Posts posted by Dazza
Hi grandpa, Virus :)
The chances are I won't get it right the first time, or the second time, or the well I'm sure you can guess what comes next ;D.
Thanks for the info grandpa vary handy to know ;), there will be parts of my lathe that will need to be made on a lathe, so it sounds like the way to go to get it done on the cheap :D.
Virus, yes this can be very dangerous, this is where I started with the hydrogen project http://www.electronics-lab.com/forum/index.php?topic=1321.0
Hi audioguru :)
That microphone case is one of many that I made and tested ;), it's a lid from a deodorant aerosol tin, I used cloth stretched over the bottom that's held in place with a cabletie, I then used a type of rubberised foam to insulate the rest of it, which is held in place with electrical tape.
The cloth almost eliminates friction noises, but in using the cloth the seal is no longer very good, and allows for some outside noises to be heard, but the rubberised foam that encase the rest of it, helps reduce outside noises. So there is a bit of a trade-off.
I also tried using headphones that completely covered my ears, and Yes it did make a difference.
Hi, audioguru :D
I don't know about being back, it's more of the case that I've found some time away from taking care of my son Ethan, and my partner and daughter aren't hogging our shared dial-up Internet connection playing neopets ;D.
I think it was about 12 months ago when I made it, it didn't work as well as I had hoped, that is for what I wanted to use it for, but it does work very well for what it was intended to be used for ;), and with the modifications that you help me with audioguru, it works very well for tuneing into respiratory sounds or heartbeat sounds 8).
The green caps that you can see are not correct, I was just experimenting with different capacitors ;D.
Hi, Steven :D
I haven't done any hydrogen experiments for quite a while, I haven't been able to do much of any think since Ethan was born, just getting a full nights sleep is a rare thing these days :-\. He is almost seven months old, and he still wants his three hourly feeds through the night :o.
I'm still trying to find the time to finish a few other projects, that will support my hydrogen project, I'll get there eventually ;), I hope ;D.
Hi, shahrukh :)
Sorry for the late reply, the TV transmitter is still an unfinished project, I couldn't get the right RF transformer (T1) so I could not get the sound to come through :(.
I did manage to get it to transmit a very good quality colour picture over a short distance, however I was transmitting to a very old portable TV, and when transmitting to a more modern TV the image was not very good.
Happy birthday Ante 8), have a good one mate ;).
This topic has been moved to Circuit/General Requests.
Have a good one!!
Hi audioguru, Ante :)
That's Tasmania a state of Australia, and just above it is the world's largest island Australia ;).
The island in the pic which is just off the coast of where I live, is the world's largest sand island.
See if you can find me audioguru 8), I live on the northside of the river.
I'll stand in my backyard, waving my claw hammer around so you can see me ;D ;D.
I also have two of those cheap crappy radios, I pulled them apart to see if there was any think I could salvage from them. One looks as though, it was assembled by a blind man with one arm ;D
Well that's ok then ;D,
It's just that I saw the "au" in the link, you know you've got to watch those Aussies, if it's not nailed down ;D ;D ;D ;D
Thieves, how dare they :o.
Maybe we should steal one of there's, just to make it fair ;D ;D ;D ;D ;D ;D ;D
Thanks Ante :D, I love these old designs 8).
Alun, did you get the one that mixos posted on the previous page?
Hi Alun, Ante :)
Yes, the steppers are to drive the X,Y and Z axis ;), I'll be using a router for milling. One thing I have to keep in mind when trading speed for torque, is if the cutting tool is moving to slow, it can heat the material being milled, and cause damage to the cutting tool as well as what it is cutting.
Ante, among the variety of steppers I have, there are two identical steppers which I could parallel to drive the largest axis (12.0V 1.5A 1.8DEC) but then I also have one that has its own driver board attached to it(DC38V 1626.26rpm 3.0Kg-cm 3A) I think maybe once I get to the stage, when the mill is complete minus steppers, I can post some pic's of the mill and steppers, so use can maybe give me some advice on what steppers may work best for each axis, as well as the best gearing ratio to try.
Thanks again for your replies.
My very first electronic project used vero board, a keyboard splitter. For all my projects ever since except for one, I etched boards for. I don't know if anyone else makes their PCB's like I do, but this is how I go about it. I print the PCB pattern, then tape it to the copper side of the blank PCB then lightly centre punch where the holes are to be drilled, remove the PCB pattern and drill the holes, then draw the tracks with a permanent market using the holes as a guide, I've made some fairly compact boards this way, but you need plenty of patients and a steady hand.
I would rather spend a couple of hours making a PCB this way, then use vero board ;D.
If all goes well, I should only need to make a few more PCB using this method, then I can use my mill to make my PCB's ;D. I don't think there would be any think easier then using a mill to make PCB's 8).
Hi, Alun, Ante and MP :)
Sorry for the late reply.
Thanks for the welcome back Alun. yes it's my own design ;), it's a make it up as you go along design ;D.
Yes I'm still around Ante 8), I just haven't had as much time to spend here lately as I would like, and it's going to be that way for awhile unfortunately :(.
Well I've had a win in obtaining some large stepper motors :D, I got a half-dozen large printers and copying machines from a junk yard, I salvaged all sorts of goodies from them and these things were dirt cheap 10$ for the lot :o, I got about 18 stepper motors large and small and some of the large ones seem to have their own drivers, I think these steppers might be strong enough to get me going if I gear them down enough, I don't mind if my mill moves slow, it's more important for now that it can cut the materials that I need and its accurate ;).
Apparently there was a guy in Sydney Australia, that was selling a video showing exactly how you convert an alternator to a stepper motor, many years ago. I guess the reason why there isn't much information out there for converting an alternator to a stepper, is it probably doesn't work very well :-\, but still I would like to give it a go, I have some ideas on how to go about it, but I'll wait until I've got my mill up and running with the steppers I have now, at least I'll have a better idea on the steppers that would be required to drive this mill efficiently.
MP, that is very very helpful :D, thank you.
It will be awhile before I try converting an alternator to a stepper, but I definitely will give it a go after I get my mill up and running, and I'll let you know how it turns out.
Thanks for your replies, it's very much appreciated.
Well I think I'm about halfway through building my milling machine, and I can see that I'm going to run into problems obtaining stepper motor's for it, it's turned out to be rather large and all steel construction, and I think I'm going to be needing some stepper motors for it "with some grunt ;D" there are plenty of stepper motors available to do the job, but they are rather expensive :o, and maybe this could be a cheaper alternative :-\.
Any information on converting a car alternator to be used as a stepper motor, would be greatly appreciated.
This topic has been moved to [Circuit/General Requests].
Hi Kasamiko :),
This is the colour code standards for Ford, and this comes from a "repair and service manual" for an XD Falcon.
The first letter of the code
represents the main wire colour,
the other letters represents the
trace colour and where a sleeve
is installed on the wire the colour
of the sleeve is indicated by the
letters enclosed in brackets.
B - black
L - blue
G - green
R - red
Y - yellow
W - white
N - brown
O - orange
K - pink
S - grey
V - violet
P - purple
X - light green
Z - light blue
M - dark green
T - dark blue
A - light brown
E - slate
D - tan
I know that the very early VW manufactured in Germany, had a positive ground.
Hope this helps :).
javaman, I have about 20 or so of electronics Australia magazines, the earliest one I have is August 1981.
Let me know which ones you're chasing. You wouldn't happen to have (silicon chip march 1992) in your collection??
That software looks to be exactly what I've been looking for :D, and it looks like it is very user-friendly as well.
Thanks again :).
Kasamiko, was your PlayStation Mod Chip installation a success?
There seems to be a few different types of Mod Chips that you can install into a PS 1, do you have the wiring diagram for this particular Mod Chip.
MOVED: pcb and assembly!
in Electronic Projects Design/Ideas
This topic has been moved to Sell/Buy electronics - Job offer/requests.Wrong board