All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > The Projects Forum


The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

Reply   Post New Thread
Thread Tools Display Modes
Old 11-19-2012, 10:27 PM
sonofptolemy sonofptolemy is offline
Junior Member
Join Date: Nov 2011
Posts: 11
Default Choosing the right transistor for switching application

Hi guys,
I need to create module that can switch between loads.

There are two input banks, each bank will take about 30V max.
For each bank I must have TTL outputs for Voltage and current measurements. In the requirements I have specified that there should only be one voltage feedback and one current feedback, and an input switch to switch between banks.

I have the basic idea in my head.

But I'm somewhat limited in my experience with Mosfets, BJTs and transistors as switches in general. I've used them for school projects but I never actually selected them I was either given them or my team mates and I would use what was available from scrap electronics etc and looked up their datasheets. I have built robots and such this way. But this time I need to actually do it properly and intentionally.

Can I get a push in the right direction as to which kind of transistor I should use and how to select it?

I think I need Power Mosfets, but what kind?
Reply With Quote
Old 11-20-2012, 02:58 AM
wayneh wayneh is offline
Senior Member
Join Date: Sep 2010
Location: Roscoe, IL
Posts: 7,513

Originally Posted by sonofptolemy View Post
I have the basic idea in my head.
Well that's good, but I couldn't make heads or tails of your description. Can you draw out a block diagram of what you want your switch(es) to do?

You mention using a transistor. Do you not want to use a mechanical switch?
Reply With Quote
Old 11-20-2012, 03:26 PM
tshuck tshuck is offline
E-book Developer
Join Date: Oct 2012
Location: Long Beach, CA
Posts: 3,004
Blog Entries: 1

...also, what is your switching frequency?
Reply With Quote
Reply   Post New Thread

, , ,

Related Site Pages
Section Title
Worksheet Microcontroller principles
Worksheet Switched capacitor circuitry
Worksheet Multiplexers and demultiplexers
Worksheet Multi-stage transistor amplifiers
Worksheet Insulated gate field-effect transistors
Worksheet Junction field-effect transistors
Worksheet Class B BJT amplifiers
Video Lecture Op Amp Applications - Op Amps and Op Amp Circuits
Video Lecture Digital Applications - Transistors and Transistor Circuits
Video Lecture MOSFET Amplifiers - Transistors and Transistor Circuits

Similar Threads
Thread Thread Starter Forum Replies Last Post
Choosing a MOV for my application. ahgan84 General Electronics Chat 1 04-26-2012 02:27 AM
Probability of choosing a defective IC two times Jess_88 Math 1 06-03-2011 11:21 AM application mrudul Programmer's Corner 1 02-09-2011 05:57 PM
stellaris bootloader in application embed_v Embedded Systems and Microcontrollers 0 10-21-2010 10:56 AM
choosing mosfet and driver for HBRIDGE application sam1sudha The Projects Forum 0 06-17-2010 08:59 AM

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 02:24 AM.

User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.