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18 lines
589 B
Markdown
18 lines
589 B
Markdown
## Digilent DE0 board
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* Altera EP3C16F484C6 FPGA
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The DAC output is the UART_TX pin. It _really_ needs a 5kHz lowpass filter, otherwise you'll be deafened/greeted by a very loud 10kHz PWM carrier. Try two sections of a 1K ohm series resistor, followed by a 100nF capacitor to ground:
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```
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UART_TX pin ----RRRRR--------RRRRR---------o OUTPUT
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C C
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C C
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C C
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GND GND
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``` |