## Search found 1578 matches

Tue Apr 16, 2019 8:05 am
Forum: General Discussion
Topic: Having a problem with a triac
Replies: 10
Views: 3016

### Re: Having a problem with a triac

With 12VAC applied, what do you expect the result to be?
Wed Mar 13, 2019 4:09 am
Forum: General Discussion
Topic: Any integrated circuit that works as the old tone decoder but for RF ?
Replies: 7
Views: 3086

### Re: Any integrated circuit that works as the old tone decoder but for RF ?

haklesup, make that 2.4GHz for Wi-Fi.

Cheers,

Also, 118MHZ to 137MHz is for air traffic control.
Mon Feb 18, 2019 9:55 am
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 95
Views: 26113

### Re: Odd Commercial Products.........

Yes.

Either way, but you clean it afterwards
Sat Feb 09, 2019 4:57 am
Forum: Computer Programming
Topic: Cross Page Posting
Replies: 2
Views: 1551

### Re: Cross Page Posting

I do not know.

But cross section posting would be, for example, asking the same question here in Computer Programming and in General Discussion sections.

Cheers,
Fri Feb 08, 2019 4:21 am
Forum: General Discussion
Topic: surge voltages
Replies: 11
Views: 3302

### Re: surge voltages

Some indication of size? Voltage and current of load being protected?

ie. a computer and printer - a surge protection power outlet strip around \$10 at (like) Home Depot or Lowe's
Or an UPS from (maybe like) Best Buy

Cheers,
Wed Jan 23, 2019 4:53 am
Topic: Reel for lowering a sensor
Replies: 7
Views: 11655

### Re: Reel for lowering a sensor

Lets say 4in diameter spool so we don't bend wire rope too sharply. 4in * 3.141 = 12.5in circumference 10m * 39.37 in per m = 393.7in 393.7in / 12.5 in per turn = 31.5 turns 31.5 turns * 0.125in rope diameter = 4in spool width 'Or - A 4in diameter spool 2in wide with sides more than 1/4in high. Now ...
Tue Jan 22, 2019 11:18 am
Topic: Reel for lowering a sensor
Replies: 7
Views: 11655

### Re: Reel for lowering a sensor

size of line and/or cable?
Thu Jan 10, 2019 7:48 pm
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 10
Views: 12089

### Re: Something Wrong with Coupling Capacitor

Series capacitors have less combined capacitance, not more. Two same value capactors in series are half the capacitance of one.

The amount of effect on bass depends on capacitance, source and load impedances.
Thu Jan 10, 2019 12:45 pm
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 10
Views: 12089

### Re: Something Wrong with Coupling Capacitor

With 5532 I find a TV tuner and a pre-amp IC. Your description sounds more like a radio tuner (with maybe a 5532 on board?), that would make the setup stereo and there would two coupling capacitors between each stage, one for left and one for right. With separate boards each could have capacitors on...
Fri Dec 21, 2018 3:58 am
Forum: General Discussion
Topic: Resistor Color Codes
Replies: 9
Views: 2291

### Re: Resistor Color Codes

Haklesup, I wasn't being short with you. I had just lost the longer answer down the black hole of pressing submit. The link you gave does use the phase "color codes obsolete", then proves they are not. In more and more electronics in the world SMT (which does not use color code) is used. So less per...
Thu Dec 20, 2018 1:03 pm
Forum: General Discussion
Topic: Resistor Color Codes
Replies: 9
Views: 2291

### Re: Resistor Color Codes

No not obsolete!
Thu Dec 20, 2018 4:46 am
Forum: General Discussion
Topic: Resistor Color Codes
Replies: 9
Views: 2291

### Re: Resistor Color Codes

I don't like the explanation at the link you gave either. try - https://en.wikipedia.org/wiki/Resistor_color_code#Resistor_color-coding The space between color stripes is not important; but the really wide gap separates the value stripe from the tolerance and temperature coefficient stripes. The fir...
Sat Dec 01, 2018 7:07 am
Forum: General Discussion
Topic: need help to find blue led bulb
Replies: 17
Views: 3059

### Re: need help to find blue led bulb

I guess you never looked at an LED spec sheet either! LED Reverse voltage 5V PERIOD! LED "bulbs" would have a diode and current limiting (probably not resistor) built in. Dacflyer is not looking for a single blue LED "bulb" at 120VAC. According to link he wants equivelent light to 10W incandescent i...
Fri Nov 30, 2018 1:18 pm
Forum: General Discussion
Topic: need help to find blue led bulb
Replies: 17
Views: 3059

### Re: need help to find blue led bulb

Additional- A resistor's power rating is based on it's max power in free air which is at 25°C. Your calculation for 5mA was still 0.6W. Inside the base and bulb is not free air, it is not 25°C, and the resistor is not alone. So with thermal conductive epoxy (to move heat to metal shell) it might get...
Fri Nov 30, 2018 12:53 pm
Forum: General Discussion
Topic: need help to find blue led bulb
Replies: 17
Views: 3059

### Re: need help to find blue led bulb

You did not look at the page at the link Dacflyer gave. The calculations were for a bulb like that, not a single indicator LED. An LED is a diode, but the PIV is like 5V. For use in a 120VAC circuit another diode (or bridge) with a PIV of at least 200V is needed. With all components in the bulb, The...