Jump to content
Electronics-Lab.com Community

Need Help Buiding the project using lm386


Recommended Posts

Why didn't you post the schematic or link to it? It is this project:

The datasheet for the LM386 shows how to connect it. It does not use a 22 ohm resistor and it does not use a 0.22uF capacitor. It is supposed to be 10 ohms with a 0.05uF (use 0.047uF) capacitor.

The text lies about its output power of 1W. Its power at clipping with a 6V supply is only 0.2W and its power at clipping with a 12V supply is only 0.53W and the IC gets very hot.

Link to comment
Share on other sites

  • 3 weeks later...

22E is the alternative reference of 22 ohms.
Lots of circuits refer to values such as 2E2 = 2.2 ohms, 680E = 680 ohms,
1E5 = 1.5 ohms,  330E = 330 ohms and so on .
I am sure this arises from the missing "omega" (ohm) font in most computers.

I don't know where you heard that but it seems wrong to me, perhaps it's foreign? It certainly isn't English.

Normally the letter R is used if it isn't possible to use Ω, for example: 22R = 22Ω, 2R2 = 2.2Ω and 0R22 = 0.22Ω. For larger values the prefix can be used instead of the decimal place, 2k2 = 2.2kΩ = 2,200Ω.

I've seen the letter W used on some foreign articles but never the letter E.

In my view the letter E should never for Ohms be used because it can be too easily be confused with the exponent, for example 125E3 = 125
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...