Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
My multimeter, DT830B Digital Multimeter, is giving a negative average of -3 volts by default that means that even without connecting the leads it reads a negative number. The only part of the multimeter that dosen't appear to have the bias is the ohms reading ...
When I connect it to a 9 volts...
Thanks for the worries! I don't mind the "abrasive corrections",you guys have the experience not me, so I should take the advice in extreme consideration. But some times, due to lack of parts, and of different power supplies to work with, the project sounded like a good idea. But I will...
I made a second power supply with new capacitor and using just one diode, it did work! :razz: But I am too afraid to use it, as it sounds awful :shock: haha
It wasn't a mistake on the drawing! What you said about the 220v line in the 120v transformer could explain the weird sounds and why my...
Yeah, it was a mistake, next time i wil record every detail before presenting it here :) The noise that i heard indicated that the transformer could be also backwards, so i will test him also to see if it is was not inverted and also not burned.
Thanks!
I just took it apart, as it was already fried, but i guess that i should have had a better picture of it, because i cant confirm if diodes were in the wrong order as you said. But maybe that was really the problem ! thanks for the help !
I tried to make a simple connection with just one, new...
I tried to make a simple power supply with some components that I had lying around, and it just began to make some weird noises, that ended up burning two of the diodes that made up the full-wave rectifier ( using the 4 diodes ).
I do not have much experience yet so I could have done some...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
