From jsedivy2001 at yahoo.com Thu Sep 1 15:52:34 2005 From: jsedivy2001 at yahoo.com (J) Date: Thu, 1 Sep 2005 13:52:34 -0700 (PDT) Subject: [Wbo2] (no subject) Message-ID: <20050901205234.54428.qmail@web53511.mail.yahoo.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050901/0cd5b552/attachment.html From Crash813 at sbcglobal.net Sun Sep 18 09:29:44 2005 From: Crash813 at sbcglobal.net (Tommy) Date: Sun, 18 Sep 2005 09:29:44 -0500 Subject: [Wbo2] simple warning LED display Message-ID: <008d01c5bc5d$6a4f00b0$7651f346@crash> I?ve been on a search to find a very simple LED display for a wideband unit. What I want is a simple 1 led warning light that will trigger when I get a lean voltage. I don?t want to monitor the range all the time. I just want a single led to come on with a AFR of 15 or greater. A light that when at WOT, I?ll know something is wrong without having the interior of the car look like a disco club. If anyone has any ideas, links, past projects, etc I would be very appreciative. Thanks Tommy -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050918/e653150e/attachment.html From J_Holland at btopenworld.com Sun Sep 18 12:02:21 2005 From: J_Holland at btopenworld.com (James Holland) Date: Sun, 18 Sep 2005 18:02:21 +0100 Subject: [Wbo2] simple warning LED display References: <008d01c5bc5d$6a4f00b0$7651f346@crash> Message-ID: <001801c5bc72$bd691000$4e158356@JAMES> Consider using a comparator circuit, something like an LM319 would be OK. ----- Original Message ----- From: Tommy To: wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 3:29 PM Subject: [Wbo2] simple warning LED display I?ve been on a search to find a very simple LED display for a wideband unit. What I want is a simple 1 led warning light that will trigger when I get a lean voltage. I don?t want to monitor the range all the time. I just want a single led to come on with a AFR of 15 or greater. A light that when at WOT, I?ll know something is wrong without having the interior of the car look like a disco club. If anyone has any ideas, links, past projects, etc I would be very appreciative. Thanks Tommy -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 ------------------------------------------------------------------------------ _______________________________________________ Wbo2 mailing list Wbo2 at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/wbo2 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050918/24824030/attachment.html From J_Holland at btopenworld.com Sun Sep 18 12:50:21 2005 From: J_Holland at btopenworld.com (James Holland) Date: Sun, 18 Sep 2005 18:50:21 +0100 Subject: [Wbo2] simple warning LED display Message-ID: <004c01c5bc79$70b39850$4e158356@JAMES> I spoke too soon, I just had a look at the actual numbers. The difference between stoich and 15:1 is only around 0.025V which is around 1%, that would need a very high degree of accuracy, a precision reference, a comparator with a pretty good spec (LM139 maybe) and 0.1% resistors. It might be possible, what sort of operating temperature range are you aiming for? ----- Original Message ----- From: James Holland To: Tommy ; wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 6:02 PM Subject: Re: [Wbo2] simple warning LED display Consider using a comparator circuit, something like an LM319 would be OK. ----- Original Message ----- From: Tommy To: wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 3:29 PM Subject: [Wbo2] simple warning LED display I?ve been on a search to find a very simple LED display for a wideband unit. What I want is a simple 1 led warning light that will trigger when I get a lean voltage. I don?t want to monitor the range all the time. I just want a single led to come on with a AFR of 15 or greater. A light that when at WOT, I?ll know something is wrong without having the interior of the car look like a disco club. If anyone has any ideas, links, past projects, etc I would be very appreciative. Thanks Tommy -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 ---------------------------------------------------------------------------- _______________________________________________ Wbo2 mailing list Wbo2 at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/wbo2 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050918/32ac7c6b/attachment.html From Crash813 at sbcglobal.net Sun Sep 18 13:34:04 2005 From: Crash813 at sbcglobal.net (Tommy) Date: Sun, 18 Sep 2005 13:34:04 -0500 Subject: [Wbo2] simple warning LED display In-Reply-To: <004c01c5bc79$70b39850$4e158356@JAMES> Message-ID: <00a701c5bc7f$8c2d3a90$7651f346@crash> Sorry James, and everyone else, but this is way over my head. I have a very basic understanding of electronics. Basically I know the difference between a resistor and a capacitor?.but not beyond that to any certainty. The 15:1 doesn?t have to be precise, the led can trigger at stoich ~ 2.5v. I only want the led to come on at this voltage or higher. I shouldn?t be anywhere near stoich at WOT so if the light comes on, I know there is a problem, ie. Additional injectors failed, clogged filter, etc. Operating temp? Not a clue. I was figuring this could be done in a simple circuit, but not so sure anymore. Atleast simple to me. Thanks again -----Original Message----- From: James Holland [mailto:J_Holland at btopenworld.com] Sent: Sunday, September 18, 2005 12:50 PM To: Tommy; wbo2 at diy-efi.org Subject: Re: [Wbo2] simple warning LED display I spoke too soon, I just had a look at the actual numbers. The difference between stoich and 15:1 is only around 0.025V which is around 1%, that would need a very high degree of accuracy, a precision reference, a comparator with a pretty good spec (LM139 maybe) and 0.1% resistors. It might be possible, what sort of operating temperature range are you aiming for? ----- Original Message ----- From: HYPERLINK "mailto:J_Holland at btopenworld.com"James Holland To: HYPERLINK "mailto:Crash813 at sbcglobal.net"Tommy ; HYPERLINK "mailto:wbo2 at diy-efi.org"wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 6:02 PM Subject: Re: [Wbo2] simple warning LED display Consider using a comparator circuit, something like an LM319 would be OK. ----- Original Message ----- From: HYPERLINK "mailto:Crash813 at sbcglobal.net"Tommy To: HYPERLINK "mailto:wbo2 at diy-efi.org"wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 3:29 PM Subject: [Wbo2] simple warning LED display I?ve been on a search to find a very simple LED display for a wideband unit. What I want is a simple 1 led warning light that will trigger when I get a lean voltage. I don?t want to monitor the range all the time. I just want a single led to come on with a AFR of 15 or greater. A light that when at WOT, I?ll know something is wrong without having the interior of the car look like a disco club. If anyone has any ideas, links, past projects, etc I would be very appreciative. Thanks Tommy -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 _____ _______________________________________________ Wbo2 mailing list Wbo2 at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/wbo2 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050918/d8644864/attachment.html From J_Holland at btopenworld.com Sun Sep 18 13:56:45 2005 From: J_Holland at btopenworld.com (James Holland) Date: Sun, 18 Sep 2005 19:56:45 +0100 Subject: [Wbo2] simple warning LED display References: <00a701c5bc7f$8c2d3a90$7651f346@crash> Message-ID: <009201c5bc82$b7ad3780$4e158356@JAMES> If stoich is OK then that makes things a lot simpler, 2.5V is a 'standard' voltage and an LM139 can sink enough current for an LED. If you like I will sketch out a circuit that you could build on some veroboard. ----- Original Message ----- From: Tommy To: 'James Holland' ; wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 7:34 PM Subject: RE: [Wbo2] simple warning LED display Sorry James, and everyone else, but this is way over my head. I have a very basic understanding of electronics. Basically I know the difference between a resistor and a capacitor?.but not beyond that to any certainty. The 15:1 doesn?t have to be precise, the led can trigger at stoich ~ 2.5v. I only want the led to come on at this voltage or higher. I shouldn?t be anywhere near stoich at WOT so if the light comes on, I know there is a problem, ie. Additional injectors failed, clogged filter, etc. Operating temp? Not a clue. I was figuring this could be done in a simple circuit, but not so sure anymore. Atleast simple to me. Thanks again -----Original Message----- From: James Holland [mailto:J_Holland at btopenworld.com] Sent: Sunday, September 18, 2005 12:50 PM To: Tommy; wbo2 at diy-efi.org Subject: Re: [Wbo2] simple warning LED display I spoke too soon, I just had a look at the actual numbers. The difference between stoich and 15:1 is only around 0.025V which is around 1%, that would need a very high degree of accuracy, a precision reference, a comparator with a pretty good spec (LM139 maybe) and 0.1% resistors. It might be possible, what sort of operating temperature range are you aiming for? ----- Original Message ----- From: James Holland To: Tommy ; wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 6:02 PM Subject: Re: [Wbo2] simple warning LED display Consider using a comparator circuit, something like an LM319 would be OK. ----- Original Message ----- From: Tommy To: wbo2 at diy-efi.org Sent: Sunday, September 18, 2005 3:29 PM Subject: [Wbo2] simple warning LED display I?ve been on a search to find a very simple LED display for a wideband unit. What I want is a simple 1 led warning light that will trigger when I get a lean voltage. I don?t want to monitor the range all the time. I just want a single led to come on with a AFR of 15 or greater. A light that when at WOT, I?ll know something is wrong without having the interior of the car look like a disco club. If anyone has any ideas, links, past projects, etc I would be very appreciative. Thanks Tommy -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -------------------------------------------------------------------------- _______________________________________________ Wbo2 mailing list Wbo2 at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/wbo2 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 ------------------------------------------------------------------------------ _______________________________________________ Wbo2 mailing list Wbo2 at diy-efi.org http://lists.diy-efi.org/mailman/listinfo/wbo2 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050918/49d6e85c/attachment.html From bcroe at juno.com Sun Sep 18 23:19:15 2005 From: bcroe at juno.com (bcroe at juno.com) Date: Sun, 18 Sep 2005 23:19:15 -0500 Subject: [Wbo2] simple warning LED display Message-ID: <20050918.232820.968.8.bcroe@juno.com> My LED bar graph display for the DIY-WB does what you want. Except it tells you HOW lean it is, by the length of the red LED bar. It does the same for rich, with a green bar. Leave out the extra LEDS for less info. A single LED would be like an idiot light for temperature; it isn't nearly as useful as a temperature gauge. Bruce Roe 18 Sep 2005 "Tommy" writes: > I?ve been on a search to find a very simple LED display for a > wideband > unit. What I want is a simple 1 led warning light that will trigger > when I get a lean voltage. I don?t want to monitor the range all > the > time. I just want a single led to come on with a AFR of 15 or > greater. > A light that when at WOT, I?ll know something is wrong without > having > the interior of the car look like a disco club. If anyone has any > ideas, links, past projects, etc I would be very appreciative. > > Thanks > Tommy From crash813 at sbcglobal.net Wed Sep 21 13:49:54 2005 From: crash813 at sbcglobal.net (Tom Hill) Date: Wed, 21 Sep 2005 11:49:54 -0700 (PDT) Subject: [Wbo2] More LED display help Message-ID: <20050921184955.77970.qmail@web81205.mail.yahoo.com> Thank you guys for all the advice so far. I'm trying to decide if I want to do the simple 1 LED at STOICH or a 10 led for the whole range. The 20 led is just too much. I'm been researching alot on the 3914 chip to display the 0 - 5v range and that would be fine, but I'm wondering if its possible to just show the 0 - 3v range of the 5v signal and segment that into 10 steps? The 3914 datasheet is almost confusing me more than helping. I'd appreciate it if somehere here with obviously better electrical skills than me can tell me if its possible and how to adjust it to make it so. Here is the schematic for the 0 - 5v signal off the datasheet. http://www.crash813.com/other/LM3914.jpg thanks Tommy -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050921/0e6dd2c6/attachment.html From bcroe at juno.com Wed Sep 21 17:39:28 2005 From: bcroe at juno.com (bcroe at juno.com) Date: Wed, 21 Sep 2005 17:39:28 -0500 Subject: [Wbo2] More LED display help Message-ID: <20050921.182548.908.1.bcroe@juno.com> What WB unit are you using? The outputs vary. A data sheet is not a complete design. You need a power supply, noise and power spike filters if the thing is to be practical. Taking an existing design and scaling it down is a good solution. If you just want to see lean, you could use a NB sensor. Bruce Roe 21 Sep 2005 Tom Hill writes: > Thank you guys for all the advice so far. I'm trying to decide if I > want to do the simple 1 LED at STOICH or a 10 led for the whole > range. The 20 led is just too much. I'm been researching alot on > the 3914 chip to display the 0 - 5v range and that would be fine, > but I'm wondering if its possible to just show the 0 - 3v range of > the 5v signal and segment that into 10 steps? The 3914 datasheet is > almost confusing me more than helping. I'd appreciate it if > somehere here with obviously better electrical skills than me can > tell me if its possible and how to adjust it to make it so. > > Here is the schematic for the 0 - 5v signal off the datasheet. > > http://www.crash813.com/other/LM3914.jpg > > thanks Tommy From Crash813 at sbcglobal.net Wed Sep 21 21:09:10 2005 From: Crash813 at sbcglobal.net (Tommy) Date: Wed, 21 Sep 2005 21:09:10 -0500 Subject: [Wbo2] RE: More LED display help In-Reply-To: <20050921.182548.908.1.bcroe@juno.com> Message-ID: <00f601c5bf1a$9f1add40$7651f346@crash> Using a Zeitronix unit with bosch sensor. The unit sends out a WB signal for connection with ECU which I was going to use for the sensor. Planning on using this with a LM340 voltage regulator. -----Original Message----- From: bcroe at juno.com [mailto:bcroe at juno.com] Sent: Wednesday, September 21, 2005 5:39 PM To: crash813 at sbcglobal.net Cc: wbo2 at diy-efi.org Subject: More LED display help What WB unit are you using? The outputs vary. A data sheet is not a complete design. You need a power supply, noise and power spike filters if the thing is to be practical. Taking an existing design and scaling it down is a good solution. If you just want to see lean, you could use a NB sensor. Bruce Roe 21 Sep 2005 Tom Hill writes: > Thank you guys for all the advice so far. I'm trying to decide if I > want to do the simple 1 LED at STOICH or a 10 led for the whole > range. The 20 led is just too much. I'm been researching alot on > the 3914 chip to display the 0 - 5v range and that would be fine, > but I'm wondering if its possible to just show the 0 - 3v range of > the 5v signal and segment that into 10 steps? The 3914 datasheet is > almost confusing me more than helping. I'd appreciate it if > somehere here with obviously better electrical skills than me can > tell me if its possible and how to adjust it to make it so. > > Here is the schematic for the 0 - 5v signal off the datasheet. > > http://www.crash813.com/other/LM3914.jpg > > thanks Tommy -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.3/107 - Release Date: 9/20/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.3/107 - Release Date: 9/20/2005 From ichoi at telus.net Tue Sep 27 23:10:51 2005 From: ichoi at telus.net (Ivan(In) Choi) Date: Tue, 27 Sep 2005 21:10:51 -0700 Subject: [Wbo2] LED brighter when sensor not connected? Message-ID: <001501c5c3e2$9d3ccd40$7ba9d8cf@amdgeni> I having problem with heater circuit. my low drop regulator was overheating even with good heatsink on. so I changed to lm317 and put even bigget heatsink. now LED comes on and heater voltage stabilizes at 10.4 V. but LED is now a little dimmer than when I test with sensor disconected. is this normal? or I need more voltage? 1086 was overheating crazy though it start 4V OK but like a second after it stop rising and drops to 1V right away and it's crazy hot.. BTW I'm using L2H2 sensor. either regulator wasn't working without car running so I guess no advantage having 1086. just dim Led bothers me.. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050927/7d389c0d/attachment.html From bcroe at juno.com Wed Sep 28 13:19:41 2005 From: bcroe at juno.com (bcroe at juno.com) Date: Wed, 28 Sep 2005 13:19:41 -0500 Subject: [Wbo2] LED brighter when sensor not connected? Message-ID: <20050928.131941.1148.1.bcroe@juno.com> For openers, you need the anti oscillation capacitor added to the circuit. You need the anti oscillation cap to stabilize the circuit. That is a 0.01 to 0.1 ufd ceramic added across pins 1 and 3 of D5. There are a few other things that can be done to improve the dynamic response of the unit, which tends to overshoot. Bruce Roe 27 Sep 2005 "Ivan\(In\) Choi" writes: > I having problem with heater circuit. > my low drop regulator was overheating even with good heatsink on. > so I changed to lm317 and put even bigget heatsink. > > now LED comes on and heater voltage stabilizes at 10.4 V. > but LED is now a little dimmer than when I test with sensor > disconected. > is this normal? or I need more voltage? > 1086 was overheating crazy though it start 4V OK but like a second > after it stop rising and drops to 1V right away and it's crazy hot.. > BTW I'm using L2H2 sensor. > either regulator wasn't working without car running so I guess no > advantage having 1086. > just dim Led bothers me.. From ichoi at telus.net Fri Sep 30 01:00:06 2005 From: ichoi at telus.net (Ivan(In) Choi) Date: Thu, 29 Sep 2005 23:00:06 -0700 Subject: [Wbo2] everything checked out good but still doesn't work. Message-ID: <001301c5c584$35533e50$7ba9d8cf@amdgeni> I think My heater circuit working OK LED comes bright after 3-4 minute also it goes out very short time like 1/10 sec when my fan starts.expect it steady on.. but i can't set free air reading(4V) because I have L2H2 sensor I installed 20K pot and some resistor instead of cal resistor.. but I can only adjust from 3.5V to 3.6V even I add more resitor(40Kohm) still I get 3.61V. my cal resitor on the sensor is 1kohm. I follwed check list and everything was good. I don't know what to do now.. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.diy-efi.org/pipermail/wbo2/attachments/20050929/c9418352/attachment.html From bcroe at juno.com Fri Sep 30 23:50:36 2005 From: bcroe at juno.com (bcroe at juno.com) Date: Fri, 30 Sep 2005 23:50:36 -0500 Subject: [Wbo2] everything checked out good but still doesn't work. Message-ID: <20050930.235037.444.0.bcroe@juno.com> Try leaving the resistor open circuit and see what reading you get. Bruce Roe On Thu, 29 Sep 2005 23:00:06 -0700 "Ivan\(In\) Choi" writes: > I think My heater circuit working OK > LED comes bright after 3-4 minute also it goes out very short time > like 1/10 sec when my fan starts.expect it steady on.. > > but i can't set free air reading(4V) > because I have L2H2 sensor I installed 20K pot and some resistor > instead of cal resistor.. > but I can only adjust from 3.5V to 3.6V even I add more > resitor(40Kohm) still I get 3.61V. > my cal resitor on the sensor is 1kohm. > I follwed check list and everything was good. > I don't know what to do now..