4 uses for resistor??? - Electronic Circuits Projects Diagrams Free

umer007 · 30th December 2003, 05:45 AM

can sumoen plz gimme 4 uses of a resistor. for ex: slows down current

Someone Electro · 30th December 2003, 05:54 AM

This meabe:
1 Limits curent
2 Limits voltage
3 As a pudown resistor(Digital driving a transistor)
4 As a feedback at Op. Amps

Styx · 30th December 2003, 01:05 PM

lol homework kinda looking.

1) power disipater
2) voltage divider
3) current divider/shunt
4) Fantastic use of an industrial pacement student in sorting
5) current limiting (for C/L time constant or in a current source)

dingo · 30th December 2003, 10:27 PM

used to use 10 ohm ones across 12v to light smokes with :roll:

Someone Electro · 31st December 2003, 04:54 AM

Litnig a smoker?The resistor is thean burned out.Its beter to use some iron wire(I conected this over tvo 4.5 v baterys and the iron wire golvd red,whith a tiner one it functones as a light bulb)

stevez · 31st December 2003, 02:27 PM

Must be homework.

Resistors can be and are used as heating elements.

Sometimes one is used in a thermostat on a home heating system - to actually slightly warm the thermostat element so that the heat doesn't stay on too long. I think the term "anticipator" is used. It's not a lot of heat but apparently makes a difference in how well the control works.

One project I looked at recently used power resistors to supply heat to stabilize an oscillator. A controller varied the power to the resistors to maintain a constant temperature.

**Nigel Goodwin** · 31st December 2003, 03:27 PM

Quote:

Originally Posted by stevez

One project I looked at recently used power resistors to supply heat to stabilize an oscillator. A controller varied the power to the resistors to maintain a constant temperature.

Crystal ovens commonly work in the same way.

We used to have two (very old) cable systems at work, one was 405 VHF only (I told you they were old!) - the other was VHF 405 and 625 (with the UHF 625 converted down to VHF). The down converters were built in diecast aluminium boxes, and used simple free running LC local oscillators, to keep them reasonably stable they had a couple of large wirewound resistors inside to keep them warm :lol:

The down-converters were transistorised, everything else on both systems was valve! - it was really horrible, we were very pleased to scrap them both when local UHF relay transmitters eventually appeared.

pebe · 31st December 2003, 09:01 PM

[quote="Nigel Goodwin"]

Quote:

Originally Posted by stevez

We used to have two (very old) cable systems at work, one was 405 VHF only (I told you they were old!) - the other was VHF 405 and 625 (with the UHF 625 converted down to VHF). The down converters were built in diecast aluminium boxes, and used simple free running LC local oscillators, to keep them reasonably stable they had a couple of large wirewound resistors inside to keep them warm :lol:............

Wolsey?

**Nigel Goodwin** · 31st December 2003, 09:22 PM

Quote:

Originally Posted by pebe

Wolsey?

Yes! - you've obviously had experience with them as well :wink:

pebe · 31st December 2003, 09:27 PM

Quote:

Originally Posted by Nigel Goodwin

Quote:

Originally Posted by pebe

Wolsey?

Yes! - you've obviously had experience with them as well :wink:

Yes, quite a bit

John Sorensen · 2nd January 2004, 12:02 AM

"used to use 10 ohm ones across 12v to light smokes with"

Well, this is an extremely low resistance example, but I used to serve on a submarine and they would keep the O2 level low to supress/prevent fires. In those days, smoking was allowed... but the O2 level was too low to light a match, so the desperate would put a strand of a wire across the terminals of a 6V lantern battery to light their coffin nails.

j.

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30th December 2003, 05:45 AM	(permalink)
umer007	4 uses for resistor??? can sumoen plz gimme 4 uses of a resistor. for ex: slows down current

30th December 2003, 05:54 AM	(permalink)
Someone Electro	This meabe: 1 Limits curent 2 Limits voltage 3 As a pudown resistor(Digital driving a transistor) 4 As a feedback at Op. Amps

30th December 2003, 01:05 PM	(permalink)
Styx	lol homework kinda looking. 1) power disipater 2) voltage divider 3) current divider/shunt 4) Fantastic use of an industrial pacement student in sorting 5) current limiting (for C/L time constant or in a current source)

30th December 2003, 10:27 PM	(permalink)
dingo	used to use 10 ohm ones across 12v to light smokes with :roll:

31st December 2003, 04:54 AM	(permalink)
Someone Electro	Litnig a smoker?The resistor is thean burned out.Its beter to use some iron wire(I conected this over tvo 4.5 v baterys and the iron wire golvd red,whith a tiner one it functones as a light bulb)

31st December 2003, 02:27 PM	(permalink)
stevez	Must be homework. Resistors can be and are used as heating elements. Sometimes one is used in a thermostat on a home heating system - to actually slightly warm the thermostat element so that the heat doesn't stay on too long. I think the term "anticipator" is used. It's not a lot of heat but apparently makes a difference in how well the control works. One project I looked at recently used power resistors to supply heat to stabilize an oscillator. A controller varied the power to the resistors to maintain a constant temperature. __________________ stevez

2nd January 2004, 12:02 AM	(permalink)
John Sorensen	"used to use 10 ohm ones across 12v to light smokes with" Well, this is an extremely low resistance example, but I used to serve on a submarine and they would keep the O2 level low to supress/prevent fires. In those days, smoking was allowed... but the O2 level was too low to light a match, so the desperate would put a strand of a wire across the terminals of a 6V lantern battery to light their coffin nails. j.