MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: schrocketeer on September 17, 2025, 10:14:16 AM

Title: Air Flow Meter +5Volt source from 3 AA's?
Post by: schrocketeer on September 17, 2025, 10:14:16 AM

For testing an Air Flow Meter from an '85 or '86, will 3 AA batteries connected in series (4.5-4.8 VDC) be adequate for the 5 Volt reference source for the flap position sensor (understand series of rectangles)?
Understand I can use a hair dryer at a distance to stimulate the thermistor for air temperature.

Title: Re: Air Flow Meter +5Volt source from 3 AA's?
Post by: schrocketeer on September 17, 2025, 12:37:47 PM

For other's reference, here's a great dissection of the Air Flow Meter: https://www.k100-forum.com/t11055-bosch-air-flow-meter-restoration-summary

Title: Re: Air Flow Meter +5Volt source from 3 AA's?
Post by: Los_gatos on September 24, 2025, 10:25:53 PM

You could probably use a 12v to 5v buck converter. That might be easier and they're pretty cheap.