Can I tent/combine any of these values to make 750R?

[CheapSuitG]

That is how you get THE TOANZ.

I'm just here wondering what my guy @Feral Feline needed a precisely 330147 Ohm resistor for.

 

[Feral Feline]

Y’ wha…? oh, ah yesss.

They say madness runs in our family.
Ehhh... Some even call ME mad. And WHY? Because I dared to dream of my own board of atomic monster-pedals.
Atomic SUPER-pedals, with octagonal-shaped enclosures that suck the blood out of the player to power them…



HEY! NO CAMERAS!
YOU'VE SEEN TOO MUCH AND NOW I MUST K...
Okay okay, it's okay...

Here, come try this overdrive, I made it myself — use this coily-cable, just plug in here... ◉

 

[bean]

Something wrong with putting two 1k5 in parallel? When has 1k5 ever done you wrong?

 

[Feral Feline]

Something wrong with putting two 1k5 in parallel? When has 1k5 ever done you wrong?

Th TH THAT's just... just... CHEATIN'!

One-kay-five wasn't in the list of available values, highest value from the OP's list was 820r.

 

[lowpitch]

Th TH THAT's just... just... CHEATIN'!

One-kay-five wasn't in the list of available values, highest value from the OP's list was 820r.

Easy. Follow me for more awesome tips and tricks!


More resistors = more TOAN

 

[KR Sound]

Easy. Follow me for more awesome tips and tricks!

View attachment 92253
More resistors = more TOAN

Winner winner, chicken dinner.

 

[bean]

Th TH THAT's just... just... CHEATIN'!

One-kay-five wasn't in the list of available values, highest value from the OP's list was 820r.

Ahh. Well, in my defense I subcontract out my forum replies to this guy.

 

[Feral Feline]

Easy. Follow me for more awesome tips and tricks!

View attachment 92253
More resistors = more TOAN

I was thinking of trying to max out the number of resistors from those listed in the OP.
There's huge potential to do so, because of the broad range in values — for example 1r parallel to 820r = 0r99878 — and the fact that there's 20 of each value, 700 resistors in total.


1 R x 20 = 20Ω
1.2 x 20 = 24Ω
1.5 x 20 = 30Ω
1.8 x 20 = 36Ω
2.2 x 20 = 44Ω
2.7 x 20 = 54Ω
3.3 x 20 = 66Ω
3.9 x 20 = 78Ω
4.7 x 20 = 94Ω
5.6 x 20 = 112Ω

6.8 x 20 = 136Ω
8.2 x 20 = 164Ω
10 x 20 = 200Ω
12 x 20 = 240Ω
18 x 20 = 360Ω
22 x 20 = 440Ω
27 x 20 = 540Ω
33 x 20 = 660Ω
39 x 20 = 780Ω
47 x 20 = 940Ω

56 x 20 = 1120Ω
68 x 20 = 1360Ω
82 x 20 = 1640Ω
100x 20 = 2000Ω
120x 20 = 2400Ω
150x 20 = 3000Ω
180x 20 = 3600Ω
220x 20 = 4400Ω
270x 20 = 5400Ω
330x 20 = 6600Ω

390x 20 = 7800Ω
470x 20 = 9400Ω
560x 20 = 11200Ω
680x 20 = 13600Ω
820x 20 = 16400Ω


Out of those, as I see it the rules of the game are to use only those values and quantities listed in the OP, and the outcome must be 750Ω, no more no less.

I've parallel chained some values together and put them in series...



So the following "p" means 2 of that value in parallel and given there's only 20 of each size available, that's 10 pairs per...

68p 34Ω x 10 = 340
56p 28Ω x 10 = 280
18p 9Ω x 10 = 90
5.6p 2.8Ω x 10 = 28
1.2p .6Ω x 10 = 6
1.5p .9Ω x 6 = 4.5
1p .5Ω x 3 = 1.5
= 750

As mentioned, a lot more of the 700 available resistors could be used, but getting rid of odd decimal places to get that final perfect 750Ω is tougher than would first seem.

I didn't spend a lot of time on this, but...
Did I spend wayyyy too much time on this when I could've been populating resistors in PCBs? Yes.
Was this act of senseless exercise fun? Oddly, yes.
Will it be as entertaining for others as it was for myself?
Will I try to use up more resistors in parallel, like five in parallel at a time or greater...? Maybe. Unlikely.
Do I wonder how many resistors out of the 700 would be left over if trying to maximise the number used to achieve 750Ω and what the layout would look like? Most definitely.

 

[GAStan]

Well...if you take four 750Ω resistors, put two in series, the other two in series (each = 1500Ω). Then put each of these in parallel you're back to 750Ω. Do this as many times as you wish, how many resistors do you want to use? In multiples of 4 of course...

Hmmmm yet another exciting Saturday night....

 

[LukeFRC]

You’ve all got too much spare time

 

[Feral Feline]

Well...if you take four 750Ω resistors, put two in series, the other two in series (each = 1500Ω). Then put each of these in parallel you're back to 750Ω. Do this as many times as you wish, how many resistors do you want to use? In multiples of 4 of course...

Hmmmm yet another exciting Saturday night....

I see your point, it's a good one, bonus points for that!
However, the OP did NOT HAVE 750Ω-RESISTORS, that was the point. Twenty (20) of each...

You’ve all got too much spare time

No spare time, just time squandered?

In my defense, I did get 6 out of 8 PCBs populated with resistors last night, but only six because I met with some resistance in the form of missing some values and in one instance a build doc riddled with errors (obviously not for a PPCB board).

So while the OP was missing just 750Ω, I've discovered I've run out of, and need to order the following:

1/8w​

• 560Ω
• 1k
• 1k2
• 3k9
• 4k7
• 10k
• 22k
• 82k
• 100k
• 220k
• 390k
• 470k

1/4w​

• 120Ω
• 560Ω
• 1k2
• 3K9
• 15K
• 100k
• 390k
• 1M
• 3M3
• 3M6
• 3M9
• 4M3
• 5M1
• 5M6
• 6M8
• 7M5
• 8M2
• 9M1
• 11M

 

[GAStan]

However, the OP did NOT HAVE 750Ω-RESISTORS, that was the point. Twenty (20) of each...

Oh sure, bring up reading comprehension again. Minor technicality

 

[JohnnyCreepy]

What’s the value of resistance you get @Feral Feline ?

 

[LukeFRC]

I see your point, it's a good one, bonus points for that!
However, the OP did NOT HAVE 750Ω-RESISTORS, that was the point. Twenty (20) of each...

No spare time, just time squandered?

In my defense, I did get 6 out of 8 PCBs populated with resistors last night, but only six because I met with some resistance in the form of missing some values and in one instance a build doc riddled with errors (obviously not for a PPCB board).

So while the OP was missing just 750Ω, I've discovered I've run out of, and need to order the following:

1/8w​

• 560Ω
• 1k
• 1k2
• 3k9
• 4k7
• 10k
• 22k
• 82k
• 100k
• 220k
• 390k
• 470k

1/4w​

• 120Ω
• 560Ω
• 1k2
• 3K9
• 15K
• 100k
• 390k
• 1M
• 3M3
• 3M6
• 3M9
• 4M3
• 5M1
• 5M6
• 6M8
• 7M5
• 8M2
• 9M1
• 11M

Honest question- why mix 1/4 and 1/2 W?

 

[Robert]

Honest question- why mix 1/4 and 1/2 W?

To control where the fire occurs.

 

[Feral Feline]

I still think using a bunch of 750Ω resistors in series and parallel to get 750Ω total was

Honest question- why mix 1/4 and 1/2 W?

Not my list, it's the OP's — ask the OP.

Actually, now that I think about it for a wee flash — there's at least one MBP project that requires one (1) really robust resistor, while the rest of the build uses regular 1/4w... 'twas a tube-pedal IIRC.

 

[JTEX]

• 11M

11M? That's not even a cromulent value! Who the hack uses 11M? Booo!

 

[LukeFRC]

I still think using a bunch of 750Ω resistors in series and parallel to get 750Ω total was

Not my list, it's the OP's — ask the OP.

Actually, now that I think about it for a wee flash — there's at least one MBP project that requires one (1) really robust resistor, while the rest of the build uses regular 1/4w... 'twas a tube-pedal IIRC.

Nah I was questioning your shopping list of 1/4W and 1/8W - and typed it wrong as I’m full of some virus at the moment!

 

[Feral Feline]

Nah I was questioning your shopping list of 1/4W and 1/8W - and typed it wrong as I’m full of some virus at the moment!

I'm hoping your Virus is gone. Recovered?

 

[LukeFRC]

I'm hoping your Virus is gone. Recovered?

Still got the cough, but no longer a zombie and able to work (from home) and walk the kids to school and nursery - so recovering.
We’ve also had the first glimmers of spring weather so that’s been nice.
Thanks for asking.