How do I identify a resistor ?

[sc_rufctr]

Originally Posted by DanielDudley

And what is the idiot's guide ?

Do you mean the "Nerd Perks" card?

Have you ever noticed the colored stripes on a resistor? On the left of the card it shows the resistor color codes.

This may be more helpful.

[dad911]

No card, still remember:
Big Boys Race Our Young Girls But Violet Generally Wins.... and a few other less PC versions.

[DanielDudley]

Originally Posted by sc_rufctr

Do you mean the "Nerd Perks" card?

Have you ever noticed the colored stripes on a resistor? On the left of the card it shows the resistor color codes.

This may be more helpful.

I have seen the stripes. It did not help for me that the diode was orange with black ''stripes''. It has been 45 years since I messed with any of that stuff. I assembled a Heathkit stereo, and that was about it. This is a big help for me, and I appreciate it.

Thanks, Guys.

[T77911S]

Originally Posted by dad911

No card, still remember:
Big Boys Race Our Young Girls But Violet Generally Wins.... and a few other less PC versions.

bob brown rapes our young girls but violet gives willingly .

[red-beard]

Bad boys rape our young girls, but violet goes willingly

The only thing you have to remember is "black brown" at the start.

[red-beard]

The old GE MK IV control systems had a 4-20mA input section and the fuse was rated too high (0.5 amps). If you applied 24VDC to the circuit, the resister would blow, saving the fuse. I kept lots of the the correct resistors around. I would go to an electronics store, go to the precision bin and then use a meter to check and find the ones that were PRECISELY 250 ohms. These were 1/4 Watt resistors.

I'd assign an electrical tech and a few minutes later, everything was working.

[MBAtarga]

Alligator clips can be used as a heat sink as well. As close to the soldering location as possible decreases the amount of heat hitting the component.

[fintstone]

On an automotive gas gauge, a 12v 1N4742A 1W zener diode seems more likely. What did the gauge come off of?
https://www.ebay.com/itm/New-10-Pcs-x-1N4742A-1N4742-ZENER-DIODE-1W-12V-SALE/151138408274?_trkparms=aid%3D222007%26algo%3DSIM.M BE%26ao%3D1%26asc%3D20160908110712%26meid%3D353d02 363be44fca8e5eee5a6fb0f8eb%26pid%3D100677%26rk%3D3 %26rkt%3D30%26sd%3D221743500814&_trksid=p2385738.c100677.m4598

[Robert Coats]

Originally Posted by dad911

No card, still remember:
Big Boys Race Our Young Girls But Violet Generally Wins.... and a few other less PC versions.

I was taught a slightly more bawdy version:

Bad Boys Rob Our Young Girls But Violet Gives Willingly.

[DanielDudley]

Originally Posted by fintstone

On an automotive gas gauge, a 12v 1N4742A 1W zener diode seems more likely. What did the gauge come off of?
https://www.ebay.com/itm/New-10-Pcs-x-1N4742A-1N4742-ZENER-DIODE-1W-12V-SALE/151138408274?_trkparms=aid%3D222007%26algo%3DSIM.M BE%26ao%3D1%26asc%3D20160908110712%26meid%3D353d02 363be44fca8e5eee5a6fb0f8eb%26pid%3D100677%26rk%3D3 %26rkt%3D30%26sd%3D221743500814&_trksid=p2385738.c100677.m4598

That looks a lot more like it Fint, but the numbers clearly read 40 04.

It's a Veglia Borletti gauge out of an 81 fuel injected Fiat Spider 2000.

Edit; Ordered a few anyway.

[dad911]

Just curious, did the diode swap work out?

[Don Ro]

Originally Posted by red-beard

Bad boys rape our young girls, but violet goes willingly

And then the tolerance rates:
Gold
Silver
No color
.
"Get Some?" "No."

Jingles are great for bad a memory, eh?

[red-beard]

Originally Posted by dad911

No card, still remember:
Big Boys Race Our Young Girls But Violet Generally Wins.... and a few other less PC versions.

I was only taught the less PC version...Willingly

[scottmandue]

Originally Posted by MBAtarga

Alligator clips can be used as a heat sink as well. As close to the soldering location as possible decreases the amount of heat hitting the component.

Forceps work well too if you have some handy.