Hi all,
The LM338 is a relatively standard 5 amp adjustable linear regulator.
It has three pins. Vin, Vout and Adj. The Adj pin simply connects to two resistors, the value of which determines the output voltage.
This is all pretty standard but I was wanting to build an 8 bit interface to control the voltage through a picaxe.
Any thoughts on a circuit diagram that would allow this?
The datasheet to the LM338 is here
http://www.datasheetcatalog.org/datasheets/400/63928_DS.pdf
Here are my thoughts but if you think I am tackling this the wrong way, I am very open to ideas.
I was thinking of using a DS1666 which is essentially designed to be an audio digital potentiometer. It is Log, not linear. I could then control the resistor value through the picaxe.
The LM338 is a relatively standard 5 amp adjustable linear regulator.
It has three pins. Vin, Vout and Adj. The Adj pin simply connects to two resistors, the value of which determines the output voltage.
This is all pretty standard but I was wanting to build an 8 bit interface to control the voltage through a picaxe.
Any thoughts on a circuit diagram that would allow this?
The datasheet to the LM338 is here
http://www.datasheetcatalog.org/datasheets/400/63928_DS.pdf
Here are my thoughts but if you think I am tackling this the wrong way, I am very open to ideas.
I was thinking of using a DS1666 which is essentially designed to be an audio digital potentiometer. It is Log, not linear. I could then control the resistor value through the picaxe.