[QUOTE=DrLuke;35721234]High quality chinese soldering job:
[img]http://i.imgur.com/a2MiU.png[/img][/QUOTE]
High quality German soldering job:
[img]http://i55.tinypic.com/51u17d.png[/img]
Built an adapter to go from 50 pin floppy interface for 8" drives to 34 pin 5.25" floppy drives.
It turned into a nightmare.
[code]8" controller 5.25" Drive
1 o
2 o
3 o
4 o
5 o
6 o
7 o
8 o
9 o--Gnd-----+
10 o--2 side--+
11 o
12 o
13 o-----Gnd--------------------o 31
14 o-----Head Select------------o 32
15 o
16 o
17 o
18 o
19 o-----Gnd--------------------o 7
20 o-----Index------------------o 8
21 o-----Gnd--------------------o 33
22 o-----Ready------------------o 34
23 o
24 o
25 o-----Gnd--------------------o 11
26 o +----Drive Sel 2------------o 12
27 o +
28 o + +----Gnd---------------o 15
29 o + +----Motor On----------o 16
30 o--+
31 o
32 o
33 o-----Gnd--------------------o 17
34 o-----Direction--------------o 18
35 o-----Gnd--------------------o 19
36 o-----Step-------------------o 20
37 o-----Gnd--------------------o 21
38 o-----Wr Data----------------o 22
39 o-----Gnd--------------------o 23
40 o-----Wr Gate----------------o 24
41 o-----Gnd--------------------o 25
42 o-----Trk 00-----------------o 26
43 o-----Gnd--------------------o 27
44 o-----Wr Prot----------------o 28
45 o-----Gnd--------------------o 29
46 o-----Rd Data----------------o 30
47 o
48 o
49 o
50 o[/code]
[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/100_2794.jpg[/IMG]
[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/100_2793.jpg[/IMG]
[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/100_2795.jpg[/IMG]
It's hardwired to drive ID 3 but can be set to any together ID between 0 and 3 by moving one wire.
The two sets of random red and black wires have a purpose. One turns the motor on and off on the drive, the other tells the disk controller if the media is single sided or double sided.
Ordered some AD5932 Programmable single-scan waveform generator samples, basically just a DDS IC that can sweep frequency up to a maximum of 25MHz.
I plan to use it as part of a network analyser so I can see the response of various filter circuits.
I added some chokes to the transmitter I posted bout a month ago, and the chokes did cut down on interference. I still need to replace out the varicaps.
And the lead for my antenna broke...
[QUOTE=Chryseus;35736827]Ordered some AD5932 Programmable single-scan waveform generator samples, basically just a DDS IC that can sweep frequency up to a maximum of 25MHz.
I plan to use it as part of a network analyser so I can see the response of various filter circuits.[/QUOTE]
As soon as I'm enlisted in a university I'll be sampling stuff all day long
[QUOTE=DrLuke;35745345]As soon as I'm enlisted in a university I'll be sampling stuff all day long[/QUOTE]
You don't need to be in a university to sample stuff.
[QUOTE=Chryseus;35745440]You don't need to be in a university to sample stuff.[/QUOTE]
You have to be for some of the more interesting companies like Analog Devices.
[QUOTE=DrLuke;35749139]You have to be for some of the more interesting companies like Analog Devices.[/QUOTE]
No
They've already sent mine.
That's weird, they wouldn't send it to me without being in either a company or university, maybe this depends on the country?
[QUOTE=DrLuke;35749926]That's weird, they wouldn't send it to me without being in either a company or university, maybe this depends on the country?[/QUOTE]
Did you use a free email like @gmail or @hotmail? They say on the registration form that they will not send free samples if you register using free email addresses like those.
of course not
[QUOTE=DrLuke;35754282]of course not[/QUOTE]
Guess they've already seen some of your endeavors in designing circuits, and basically went: "fuck it, it's better to dump 'em into the trash container"
[QUOTE=Van-man;35755390]Guess they've already seen some of your endeavors in designing circuits, and basically went: "fuck it, it's better to dump 'em into the trash container"[/QUOTE]
let's see some of your work then
[QUOTE=DrLuke;35755511]let's see some of your work then[/QUOTE]
Mine's only simple power supply designs or repair on existing equipment.
But at-least I know when what I'm doing is stupid and stop before frying shit or electrocuting myself.
That said I [B]DO[/B] wanna expand my knowledge and skills, but I lack the funds and free time.
Plus its fun just to be innovative and see what you can create with what you scavenge
[QUOTE=Van-man;35757281]Mine's only simple power supply designs or repair on existing equipment.
But at-least I know when what I'm doing is stupid and stop before frying shit or electrocuting myself.
That said I [B]DO[/B] wanna expand my knowledge and skills, but I lack the funds and free time.[/QUOTE]
So you are calling me stupid because I try out new things and in the process sometimes damage components?
You can't be serious
[QUOTE=DrLuke;35758503]So you are calling me stupid because I try out new things and in the process sometimes damage components?
You can't be serious[/QUOTE]
Difference between you and, I is that I do my research and employ common sense plus good design ethics.
[I]Do it right or don't do it at al[/I]l, How the hell did you manage to forget that?
Could you show me an example where I recently have done something outright stupid that could've been prevented?
[QUOTE=Van-man;35758985]Difference between you and, I is that I do my research and employ common sense plus good design ethics.
[b]Do it right or don't do it at al[/b]l, How the hell did you manage to forget that?[/QUOTE]
I disagree completely and utterly.
Failure is bar none the most important part of learning.
Here, let some people who know way more about failure than I explain it to you:
[media]http://www.youtube.com/watch?v=1825zkmJVuE[/media]
[media]http://www.youtube.com/watch?v=xhQ7d3BK3KQ[/media]
[QUOTE=Van-man;35758985]Difference between you and, I is that I do my research and employ common sense plus good design ethics.
[I]Do it right or don't do it at al[/I]l, How the hell did you manage to forget that?[/QUOTE]
Why are you so hostile? Is it really necessary?
Resistors are serious fucking business, mang.
[QUOTE=Zero-Point;35765897]Resistors are serious fucking business, mang.[/QUOTE]
Resistance is futile (if R < 1 Ohm)
First time in this thread! I got an Intel 8032 and set it up with a 27C256 EPROM. Got it to count on a 4 digit 7 segment display (all 4 digits are independent!)
[IMG]http://gyazo.breakpointservers.com/d2dd2c2fdf468da2eed7a0f5ee269056.png[/IMG]
Few days ago, I pulled a nice microwave from the dumpster, only thing that was dead was the Magnetron (Hope me and magnetrons don't become a running gag..) It had some nice electronics on it, besides the usual HV transformer and cap, I managed to scrounge a nice humidity sensor. They even included the technical manual with the wiring diagrams and everything! One word of warning, be sure to protect your jewels when wrapping up the three pronged plug..
[img_thumb]https://sites.google.com/site/lonewolfscircuits/sitefiles/Microwave_HumiditySensor.jpg[/img_thumb] [img_thumb]https://sites.google.com/site/lonewolfscircuits/sitefiles/Microwave_Guts.jpg[/img_thumb] [img_thumb]https://sites.google.com/site/lonewolfscircuits/sitefiles/Microwave_TechManual2.jpg[/img_thumb]
Anyone know anything about using 7809's in parallel?
[QUOTE=SubbyV-2;35802535]Anyone know anything about using 7809's in parallel?[/QUOTE]
Iffy idea, considering their output voltages may be different having one feed into the other. Other than that, I would think you would just be able to handle more current.
I'd at the very least make sure to use the same brand of 7809 to reduce the output voltage difference.
[QUOTE=SubbyV-2;35802535]Anyone know anything about using 7809's in parallel?[/QUOTE]
Put a 2 ohm resistor in series with the output of each regulator. Prevents for some nasty oscillation effects and stuff like that.
A better solution would be to just get a beefier regulator.
Or use a parallel pass transistor.
Example:
[img]http://www.circuit-projects.com/dimg/LM7812-high-current-power-supply-by-TIP2955-pass-trasistors.gif[/img]
Holy crap... At 24V in, 12V at 30 amps out, that's 360watts you're wasting... That's quite a hefty heatsink.
If you really need that much power, a switch mode supply is a better choice. Much more elegant.
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