DIYEFI.org Forum

I disagreed on the issue of measure rate importance in that thread, the measure rates expected to achieve with the faster chip require unsheathed element with wires thinner than human hair. It may be useful in lab conditions for very quick measurement stabs, but in daily use it'd burn up before leav...

Back on the topic about FBW throttles, here are few ideas about safeguards against various mechanical, electonic and electric malfunctions: As the Autospeed article mentioned, the devices use dual potentiometers. There are also accelerator pedals with opposing potentiometers. The beauty of it the su...

That LT1086 was for reference only :) LT3694 is an expensive bugger, but on the other hand it contains two linear/LDO regulators, so if for example there is a need for regulated +12v rail (EGT circuitry etc) it's available with minimum component additions. If it's felt the linears should be discrete...

Just a quick remark from my build thread; be sure to include fiducials in Spin2! It's an absolute must if you ever want to use a pick-and-place machine to assemble the board

Okay, this should be the definitive PCB layout: http://koti.mbnet.fi/~vendigo/stuff/Cinch-final.jpg The yellow casing outline are on Eco2 layer, which I understood isn't used for much so it shouldn't create problems turning on or off the check the layout. Component maximum heights are indicated acco...

The ripple is well below 1mV, and with voltage input filtering it gets even better. Here's the overview: http://koti.mbnet.fi/~vendigo/stuff/Vin-filtered.jpg Purple is the simulated noisy charge voltage from the alternator. Dark blue is after filtering; the values are WAY off, but this is the first ...

I made a reference circuit with the current power supply schematics as a reference with a separate LDO regulator (LT1086-5 as, suprisingly, a Spice supplied by Linear doesn't include IC's from other manufacturers), LDO built with the driver built in the LT3694 with the same configuration, and the fi...

I took a quick look at the WRML, I think the traces do have a purpose; at any case, they're relatively easy to remove in 3D application. What I did notice though the switching regulator seems to be quite out in the open; in the designs I've seen the circuit has some sort of ground shielding around i...

Updated! I removed the FET locations and spring plate pads from the actual board and made spring components instead! If there's now a design without high-powered TO-220's, there won't be useless bits of foil to bother routing. Plates are now located by top layer document rectangles. I also put SMD p...

Here's the simulation with load applied: http://koti.mbnet.fi/~vendigo/stuff/1700mAload.jpg that's about 160µV from the lowest peak to the max. Should be still plenty good for most IC's though. There's obvious harmonic pattern of 100Hz , plus less obvious at 1500Hz. I wonder if a squiggly trace befo...