Pressure Sensor for Flow Bench

[Tony Bryant]

> Hey, anybody up for a DIY FlowBench? 

As, it happens, I'm also building a DIY FlowBench. May I enquire:

1) What are you using for (a) blower(s)? 

2) Can you publish your thyristor speed controller circuit, or at 
least give us some rough details? 

FYI:

I'm currently using a hotted up garden leafblower, but I'm only 
getting 10" @ 100 CFM. (Its also very loud).

I'm using the PWM circuit out of the back of the Motorola Thyristor 
book, but it's kinda pulsey in this application.

And a mechanical pressure sender (a modified carb 
secondary vaccum modulator, hooked to a pot) as the feedback to the 
motor controller.

I'm using an uncalibrated flap style MAF (I will calibrate on some 
known heads)

Cheers.