DickCappels
- Joined Aug 21, 2008
- 10,170
I just ordered a 2.5V/ 5V/ 7.5V/ 10V voltage reference from one of those mysterious vendors based in Hong Kong. It is based on the AD584 and is offered at less than US$4 including shipping. Its outputs are to be measured on a presumably calibrated six digit Agilent meter and recorded.
It should be interesting to test.
http://www.ebay.com/itm/131740362946
There are others offered on eBay, apparently from different suppliers.
The problem of getting an output below 2 volts can be solved with a precision voltage divider.
Example:
Make a 2:1 divider, connect it to a power supply, and measure the output (maybe be measured against a reference voltage so a low scale can be used to increase resolution). Note the reading and then swap the two resistors. Change one resistor and try again until you have an acceptably small difference when swapping resistors or you run out of new resistors.
It should be interesting to test.
http://www.ebay.com/itm/131740362946
There are others offered on eBay, apparently from different suppliers.
The problem of getting an output below 2 volts can be solved with a precision voltage divider.
Example:
Make a 2:1 divider, connect it to a power supply, and measure the output (maybe be measured against a reference voltage so a low scale can be used to increase resolution). Note the reading and then swap the two resistors. Change one resistor and try again until you have an acceptably small difference when swapping resistors or you run out of new resistors.