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Old 07-19-2003, 07:02 PM   #14
Scooby Guru
Member#: 7089
Join Date: May 2001
Chapter/Region: NWIC
Location: Western Wa
2016 STi


Originally posted by Jon [in CT]
As I recall, the orignial Lambdaboy display consisted of about a dozen LED lights arranged in a row on top of the meter's metal case. You must have a newer version.
My version has a nice big 3 digit LED display.

My big problem with the lambdaboy is the analog output signal's accuracy. The wideband unit itself gives a 1.8-2.8volt rich to lean signal, which is extremely accurate compared to the digital readout on the meter. You use an inverter/amp card (basically just a voltage divider) to change the signal to a 0-1volt lean to rich. I've tried several different inverter amp cards from Lambdaboy, with several different styles of power supply, and several different calibration curves... none come close. The closest I can come is to make my own cal curve using butane testing of the o2 sensor and a DMM connected to the analog output, but even that's lacking as it's difficult to get the meter stabilzed on any singal AFR value.

I'd love to buy one of these from Klaus as long as he can gaurantee the accuracy of the analog output.
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