90% of electronic calculations can be done in your head. Need a pullup resistor? 4.7K. Lowpass filter? 1K, 1 uF, tau=1 ms, 160 Hz. Opamp gain of +5? 1K and 4.02K. Close enough.
John
90% of electronic calculations can be done in your head. Need a pullup resistor? 4.7K. Lowpass filter? 1K, 1 uF, tau=1 ms, 160 Hz. Opamp gain of +5? 1K and 4.02K. Close enough.
John
TheGlimmerMan:
I believe that you believe it.
Even a firecracker is smarter than you and louder than your mouthfarts. That's why I believe that, from your point of view, the firecracker you lit on 7/4 is a smart bomb. Fond memories, uh?
There is a difference between approximate and damn sloppy.
I have a K&E LogLog duplex VersaTrig, do you have a slide rule? It normally provides 2 to 2-1/2 digits accuracy (~0.5%); much better than just about 1 digit (10%)
A mind. As said by another here," Engineering is the art of making what want out of what you have."
1.8,=20
Check the scales on the illustration again.
Interpolation like you mentioned is easy, BUT the _accuracy_ decreases as the number approaches 9 (best between 1 and 2).
2.2k. red-red-red
josephkk:
Where do you put the limit? Should'nt it be related to the application? It seems that you lack the basic understanding of the trade.
Yes, because engineers are the only ones using it.
Exactly. If you are driving and you hear on the radio the forecasted temperature expressed in an idiotic unit of measure, what do you do? Pull over and start your calculations or get a cold?
10K. Markings make no sense anyway, even if you can read them.
PKB
I liked those carbon comps black-black-black. One good for corporate politics: brown-brown-brown for the brown-nose-ers.
It won't do any good. All he understands is 'metric'. :(
-- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated.
Only if you're so brain dead you can't do the math in your head.
-- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated.
Michael A. Terrell:
Much better than nothing.
Not better than nothing.
-- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated.
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