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I'm not up on fan terminology-why is brushless important (consumes less power as you said or are there another reasons?)
Thanks for the link-I love Tony's site-It's where I got my power supply circuit. :)
Don't know if this would be useful or not to any beginners here, but I just wrote a tutorial on creating vents (for fans/general heat dissipation) in electronic project cases.
See, I'm kind of a cheap guy, and I buy those cheap Radio Shack project cases that don't have vents or holes (for...
110 a 12 con zenner
Wow, guys, thanks for the great info! Sounds like I should dump the Zener idea and go with either a 7812 or another 317?
I've been reading about using a 3055 relieving the zener of current concerns, (if I read the article correctly), but I think I'll just lose the zener...
zener regulator calculator
mcoster-
Thanks for the heads up-but I've already made the power supply with the 317t. :)
I'm just using a resistor/zener to regulate enough voltage to power a 12 volt fan prior to hitting the 317t, straight out of the filter cap.
What's the best solution (no pun intended) for removing ink resist from homemade pcbs?
Every how-to I read simply says remove it, but doesn't suggest what chemical is best (I'm using a sharpie to draw the lines, but am getting ready to switch to transparent laser prints).
Thanks.
zener diode resistor
I want to use a 12Volt zener diode and a resistor to bring an unregulated 36V input down to 12 volts to run a 12V/110mA fan. I used the calculator here:
**broken link removed**
Entering the values 36 for input, 12 for Zener voltage, 110 for mA, it says I need a 200ohm...
I can read a schematic pretty well, and I can breadboard most circuits from those schematics, but when it comes to going from a schematic to a printed circuit board, I get lost!
Anyone have suggestions for going from schematics to designing the layout of a pcb? It may be that I have only...
I just bought my first function generator–a used Tektronix cfg250. Unfortunately, there was no manual of any kind.
I'm primarily using it to feed a signal into parts of a circuit, then use a scope to see how the signal changes.
But another part of the fg is Sweep (internal/external), Sweep...
hp 1725a
Just picked up a Tektronix CFG250 function generator and an HP 1725a oscilloscope for about $200 U.S.
Both work great, but I'd like more information about advanced features of both, as well as schematics, etc., without paying a small fortune for either.
Anyone know where I can get...
Okay, if we're talking absolute beginner stuff, then Forrest Mims' book-Getting Started in Electronics got me into the hobby and helped me learn to read schematics.
Perhaps a book alone isn't sufficient- try a learning lab such as his Learning Lab with all parts and manuals included. Great...
The best electronics book (beginner or otherwise) I've read is Practical Electronics for Inventors Incredibly detailed info starting with the basics, with many many practical circuits to try out the theory. Every chapter is a smorgasbord of formulas, examples, and technical data on just about...
Re: AC Power Supply
Thanks for the info. I didn't think it would be that simple. :)
I guess I was hoping to find an AC power supply circuit to build (if one exists)–I'm in the "new to electronics and can't wait to build my next project" phase.
Take care.
Okay, this IS the elementary electronics board, so bare with me...
I just finished 2 variable 1.2-30V/2A regulated DC power supplies (one made with perf board and wire, the other with etched board), and it was much easier (and fun!) than I thought (of course, having a schematic drawn by someone...
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