DAC Manual Input

149

01:46:06

Amp output can be scaled to suit desired range.

published 8 years ago

zorgrian

8 years ago

If you scaled the resistors in powers of 2, then the resultant voltage could represent 256 values.

BillyT

8 years ago

I tried but couldn't get the desired values.

zorgrian

8 years ago

http://everycircuit.com/circuit/5468238573207552

zorgrian

8 years ago

Calculating the values of resistors needed to make a DAC results in odd values that are often not practical, but there’s an elegant solution to this problem. By constructing a R/2R ladder resistor network on the input of the summing circuit, the same kind of binary weighting can be achieved with only two kinds of resistor values! I have only done this for 4 bits but you could continue it to 8 bits. Now you can obtain 16 analogue values from the 4 input switches.

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