Trouble finding a part

Here is the deal.. A dude is paying me to build a circuit he has the schematic on and I have collected all the parts but one.. Maby one of ya can point me in the right direction

Specs I know:

Its a 1:1 transformer.... 1 primary,2 secondaries,600 ohm impedance..

some of the rest logical deductions based.. this circuit has a 7809 voltage regulator and the max current for that is 1A.. also has a 555 before the transformer as well... In reality.. The circuit might produce 600mA max.. 9 to 10 volts..

Any help would be great

What are you building? with what you gave us at a writeup and a 600 ohm transformer it sounds like it may be a DI box or other audio device. If we had a clue to what you were building, or saw the schematic, it would be easier to make suggestions. Transformers have more specs than just ohms. they may have impediance, voltage, amps etc and theres nothing in your writeup to specify what size transformer you're needing.

For low to hige impediance conversion, 600 ohm transformers are used. Jenson makes the best.

http://www.jensen-transformers.com/ln_in.html

http://www.jensen-transformers.com/datashts/11ssp6m.pdf

http://www.jensen-transformers.com/

Gave you what I know... I know they have more specs.. Im just going by a schematic.. All i know is 2 secondaries.. had 600 above the transformer.. I deduced after doing my searching that this means 600 ohm impedance

The closest match was a audio transformer @ digikey

Digi-Key Part No.237-1123-ND.. Matched pretty close from what I need...power dissipation was 4 watts and that was close to what I had estimated.. As long as it doesn't generated more that 444 mA.. all will be good

http://alt-nrg.org/efie.html

This is the circuit.. Try not be to critical now.... actually a paying gig.. gave me some cash out of the blue today

Some of the circuit I know whats going on.. others.. well.. ill figure it out along the way.. He just bought me most the parts today.. Everything but the caps,bridge rectifier,8 pin socket,terminal block.. Forgot to add them on my parts list last night, and when we when to pick the parts up.. well..

??? You're building something and dont know what it is, yet you have a schematic ??? Maybe you can hold the schematic closer to the phone so we can see it?

Seriously Transformers/op amp combos work in litterally hundres of thousands of devices. Maybe you can narrow it down a bit by ruling a few out. This is a DIY site but we can only give help based on what you post. A 555 chip from what I remember is a timer. It can be used in everything from a computer, calculator, clock, synth echo devices, or even a bomb. We like to guess but we cant read minds here. If you're building a bomb you got the wrong site for advice.

And what part of don't be critical did you not grasp..

I have a degree dude.actually.. 2.. i know.. big deal.. it isn't to me. and yea.. one is in electronics and just to through it out there.. other one is programming.. doesn't mean I can look at a circuit and know exactly whats going on

A)I KNOW what the schematic does, BUT I would of liked to have a bit more information on the working of the diagram.. not going to happen as there isnt any.. just very vague details is all.. transformer is an example.. 600 WHAT.. Damn he would of failed my physics class without using units.. Is it a to much to ask for some proper documentation.. Hell.. The circuit I wanted to use had ALOT of documentation and explained what everything did in detail.. double the components BUT far easier IMO based on the LM3914 chip.. would be a breeze to troubleshoot.. this on the other hand.. is going to be a nightmare IMO

B) I don't know what everything does in the schematic exactly but I can deduce much of what is going on..and I know what the outcome is going to be.... going to set it up on a protoboard 1st and see what happens

I used a 555 before to make a freq counter ...the chip is a timer and has 3 states.. Astable,mono and bi.... yada.. yada.yada. I know..still dont fully understand them, but i have used them.. smart enough to dl the spec sheet though as I do FOR all IC chips I use

I wanna say the 555 works in bistable mode(i.e Flip flop) SINCE the 7 pin is a n.c. but i could be wrong.. what the documentation said anyway

I respect you vast wealth of knowledge on electronics WRGKMC , but cut me some slack and a bit of credit here...My electronic skills arn't as good as some of ya's but at times they are very good

BTW...the circuit is an EFIE.. or Electronic Fuel Injection Enhancers... The dude is adamant about having me build it...still have to do some reading as this is all very new to me.. Never heard of such a device until i met this guy last Wednesday.. Well.. I told him.. No guarantees.. Ill do my best.. etc..

OK.. Im an idiot.. Never say the parts list link on the TOP.. GOD DAMNITT.. Ive been looking through a 2500 page digi-key catalog ... :Facepalm.. I never saw that link before now

Can't say for sure, is this Radio Shack part what you are looking for?

http://www.radioshack.com/product/index.jsp?productId=2103994

Bear in mind that if it is, there are better parts than Radio Shack, but it would give you a starting point.

Edit: Sorry, I see that WR has given you a better lead.

Actually... I took the head of my ass and looked up.. Saw the damn link to PARTS LIST with all the parts hyperlinked to mauser,digi-key and the one i went with.. Jameco...digi-key had the damn bridge rectifiers on back order till 4/11/11.. i was LIKE WTF.. so I went with a place that I could get all in one place.. I got most..Still need to pick up two 50K pcb mountable trim pots.. then then parts are done.. OHH {censored}.. just remembered I needed to get a terminal block... Ill improvise i guess

edit: Just checked the transformer specs from the one I ordered.. pretty damn close to the one I deduced that I needed.. Prefer to go with what this dude used... for obvious reasons

http://download.siliconexpert.com/pdfs/2010/3/10/5/28/15/401/tms_/manual/ty-300p.pdf

Very close as I had seen that one two but alas.. all the specs are ok accept one... only one secondary.. needed to have two

Electronic Fuel Injection Enhancers - Thats what I was trying to find out. Sorry for being condecending, I just had no idea as to the context of what you were building. What you're working on is pretty specialized stuff. Since you have a diagram I'm guessing they have been built before and its not a new design. Engineers who work for major manufacturers often design things and have parts manufactured for them. Sometimes theres only one company who makes the specialized parts for a specialized application. Its like protecting a patent by having oddball parts noone else can find. Actually the best way to protect something besides sealing it in black epoxy. I'd Try Mouser Electronics. If they dont have what you need its likely noone does.

Sorry I cant be of more help. My electronics expertese is in areas like Audio, Communications, Business equipment, IT, digital photography and digital audio etc. Theres much commonality between many but The last job I had in the auto business was back in 1974 where I did engine and Transmission work for a summer. It was before most high tech electronics existed and it was a job I hated with a passion. All the electronics in cars are connected to a computer now. They really arent much different than alot of stuff I've worked on with sencing, controll and fault detection.

Like in my industry the manufacturers black box everything now. I used to repair that stuff to component level and now its all board swapping. They dont even tell you what things do in manuals to component level and try to keep the tecs as dumb as possible now to keep their pay scale low. They may have one repair center in the world that attempts repair on the computer moduals. Boards are multi layered so you cant solder them and need a microscope if you do. If they cant fix it in an hour it gets recycled for raw materials. All sensor moduals get replaced with new when they fail.

I havent heard of anyone actually building a control moduals before. I would think it would be quite dangerous to have something controlling a fuel system, subjected to heat and vibration with questionable parts quality and build, but I suppose you have your reasons. Anyway, good luck.

Np

thx.. Yea. this has been built before but not by me.. I have no o-scope to measure the output freq of the 555, to confirm it is what it needs to be... but the dude said he would get me anything i needed.. jameco had most of the parts i needed except the 50k trim pots.. {censored}ing had them on backorder.. this dude wants this built ASAP

Here is the schematic I redrew that is identical to the one off the website.. Doing this enables me to link it the FreePCB program and if everything in named the same on both program.. it highlights all the connection for whatever pin you want.. resistors,caps,chips,etc

and here is the possible layout design

Stayed up too late doing this last night.. but here is a possible layout

Not done yet as I am not happy with the way the bridge rectifiers are done..and this really just gives me an idea on the layout.. This the 1st time i used the FreePCB program but not the 1st time i used the FreeSch.. Hell.. Im a {censored}ing expert with it.. BUT never had I used the layout program with freesch.. This is only my second time I laid out anything on a pcb board and NEVER with this many parts.. 1st time was with a simple power supply with 2 cap,2 resistor,i pot,317m voltage reg and and a 10:1 transformer.. was easy.. This on the other hand:facepalm:

Ill just make the traces with solid core wire.. I know tedious and you have to be careful.. Hard to do it that way with this many components but i believe its possible.. Either that way, or try my hand at making a circuit board myself. I really hate chemicals though and the etchant is pretty {censored}ing dangerous.. not worth it to me

Any suggestions on the layout.. maby you could give me some tips.. I really dont know what im doing with layouting stuff

BTW.. I graduated with an A.A.S. from a state tech school last friday... I started to post a thread here but ..not a big deal.. well it is and it isnt.. hard to explain how I feel about this degree.. Also my B-day was monday.. LOL.. I think I just hate making a thread:rolleyes:

EDIT.. Do you like my transformer (i.e. T1) drawing.. had to make them. I so lucky I downloaded the datasheet on this transformer.. Made setting up the pins correctly, a breeze.. Had the PCB T1 pins right.. just like an IC chip, BUT the schematic was a bit weird.. 1 and 6 was the primary.. 3 and 4.. the 1st secondary,2,5 the second secondary.. Once I had that setup.. everything fell into place

If your multimeter has a frequency counter you can at least read the puld rate. You wont be able to see if the pulses are square. The circuit is just a converter. it takes a pulsed signal in, amplifies and buffers it, then uses the clock chip to trigger a signal to the transformer where it has two 1:1 outputs to create two rectified signals of opposite polarity. Whatever pulsed signal comes in is going to have two mirror images coming out. Trim pots balance the levels. So long as the cap values are good, you shouldnt have much signal distortion. I'm sure you can get the trim pots and transformer at Mouser Electronics. You just have to dig because they probibly got a thousand different ones for all applications. The tech support number is supposed to be real good so if you cant find what you need on line just call them. The voltages feeding the xformer are low so its current doesnt need to be very high rating nor a large physical size.

Thanks for the explanation on the circuit.. I knew how everything worked except the 555.. Was unsure on its function with in the circuit

My guess work on the transformer was somewhat accurate.. I estimated a max wattage of was 4.5 to 5.4 watts based on the max voltage of 9 via the 7809 and something i read on the website.. the current was going to be 5 to 600 mA max.. After doing a bit of research and searching the whole Digi-Key catalog.. YES.. very mind numbing.. I correctly deduced that this was an audio transformer and the 600 meant impedance... and that the max wattage was actually 4w. The one I picked out before I found the parts list would of probably worked, but its best to go with what the guy that designed it went with.. atleast in the beginning

Edit.. almost forgot...I have two dmm's but my main one is a wavetek 27Xt.. and is capable of reading a counting a freq up to 20k.. the 555 generates a 3k pulse so im good.. as long as I dont need a spacial probe for the DMM.. I have a cheaper ambose that I use for school... this one is cost more so I kept it at home.. Also does a hellava lot more

This dude that has asked me to do this is the first person ive done any work for that believed in paying me for my time/effort..thought he was full of {censored} at first.. until he gave me a $100 bill yesterday and have yet to solder anything.. he buys all the parts too.. As far as i'm concerned.. he can be full of {censored}.. as long as I get paid.. I dont give a {censored}

When I do PC work for family.. labor is always free even though I do take money,trades or gifts if they are given... Im pissed about 1 job I did for someone though.. Reformatted his PC twice and installed Windows 7 to replace vista( well the 1st time anyway).. I know.. TWICE.. had it perfect both times and he {censored}ed it up each time.. I make sure that he SAW it working when he came to pick it up both times.. I have learned from experience to do this... a bit of CYA.. Anyways the local shop wanted to charge him like $95 and I went WTF.. PC shops have lost their mutha {censored}in mind..Only takes 2 hour tops to reformat, install,update and a bit longer if you need to sift the net for drivers.. That CAN take awhile though.. depends on what your looking for...In anycase.. We agreed on a price of $25 each time and I have yet to see any money.. HELL.. My mom told me he had {censored}ed it up AGAIN and is getting someone else to do it... NOPE.. cant do Business with him no more.. Tried to help a dude out and I get {censored}ed.. avoiding me and making empty promises when I run into him Thought he was better than that.. .. If i was doing this job for someone I didnt know.. $60 feels right.. Just my thoughts.. I believe in setting a realistic price tags for jobs and I hate bidding on anything..Im actually good at it i guess.. but I just feel uncomfortable...feel like a used car salesman.. Probably why ill never have much money doing side jobs.. Well.. main jobs until i find an actual full time job

Is it to much to ask to has some money in this life... Since I dont have looks, i must rely on my stunning personality or money to attracts the women.. daughter says every woman I try to talk to is a Hoe.. type im attracted too.. hehhehehehe

I doubt if the wattage is even that high. Its just a dual trigger circuit. The transformer is converting the clock pulse, so it cant be much current there. Maybe enough to light an LED or more likely, provide a high low trigger for another chip on another circuit board. Then if theres any real hard work involving higher current to be done it uses other higher current devices. My guess is, if its a fuel injection system, the dual output from the transformer may make the injection occur 180 degrees out of sync for two sides of an engine timed with a pulse from the engine coming in to this circuit.

as i said.. all guess work until i found the parts list.. I believe this device hooks up to the O2 sensors before and after the cat...Kinda like an offset to the voltage the sensors are reading..dont know alot about it YET.. I guess i have some chtristmas reading to do.. hehhehe.. I just building the damn circuit.. Ill test it the best I can,give it to him and he will see if it works.. If it works on the first attempt.. Lets just say, ill be very happy

Well.. the circuit I wanted to use was based on a led driver/comparator chip, a LM3914.. but It wasn't a dual output though and this is more automated it seems.. The other one you had to set the output offset and that determined how rich/lean the fuel mix was.... Not really sure on this