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Variable mV output

PostPosted: Wed Sep 21, 2011 9:20 am
by Dritech
Hi all,

This is my first post in this forum.

So basically i want to use an 8051 microcontroller where I will have two input buttons (up and down). Every time the up button is pressed, the output of this 'unknown component' will increase by 10mV. When the down button is pressed, the output will decrease by 10mV. (please see attached photo)

Can someone please help me in what component to use that will increase and decrease the output by 10mV every time the input buttons (up and down) are pressed ??

all kind of help will be appreciated :)

Thank you in advance
Adrian
(Malta)

Re: Variable mV output

PostPosted: Sun Sep 25, 2011 8:01 pm
by Kev
Hi,
The component you want is a D/A (digital to analogue convertor)
There are many types with different resolutions and speed etc.
You can also add an opamp circuit on the output to change the voltage range etc.

http://ww1.microchip.com/downloads/en/d ... 21386b.pdf is quite a good explanation.

http://www.national.com/ds/DA/DAC0808.pdf is a bit old now, but shows another interface type.

Have a look at Maplin, RS, Farnell or your favorite supplier to see what they sell. Price and availabilty often dictate what you purchase.

Re: Variable mV output

PostPosted: Tue Dec 12, 2017 5:28 am
by drawynesmith
Kev wrote:Hi,
The component you want is a D/A (digital to analogue convertor)
There are many types with different resolutions and speed etc.
You can also add an opamp circuit on the output to change the voltage range etc.

http://ww1.microchip.com/downloads/en/d ... 21386b.pdf is quite a good explanation.

http://www.national.com/ds/DA/DAC0808.pdf is a bit old now, but shows another interface type.

Have a look at Maplin, RS, Farnell or your favorite supplier to see what they sell. Price and availabilty often dictate what you purchase.

You can use a D/A converter
You can also add an opamp circuit.