EFIE schematics
 

I'm wanting to build one of these over the 3 day weekend but I cant' find any schematics. Anybody got one?

Also, if you have them, I'm looking for schematics for an Air Fuel Ratio Meter and a Pulse Width Modulator.

Thanks!

I know I've found all of these here before but I'm having trouble digging them up again. I usually save this stuff when I find it but I can't find any saved copies either.

I did find this AFR meter on google:
https://www.scirocco.org/tech/misc/afgauge/af.html

I found this DIY PWM on google:
https://www.rmcybernetics.com/project...generator2.htm

Here's some EFIE digging...
https://better-mileage.com/memberadx.html
https://www.youtube.com/watch?v=PEHJ9te7gvk
https://www.esnips.com/doc/718eacd2-0...nhancer-Manual (or download at https://www.esnips.com/nsdoc/718eacd2...action=forceDL )

I wish I could find the ones that have been posted here before...I remember some pretty decent ones a couple months ago.

That is too awesome, the parts for the AFR meter can be had for free!

I don't know your background but be careful with the PWM. make sure it can handle the current you plan to put through it.

I plan on making the PWM drive a FET to run the load. :thumbup:

Almost free for the AFM. I ordered 3 of the LED driver chips for $13.

I'll have to look and see if I have any information on a PWM or not. I know I don't have anything on the A/F meter.

Check this out maybe you'll find something you like here.

https://www.discovercircuits.com/P/pwm.htm

dude, I work with fets all day every day. that doesn't mean anything. a fet or field effect transistor doesn't specify current carrying capacity. the ones I work with will only handle about 13 miliamps per cell. obviously there are several cells paralleled.

engineering gets it done

remember, heat sinks and silly grease (conductive silicon grease) and you can parallel them if you need to. you could also go so far as using a cooling fan but now you are reaching the realm of just buying one that is pre-made.

I started ordering parts for the EFIE. I got the 5.0v Voltage Regulators in today.
https://www.fuelly.com/attachments/fo...091f59ba3b.gif

I can't believe how tiny they are! Part number is LM38690DT-5.0 and they're free from nsc.com. What threw me off is they shipped to me Next Day Air. Totally wasn't expecting that.

BEEF, I don't plan on running toooo much off this PWM, I got it working this weekend. The transistor I went with only handles 5.0 amps constant(8.0 peak) so if I do in fact build an HHO cell to try in the car I'll need to build a daughter board that the PWM drives.

I've just had bad experiences with telling someone how to do stuff and they buy the cheap stuff and get mad at me when it burns up.

as long as you understand what it will and won't do. also talking about small parts. I work with resistors that are 0402 (40 mils by 20 mils) and have worked with 01005 resistors (10 mils by 5 mils) those are really fun to solder. also, depending on how much of this you plan to do. you may want to get a hot air gun. atten is a hakko knock off and you can usually get them from ebay for about $150. if you only do it a little then just use a hotplate.

good luck man.

If we're going to talk about that crazy surface mount reflow soldering stuff with those tiny components, I might as well provide these links...
https://www.hackaday.com/2008/02/16/t...ow-controller/
https://www.hackaday.com/2008/01/08/g...unt-soldering/
https://www.hackaday.com/2006/11/03/s...reflow-how-to/
https://www.hackaday.com/2008/08/05/h...ring-station/2

Be sure to look at the comments, often user comments there have great info.

these are the ones we have at work. we have gotten the attens because of the price. the hakkos run about 850-900 new where as the attens run around 150

https://cgi.ebay.com/HAKKO-850-SMD-So...ayphotohosting

I would post on here the inside of the parts that we design but I might get fired. most of our parts (not packages) are less than a milimeter long and are less than half a milimeter wide and the thickness is measured in microns.

found a project that was dead so I feel pretty good about sharing it. no details though. it is 2mm square.

Check this out.

I would start reading around page 44.

The EFIE schematics you need and the parts list is included

https://www.free-energy-info.co.uk/Chapter10.pdf

BEEF that's awesome. I wish I was in a different line of work.

well you take the good with the bad. I work with state of the art equipment. $60k network analyzers that go up to 20 gigahertz but there is quite a bit of stress in my job, deadlines and of course projects that work great but nobody wants them. that is what the picture is. high band 4.9-5.85GHz PA that will do about 16 dBm out and pulls aroun 160mA at power. works great. sorry for the technical mumbo jumbo.

an engineering degree is only 4 years and you can be a tech for 2. a great field to get into.

Yeah, I went with CompSci cause I'm lazy. I used to love since and math but for some reason I couldn't stay awake in Differential Equations and didn't like all the slow documenting and experimental methods, I just wanted to flesh out a theory, prove it and use it.

I am actually a tech up there but have been approached several times about going back for my engineering degree. I work with an engineer and actually design the boards that these parts are evaluated with. If I had less going on in my life, I would jump on the opportunity to go back to school but you know how life goes.

I started my career at ericsson working on their base station modules. the units that go in the towers. I then got into industrial electronics. good old 480 three phase. I am finally back into the communications side. I am actually working on the non-cellular side. I work with wireless lan and wimax. we are basically making amplifiers for laptops and other hand held devices. when I say amplifiers that may be misleading. most of our parts are around 3mm square and about a half mm tall. they are considered power amplifiers even though they only output around 16-18dBm which is a very low signal.

a few claims to fame. we have an amplifier in the gameboy DS, PSP, and NIKON has a camera that will send your pictures to an online storage bank if you get near a wifi hotspot. that is one that the guy I am working with worked on directly (the amplifier that is).

RFMD.com check them out. their are career opportunities and they have several sites. I work in Greensboro NC which is where their headquarters is and where the company started.

*edit* I meant to say this earlier. that part in the pic was taken with my camera phone. the reason their is a circle around it is because it was taken through a microscope and the part is 2mm square (8 pin package). I think the die is 1.2mm square if memory serves me correctly. also the part is open faced which means that the finished product would be black with the part number on the top so everything you see in the pic would be encapsulated and not visible. you would see the pads on the bottom footprint.

dkjones 96

Have you hooked up the EFIE yet? If you have what were the results?

Had to buy winter gear for the motorcycle so I wasn't able to do many projects. I should have something built soon though!