DIYEFI.org Forum

Cool. This is the diyefi retail outlet so to speak? Congrats on your first product.

Peter wrote:

Fred wrote:Before machining it had pointy triangle teeth. DIYAutoTune sell them that way.

It's possible that particular sensor cannot operate well with that tooth profile/proximity.

Last night I chatted with DeuceEFI about this issue. On the Max9926 part, the 1nF cap across the inputs pins can be removed. The 9926 will operate just fine. The other possibility is to feed the Hall Effect signal into the negative input pins (IN1- and IN2-), and let IN1+ and IN2+ float. Also no cap...

A search at Freescale.com for XGATE returns plenty of app notes you may find useful. Here's some Assembly info: XGATEASMRM : Motorola XGATE Assembler http://cache.freescale.com/files/soft_dev_tools/doc/ref_manual/XGATEASMRM.pdf?fsrch=1&sr=5 XGATECOMPRM : Freescale XGATE Compiler http://cache.fre...

I remember once upon a time 'stirring shit' as you call it regarding transient fueling. And here you are 2 years later incorporating it into the code. There are more examples. Overall though, good thing you eventually deal with whatever gets stirred up. I'm thinking the learning process could go a l...

I didn't think we were talking about DACs. Fred paints himself into a corner and then reacts. Nothing new here. Many of us more capable resources hope he grows out of it. It's a big hindrance to contribution. Honest and truly.

The first DAC I clicked on could drive 20mA which is fairly typical. Output pins from processors also typically only drive 20mA, and must be connected to a driver transistor to make a PWM signal that can drive something practical. In the same way, usual practice puts a current buffer transistor aft...

The current to operate the solenoid isn't any higher, PWM vs DAC. Operating the transistor in the ohmic (aka linear) range when using DAC control, that's the issue. For ohmic range operation a larger and more expensive driver is needed to provide enough silicon junction surface area to dissipate the...

From https://en.wikipedia.org/wiki/Digital-to-analog_converter Under DAC types "The pulse-width modulator, the simplest DAC type. A stable current or voltage is switched into a low-pass analog filter with a duration determined by the digital input code. This technique is often used for electri...

which if it were up to me and i had the time to spending doing it. i would dispose of said iac and use a vaccum bypass much how the 2003 zx-6rr is setup. All valve-based idle air control systems are 'bypass' devices. The idle air bypasses the throttle butterfly, or throttle slide. There are other w...