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A voltage reference board providing 5.0V, 2.5V, and 1.25V using the REF5050AI and LM4040. It should work with other REF50xxAI voltage references. the theoretical accuracy of the voltages are:
| Voltage | Accuracy |
|---|---|
| 5V | 0.1% |
| 2.5V | 0.5% |
| 1.25V | 0.7% |
This was the first PCB I made so it's obviously not perfect.
The LM4040 part was an after thought. It would've been better to divide the voltage from the REF5050 itself and have the switch be for that, but whatever.
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