitarian project. Adding the code to calc the > resistor value would probably be less valuable than just useing a DVM, but > there are many places where a color blind engineer could use a little pocket > pen that can see colors and seperate them into Red, Green and Blue-Violet > LEDs. > > Does such a thing exist? I couldn't find it on Google. > > --- > James Newton: PICList.com webmaster, former Admin #3 > RemoveMEjamesnewtonTakeThisOuTpiclist.com 1-619-652-0593 phone > http://www.piclist.com/member/JMN-EFP-786 > PIC/PICList FAQ: http://www.piclist.com > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservEraseME.....mitvma.mit.edu with SET PICList DIGEST in the body

I know, I joked... Jan-Erik. Jo Scherpenisse wrote: {Quote hidden}>I can show you different resistors with rings on both ends at no difference >in distance!! >The only difference is a somewhat thicker line, but hardly visible. > > Jan-Erik wrote : >> >> The ring closest to the end. >> >> :-) >> >> Jan-Erik. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email RemoveMElistservEraseMEEraseMEmitvma.mit.edu with SET PICList DIGEST in the body