Aaron's Homepage Forum
Aaron's Homepage Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Electronics
 Basic Electronics
 How to design a circuit

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG)
   

T O P I C    R E V I E W
mathew086 Posted - Oct 16 2009 : 10:48:26 AM
I am planning to make a capactive touch sensor. I have seen many circuits from google. But i need to know how are the components chosen and how is the circuit designed.? for example how much R or C is to be used? how is the value found?

can anyone help me?

Thanks

Mathew
1   L A T E S T    R E P L I E S    (Newest First)
Aaron Cake Posted - Oct 18 2009 : 10:31:42 AM
On the most basic level, circuit components are chosen based upon requirements of other components. For example, in a touch switch circuit there is likely a main FET or MOSFET that has the touch plate on it's gate. That was chosen bu looking at it's specs and picking a MOSFET of appropriate gain and current/voltage capacity. The components surrounding it (resistors, capacitors) were chosen by applying some basic formulas based on the voltage and current they will see to properly bias the MOSFET (info on that is on the datasheet). Then larger circuits are built from these basic circuit building blocks.

Aaron's Homepage Forum © 1995-2020 AARONCAKE.NET Go To Top Of Page
This page was generated in 0.05 seconds. Snitz Forums 2000