Re: [MBZ] super simple circuit for a Tachometer
Gotta figure out how the gauge works, send it something it can use. --R Allan Streib wrote: Now how to modify it to put out a signal to drive the stock VDO dash gauge? Then we have a replacement for flaky tach amplifiers. Allan On Nov 20, 2007, at 9:59 PM, Rich Thomas wrote: With all the talk in the past about tachs for diesels this might be of interest to someone. --R http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] super simple circuit for a Tachometer
Gotta figure out how the gauge works, send it something it can use. Now how to modify it to put out a signal to drive the stock VDO dash gauge? Then we have a replacement for flaky tach amplifiers. You'll spend a lot less time just fixing the stock circuit than you would replacing it. The stock's problems are almost always with the connectors in the can. If the magnetic pickup has a problem, just fix/replace it. It's the most reliable form of pickup there is. The gauge is standard, it just measures the frequency of the incoming pulse train. (Though it's calibrated for 1 pulse per rev on can-equipped cars. It's calibrated for 144/rev [?] on later ones that use a pickup on the ring gear and got rid of the can.) -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] super simple circuit for a Tachometer
The 'simplicity' of the circuit can be a bit deceiving. The optical pick up is straight forward enough. However it does use a small-embedded 8-bit microprocessor and a binary image (HEX) file to program it. Analog tachometers are easy enough to make from 555 timer IC-S. The print gauges at www.sherline.com are cool however .. George Larribeau Dallas Texas - Original Message - From: Jim Cathey [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Wednesday, November 21, 2007 12:31 AM Subject: Re: [MBZ] super simple circuit for a Tachometer With all the talk in the past about tachs for diesels this might be of interest to someone. http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. The circuit that's actually in the can isn't much more complex than that, and can be used to drive standard gasser-type tachometers. (One that can be recalibrated for the number of pulses per rev.) -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] super simple circuit for a Tachometer
With all the talk in the past about tachs for diesels this might be of interest to someone. --R http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] super simple circuit for a Tachometer
Now how to modify it to put out a signal to drive the stock VDO dash gauge? Then we have a replacement for flaky tach amplifiers. Allan On Nov 20, 2007, at 9:59 PM, Rich Thomas wrote: With all the talk in the past about tachs for diesels this might be of interest to someone. --R http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] super simple circuit for a Tachometer
That is way cool. I always wanted a tach for my 200D. Back in 1971, I bought a tach for my R-50/2 and I always thought that VDO tach could be made to drive off OM 621/61x engines by using the base of a gasser distributor stuck in the oil pump drive in place of the top plug. Then In the 80s I looked at the electric pickup Diesel tachs, but they were pricey. This looks like something even i could build, on a breadboard, at least. I could probably find someone around this town who could build (etch) a circuitboard for me. aesthetically, I think the 2 round black/white VDO would look more appropriate in the 200D than a digital tach though. At 08:59 PM 11/20/2007, you wrote: With all the talk in the past about tachs for diesels this might be of interest to someone. --R http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com Loren Faeth ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] super simple circuit for a Tachometer
With all the talk in the past about tachs for diesels this might be of interest to someone. http://www.davehylands.com/Electronics/Tachometer/ Here's a super simple circuit for a Tachometer. The circuit that's actually in the can isn't much more complex than that, and can be used to drive standard gasser-type tachometers. (One that can be recalibrated for the number of pulses per rev.) -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
