kopia lustrzana https://github.com/fhdm-dev/scoppy
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title: FSCOPE/DSO-500K Revision 4b and lower
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---
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### Unpopulated holes/pads
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> If you have Rev. 2 of the FSCOPE board please see [FSCOPE-250K-Rev2](fscope-250k-rev2)
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There will be some unpopulated holes/pads on your board. Depending on your board revision these may include:
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_H9, H10_
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<br>
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These are tiny prototyping areas. One hole is connected to GND. The others are not connected to anything.
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_R32, R33_
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<br>
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Extra current limiting resistors for the Wi-Fi and Trigger LEDS. Add resistors here (and possibly remove R30/R31) to adjust
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LED brightness.
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_SWCLK, SWDIO_
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<br>
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Debug headers
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_H11_
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<br>
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Not used
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_+3.3V, VSYS_
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<br>
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Test points
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_-2.5V_
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<br>
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Test point for the -2.5V rail. Do not draw current from this rail as it will adversely affect the performance
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of the oscilloscope.
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_H17, RESTART_
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<br>
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Shorting these will restart the Pico (W). A momentary switch could be soldered to these holes/pads to make it easier to restart
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the oscilloscope.
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_H7, H15, R35, R36_
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<br>
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For connecting external Wi-Fi and Trigger LEDS if the board is to be enclosed in a case.
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_H16, R32_
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<br>
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For connecting an external status LED if the board is to be enclosed in a case (no firmware support for this as yet).
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## See also
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{% include wifi-links.md %}
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<br>
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{% include scoppy-links.md %}
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@ -67,26 +67,11 @@ See [here](fscope-dso-500k-dimensions)
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#### Unpopulated holes/pads
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> If you have Rev. 2 of the FSCOPE board please see [FSCOPE-250K-Rev2](fscope-250k-rev2)
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<br>
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> If you have Rev 4, 4a or 4b please see [FSCOPE-500K 4b](fscope-dso-500k-4b-unpopulated)
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There will be some unpopulated holes/pads on your board. Depending on your board revision these may include:
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_H9, H10_
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<br>
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These are tiny prototyping areas. One hole is connected to GND. The others are not connected to anything.
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_R32, R33_
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<br>
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Extra current limiting resistors for the Wi-Fi and Trigger LEDS. Add resistors here (and possibly remove R30/R31) to adjust
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LED brightness.
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_SWCLK, SWDIO_
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<br>
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Debug headers
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_H11_
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<br>
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Not used
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_+3.3V, VSYS_
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<br>
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Test points
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@ -96,19 +81,19 @@ _-2.5V_
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Test point for the -2.5V rail. Do not draw current from this rail as it will adversely affect the performance
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of the oscilloscope.
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_H17, RESTART_
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_H17_
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<br>
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Shorting these will restart the Pico (W). A momentary switch could be soldered to these holes/pads to make it easier to restart
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the oscilloscope.
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Restart/Reset. Shorting these will restart the DSO-500K. A momentary switch could be soldered to these holes/pads to make it easier to restart the oscilloscope. Double clicking the switch will cause the Pico W on the DSO-500K to enter USB mass storage mode.
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_H7, H15, R35, R36_
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_H7, H15_
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<br>
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For connecting external Wi-Fi and Trigger LEDS if the board is to be enclosed in a case.
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_H16, R32_
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_H9, R32_
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<br>
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For connecting an external status LED if the board is to be enclosed in a case (no firmware support for this as yet).
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#### Miscellaneous
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The holes at the corners of the board are 3.3mm (130 mil).
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