Subject:
|
Re: 100 sensors
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Wed, 12 Mar 1997 19:59:50 GMT
|
Original-From:
|
rabbit <[g-webb@students.uiuc.edu]spamless[]>
|
Viewed:
|
1662 times
|
| |
|
|
On Wed, 12 Mar 1997, MAR ERICSON wrote:
> What's a resitor ladder?
> Is there a textbook or something where I can get a schematic?
A resistor ladder is simply several resistors, connected in
series with a switch between each one. On the handyboard you would do
something like this:
VCC ---\/\/\/---\/\/\/---\/\/\/---\/\/\/----------
| | | | | |
\ SW1 \ SW2 \ SW3 \ SW4 \ SW5 |
\ \ \ \ \ |
| | | | | |
| | | | | |
SIG --------------------------------------| |
|
GND ----------------------------------------------
SW1-4 are your switches or any other digital (here, on/off) device.
\/\/\/ are the resistors which can be just about any value as long as
they are all the same (unless you want a non linear response)
The idea is that the voltage drops by VCC/(# of resistors) after every
resistor. By putting a switch at each voltage drop you can get a as many
different voltages as you have resistors on your SIG (signal) lead. This
signal would go to the analog input of the handy board.
> Is is same as a D-A converter?
Yes this is a D-A converter.
Garth
|
|
Message is in Reply To:
 | | Re: 100 sensors
|
| What's a resitor ladder? Is there a textbook or something where I can get a schematic? Is is same as a D-A converter? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
|
3 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
