Jump to content
Electronics-Lab.com Community

Re: what is trimmer


Staigen

what is trimmer  

1 member has voted

  1. 1. what is trimmer

    • what is trimmer
      0
    • what is trimmer
      1


Recommended Posts

Hi there ateso8634, welcome to this forum

thing named trimmer

They mean a trimpot, it is an adjustable potentiometer, usally adjusted with a screwdriver.

how many junction point it has

It usally have 3 connections, but i have seen trimpots with 2 connectors and also(for special purposes) with 4 connectors.
So, it is an adjustable resistor

//Staigen
Link to comment
Share on other sites


Hi Staigen,
The project's http://www.electronics-lab.com/projects/sensors/016/index.html IR photodiode and opamp circuit is interesting.
At first I thought:
1)Where is the reverse bias voltage for its IR photo-diode, so it can leak current (conduct) when it receives radiation?
2) Where is the negative supply for its opamp?

Then I realised that the IR photo-diode is used in a photovoltaic mode, generating a negative current like a solar cell.
And its parts list spec's a single-supply LM358 opamp that works fine with its inputs at its negative supply (ground). ;D

Link to comment
Share on other sites

Hi ateso8634
if you have a 10k ohm 3 terminals trimmer  you can use it instead of the 2 terminals one.
look at the 3 terminals trimmer's terminals, they look like a triangle there is one is far and two close,  connect (short) the far one with one of the remaining two then you have two terminals trimmer as you want.
hope this help you. 

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.

Guest
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.

Loading...
×
  • Create New...