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Remote triggered timed/photocell outlet?

I have under-cabinet lighting that I need to control for three separate cabinets. What I'm looking for, off-the-shelf,...
0 comments posted 10yrs
posted by none
0 comments posted 10yrs posted by none

APD suppliers?

Hi folks. Long time no see, last posting was around 2007 IIRC. Does anyone stateside know a source for APDs of the P500...
0 comments posted 10yrs
posted by testing_h
0 comments posted 10yrs posted by testing_h

Why are capstan wheels different size?

Oh, smarter-than-I people, http://imgur.com/WPEoOu1 The 2 belt-drive capstan flywheels in an auto-reverse cassette mech...
22 comments posted 10yrs
posted by not
22 comments posted 10yrs posted by not

Watts vs. VAs

My basic question is: Which one does the power company bill you for? Background: I have one of those "Kill A Watt" thin...
4 comments posted 10yrs
posted by gazelle
4 comments posted 10yrs posted by gazelle

electric razors

How does an electric razor work? Props to the inventor, he's sharper than I am -
0 comments posted 10yrs
posted by rdelaney2001
0 comments posted 10yrs posted by rdelaney2001

Lump in series with LED's Christmas/Holiday lights

I have noticed that about half of the LED Christmas light strings have a "l ump" about 1.5 inches long and 1/2 inch dia...
0 comments posted 10yrs
posted by hrhofmann
0 comments posted 10yrs posted by hrhofmann

microwave blowout

Yesterday, in a cafeteria, I decided to hard boil an egg in a microwave oven (which I never tried hitherto), a minimum...
10 comments posted 10yrs
posted by rdelaney2001
10 comments posted 10yrs posted by rdelaney2001

drones

I notice, with these new toy drones, they all use quad rotor design. Why? I never studied aerodynamics, but I'm willing...
1 comments posted 10yrs
posted by rdelaney2001
1 comments posted 10yrs posted by rdelaney2001

Microcontroller NG

I am somewhat disappointed at the lack of newsgroups dedicated to microcontrollers. Specifically the more popular ones...
1 comments posted 10yrs
posted by kevinfglover
1 comments posted 10yrs posted by kevinfglover

explain this

I use an armband radio while running. The battery compartment lid is damaged, I repaired it using a sophisticated high...
1 comments posted 10yrs
posted by rdelaney2001
1 comments posted 10yrs posted by rdelaney2001

IDFT transform

If we have DFT coefficients, we can reconstruct the signal by using IDFT transform. Read more: http://www.cirvirlab.com...
0 comments posted 10yrs
posted by pchung705
0 comments posted 10yrs posted by pchung705

Parallel R-C circuit impedance

It is obvious that with signal frequency increase, impedance of parallel R-C circuit decreases, since impedance of the...
0 comments posted 10yrs
posted by pchung705
0 comments posted 10yrs posted by pchung705

DIN rails and diodes

I am building an industrial sensor system for warehouse and need to isolate some inputs using blocking diodes (simple r...
6 comments posted 11yrs
posted by not
6 comments posted 11yrs posted by not