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ways to put w124 speedometer work whith 6 speed gearbox
PedroFerreira Offline
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#1
ways to put w124 speedometer work whith 6 speed gearbox
hello,can some one tell me what´s the way to put speedometer working whith 6speed from w203?
11-09-2016, 01:39 PM
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firen456 Offline
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#2
RE: ways to put w124 speedometer work whith 6 speed gearbox
Hello,

use the speed sensor from the diff with a speedohealer V4. I got issues with the signal of the sensor and solved it by converting the sensor signal to a square signal with a lm1815. It works great now. With the speedohealer you can adjust vour tach signal from -99.9% to 9999,9%.
11-10-2016, 08:53 AM
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hansdampf Offline
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#3
RE: ways to put w124 speedometer work whith 6 speed gearbox
Hi firen,

could you give more information of how to connect the lm 1815. I have a speedo healer v4 in connection with a german device the converts a wave signal into a square signal. Deppending strongly on the the temperature (the colder, the better it works …) the speedo (w126) falls back to zero at max 170 km/h …

I think the signal converter I have does not wotk right. 

Should be 4 wires. +, ground signal-in and signal out … right?

Please help me out,

how do I connect the lm1815?



cheers from munich

hansdampf
01-10-2017, 12:59 PM
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Tobulus Offline
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#4
RE: ways to put w124 speedometer work whith 6 speed gearbox
I know that problem. The speedometer is built to work with an inductive sensor, square signal input doesnt work above a certain frequency.
01-11-2017, 09:07 AM
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firen456 Offline
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#5
RE: ways to put w124 speedometer work whith 6 speed gearbox
Hi,

in the LM1815's datasheet there is a circuit explained which works well. 
There's a german whatsapp group i want you to join Smile   Just PM me...

Max
01-13-2017, 02:49 PM
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Gelubelea Offline
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#6
RE: ways to put w124 speedometer work whith 6 speed gearbox
Better conditioning the signal with NCV1124 or MAX9924

Gelu
01-15-2017, 08:24 PM
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