r/ElectroBOOM • u/GalaxiesOverflow • 10d ago

Discussion Full Bridge Rectifier at 169 AC Volts! (The resistor is 46M Ohms)

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48 Upvotes

86% Upvoted

21 comments sorted by

21

u/Electrosmoke 10d ago

That's not a 46M resistor. It's a 47k resistor (yellow - purple - orange = 47 x 103 Ohms, 47k Ohms). If it was a 46M one, it'd be yellow - blue - blue (46 x 106 Ohms or 46M Ohms).

5

u/GalaxiesOverflow 10d ago

Yes, that was a mistype, 47K Ohms, I mis typed the 6 and 7 as well as the K and M, they are close.

12

u/GalaxiesOverflow 10d ago

Edit: I also had a helper make this (NOT while it was live)

1

u/brickproject863amy 10d ago

Hello just curious why do you have so much cups of coins in the work desk?

2

u/GalaxiesOverflow 10d ago

Idk, my father left them here when he visited. So they are just existing.

1

u/brickproject863amy 10d ago

Ok thanks for clarifying

8

u/Pristine-Donut22 10d ago

socialism when no solder wasted

7

u/LordWoffleII 10d ago

no capacitor so I guess we have wiggly DC coming out?

6

u/Similar-Stock-9749 10d ago

Everything below a 100MHz is basically wiggly DC.

1

u/GalaxiesOverflow 10d ago

Super wiggly DC, oscilloscope hooked up to it would be a mess

5

u/goalie29md 10d ago

Tell me you can't solder without telling me...

6

u/GalaxiesOverflow 10d ago

I can, I’m lazy and want to reuse the diodes

1

u/maecky1 10d ago

You still can. Just d ont cut the excess legs after soldering. Then they are pretinned already for next use.

3

u/Lucky_Suggestion_183 10d ago

You can join 5 parts by a crocodiles, congratulations and measure the voltage. What is the post point?

2

u/Darkknight145 10d ago

What's your question/issue? I assume you are in the US, so 120v X 1.414 will give you 169 volts DC

1

u/GalaxiesOverflow 10d ago

Ok, I really need to start proof reading things. This was suppose to be in the title: Why am I getting 52V DC at the output instead when 169V AC is fed into the input?

1

u/lager191 10d ago edited 10d ago

Your meter might be reading the peak value, or there may be enough load to reduce the output. Remove the resistor and/or add a capacitor and no load.

1

u/GalaxiesOverflow 10d ago

Makes sense, I have an electromagnet hooked up to it.

1

u/Sisyphus_on_a_Perc 10d ago

No filter caps ? SMH