Jeff Epler
4715875cc4
.. leading zeros are required for `frontmatter` to treat them as dates
rather than strings, apparently per the YAML specification.
This was done by script:
```py
import re
import datetime
import pathlib
import sys
import frontmatter
rx = re.compile(r'^(\s*)date_added:.*$', re.M)
for path_str in sys.argv[1:]:
print(path_str)
path = pathlib.Path(path_str)
post = frontmatter.load(path)
date_added = post.get("date_added", "")
if isinstance(date_added, datetime.date):
continue
if isinstance(date_added, str):
try:
date_added = datetime.datetime.strptime(date_added, "%Y-%m-%d")
except ValueError as exc:
print(f"Failed to parse date {date_added} in {path_str}: {exc}")
continue
date_added = date_added.date()
content = path.read_text("utf-8")
new_content = rx.sub(lambda m: f"{m.group(1)}date_added: {date_added}", content)
assert content != new_content
path.write_text(new_content, "utf-8")
```
2.2 KiB
2.2 KiB
| layout | board_id | title | name | manufacturer | board_url | board_image | date_added | family | features | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| download | datanoise_picoadk | PicoADK - Audio Development Kit Download | PicoADK - Audio Development Kit | DatanoiseTV |
|
datanoise_picoadk.jpg | 2023-07-28 | raspberrypi |
|
The PicoADK is a RP2040 based Audio Development Kit, which allows you to build your own digital oscillators, synthesizers, noise boxes and experiment around. It has all the base features of the Raspberry Pico / RP2040, plus a high quality Audio Output, 8 Analog Inputs for connecting potentiometers, control voltage from Eurorack systems or even additional input signals.
Why did you make it?
I made it initially for myself to build digital oscillators for a hybrid synth and to experiment with the RP2040 as a DSP.
What makes it special?
It has a 32-bit Audio Codec and an SPI 8x 12-bit ADC and is only longer by 4 pins on each side than the Raspberry Pico!
Specifications
- RP2040 Dual Core 133MHz Cortex M0+ (running at 2x 400MHz Overclocked in the RTOS Template)
- 2MB Flash (plenty for synthesizers and sound generators)
- Very low noise LDO regulators (separate LDO for digital circuits and separate for analog circuits)
- No switching regulators
- Pin-compatible with RP2040 (besides a few pins internally used or rearranged)
- PCM5100A 32-bit, up to 384KHz I2S Audio Codec
- Dedicated Boot and Reset Buttons
- 8 channel 12-bit ADC with up to 1MS/s, with selectable 3.3V range (on-board low-noise power supply) or range up to 5V via external VREF
- Low-Pass filter on each ADC input (fMax=48 KHz) at low-impedance (100 Ohm). With 5V VREF suitable for CV (no overvoltage protection, unipolar)
- Series resistors on ADC SPI to improve signal integrity and reduce crosstalk
- Symbols marking special pin functions on the pin headers
- 4 LEDs on shared GPIO2-5 for debugging
- GPIO15 is hard-wired to a LED
- ESD Protection on USB
- SWD Debug Port