Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Hello. I didn't realize that there was a corner for foreign friends. I didn't pay enough attention so I made some pieces of mistake owing to the language. Sorry,I'll try to do thinghs in the orthodox way. Why I'm here it's a long story. That's a vw aircooled forum but let me say that I never saw so much electronics in a car forum. There are more than a real pro in this field. Electronics isn't my strong side. More much I want to learn it and less I can understand it... I'm quite tired but it isn't still too much for me,it's boreing but I must resist. I was going to build an ignition controller...studies in electronics are never ending... Now I'm looking for infos on megasquirt, I must confess that it isn't a joke. Today I realized that a tachometer is more much than it appears. I think to use this topic to ask questions sometimes. Did you know the mini MS?
30.8KB
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
The next time I'll try to post someting for a homemade project. Some comparisons too... See you.
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Hello. However the miniMS was made before the microsquirt.
It was used on a H.D. motorbike,the topic here: That's the site for a minMS: Don't let's think of megasquirt now. I'd like to explain how it can appear for somebody that have no skills in electronics. I was going to begin with an ignition controller,it will be hard,if I could do it problably I would have done something different derivated from MS. That work isn't for beginners at all. Look at this little guide.
51.9KB
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
A video showing how to make a PCB by P'n'P at home.
Bye.
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Hello. That's what I'd like to build:
There are some reasons,because the PCB is single layer
parts on the top and soldering on the bottom. Another reason is that there are many pictures of the controller built. Schematics and other thinghs have no meaning for me. There are PCB that have got 2 or more layers, at home you can't make a PCB with more than 2 layers,it's already quite difficult. I don't like mj and I hate ms but if you're looking for for a good ignition that offers more than other ignition kits to upgrade your old distributor mj is the answer,it cost less and it is distributorless,the same for the ms if you need a standalone engine managment. Now you can only buy a ready mj,mo building kit avaiable anymore. It would be more dificult to build too owing to SMD parts and not single layer PCB.
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
That's an exemple of SMD
If you look at a video,it seems easy but it isn't so.
Modificat de Herby (acum 13 ani)
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
After that we'll see only things regardind the building of a single layer. Bye.
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Hello. Now something about soldering Sometimes you find different pieces of advice, of course lead free is right foe beginners. I read that a bad soldering iron can break parts because elecrtic problems not heater. Here they said to apply solder to the tip,somewhere I read never do it. At the least everywhere they say to make solder joints cone shaped.
Modificat de Herby (acum 13 ani)
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Well,let's see what i'd like to build... Everything you need to try to do it. wiring diagram too: The B.O.M.(bill of materials):
Qty Value Device Parts 7 .1uf C-US050-030X075 C3, C4, C5, C6, C8, C9, C10 1 .1uf CAP-7,5 C7 8 1K R-US_0207/10 R2, R4, R5, R6, R8, R9, R10, R11 9 1N4004 1N4004 D2, D3, D4, D6, D7, D8, D9, D10, D11 7 2N2222A 2N2222A Q1, Q2, Q3, Q5, Q6, Q7, Q8 1 2N3906 2N3906 Q4 1 5.1V 1W ZENER-DIODEDO35Z10 D1 1 12v 1W ZENER-DIODEDO35Z10 D5 1 16 MHz XO-8 QG1 2 33uf CPOL-USE5-8.5 C1, C2 1 68HC908KX8 68HC908KX8 U1 1 100 R-US_0207/10 R1 1 270 ohm R-US_0207/10 R7 1 680 R-US_0207/10 R3 1 DB9 Female F09HP X1 1 J5MM J5MM J1 1 LM2937ET-50 78XXS U3 1 MAX232 MAX232 U2 1 MOLEX_MINIFIT-14 MOLEX_MINIFIT-14 X2 1 MPX4250 MPX4250 PS1 1 zero ohm R-US_0207/10 R12 Don't care the microcontroller 68H...,it isn't avaiable anymore,don't care the pressure sensor MPX4250 at the moment,mind that you could need diffrent parts from the list,I'll try to check it. That is like it appears: That is to understand the size approximately,I'm not sure that is the same version: For who doesn't know parts at the least like me: Once upon a time there was avaiable something like this to start the project: Then I'll post some pictures to spot different parts. See you.
Modificat de Herby (acum 13 ani)
pus acum 13 ani
bogdan_bus
Broscar pasionat Din: brasov
Inregistrat: acum 16 ani
Postari: 2834
- i don't find 68hc908kx8 here but i use qy4 for passing this inconvenience ..qy4 is avaiable and is verry cheap, but ... it have another pins assignation - for r12 zero ohm i use a small value 1ohm resistance 1/4w - 2n2222 transistors - use metalic cap tipe - it is better for automotive purpose
Modificat de bogdan_bus (acum 13 ani)
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
Hello. Thank you very much,Bogdan. You answered before I asked. Good piecees of advices! I didn't know. In the previous picture they are black with no metalic silver cap. The microcontroller is the last thing I'll mind,of coures different pinout isn't a surprise. I have some doubts about others parts. I saw different C1 and C2, Q too as you remarked,C3-C10 orange or green... I'm afraid about max232,I read that not all 232 are the same and so maybe something around it can change,I can't find the topic anymore. Why did you change R12? Owing to a different microcontroller? I realized that you used different R1,R3 and C7. Now some pictures to see different parts: This is very good and important for building, you see where to fit parts and how because some parts have a polarity to respect and I don't knot theese things,I'll do the same as in the picture. Bogdan's version: There's an alternative connector for the 14 pin molex but I can remember,something from computer parts...that isn't so important. I think that I can look for parts now... See you.
pus acum 13 ani
bogdan_bus
Broscar pasionat Din: brasov
Inregistrat: acum 16 ani
Postari: 2834
yes, not all 232 are the same yes .. i use for r1,r3 and c7 other values for r12 .. yes i don't use molex conector, because i don't find here .. only with 8 pins/4 in the row
Modificat de bogdan_bus (acum 13 ani)
pus acum 13 ani
Herby
Broscar nou Inregistrat: acum 13 ani
Postari: 38
I found a qY4 but it is always a 68h... It looks different from yours. I don't care it at the moment. I learned just another little thing,there are withe plastic pcbs that are solderless,I din't know. I found some very cheap electronics kits: You can see more products using the polish version: I'm thinking of theese pcb for protos... A comparison beetwen 2 max232: What's the right one? I saw prices over 6 euro too. See you.
pus acum 13 ani
Herbis
Broscar nou
Inregistrat: acum 11 ani
Postari: 2
Hello. It's me... I lost the password and so I registered again... I thought of it after a long time... Too stupid! How are you, friends? What's the news? I had to sell my t3... I think that the idea of building a megajolt come from here: http://www.locostbuilders.co.uk/viewthr ... amp;page=1 I don't remember, of course I didn't understand very well. Now I know that a pcb can be made at home, a megajolt is a distributoless ignition, a megasquirt is a programmable ecu and so on... That's a megaprogrammer with te adapter for the old 68HC908KX8. http://www.locostbuilders.co.uk/gallery ... gbuilt.jpg It was made for megasquirt processor. That in the picture was by Patrick Carlier. You can find the project here: http://www.not2fast.com/megasquirt/megaprog/ I must re-study it a little bit. Bye.
