Cap EEG kit

Cap EEG kit

Enclosure for eBUS Adapter Shield v5

Enclosure for eBUS Adapter Shield v5


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Build your very own oscilloscope with the FSCOPE-500K Oscilloscope Kit. The kit includes everything you need to build a 500kS/s dual channel* oscilloscope.

The oscilloscope connects to your Android device and displays the waveform data using the highly rated Scoppy Android app (connection to the Android device is via Wi-Fi or USB).

Our kit includes the FSCOPE-500K oscilloscope board, a Rasperry Pi Pico W, trimmer capacitors, pin headers and sockets, jumpers and plastic feet.

Please note that oscillscope probes are not included but dupont wires can be used instead.

Features and Specifications

  • Up to 500kS/s sample rate (250kS/s with both channels enabled)
  • Maximum analog bandwidth: 150kHz
  • Record length: 2048 samples per channel in RUN mode, 100kS total for single shot captures
  • Input Impedance: 1MΩ / 22pF
  • Maximum Input voltage range: +/- 6V (1X probes), +/- 20V (10X probes)
  • Coupling: AC/DC
  • Connectivity: USB, Wi-Fi
  • Display Modes: YT, FFT, FFT+YT, X-Y, X-Y+YT
  • Trigger Types: Rising edge/falling edge
  • Trigger Modes: Auto/Normal (Run Mode + Single captures)
  • Cursors: YT and FFT horizontal and vertical cursors
  • On-screen measurements: Vmin, Vmax, Vpp, Frequency, Period, Duty
  • Snapshot measurements (screen or sample record): Mean, DC RMS, AC RMS
  • Export data format: CSV
  • Access to all pins of the Raspberry Pi Pico W
  • Signals can be input via 0.1” header pins using dupont wires or BNC connectors using oscilloscope probes (not included)
  • Signal generator - square wave  up to 1.25MHz, sine wave - 1kHz
  • AC and DC coupling of the input signals
  • Indicator LEDs: Status, Wi-Fi and Trigger
  • FFT Window functions: Hann, Hamming, Blackman, Rectangle
  • FFT Vertical units: dBm, dBmV, V
  • Logic Analyser: 25MS/s (requires soldering extra headers to the board - not supplied). No protocol decoding as yet.
  • See the Scoppy project on GitHub for the features of the Scoppy oscilloscope firmware and Android app


More Information

FSCOPE-500K assembly instructions

FSCOPE-500K opeating instructions

Scoppy Android app help

What You'll Need

  • An Android device that's running Android version 6.0 (Marshmallow) or higher. The device must also support USB OTG (On-The-Go) - most modern phones/tablets do. If you are able to install the Scoppy app from the Play Store then (according to Google) it does support USB OTG.
  • An OTG cable/adapter (not supplied). Even if you are planning to use Wi-Fi, we recommend having a OTG (On-The-Go) cable so you can access the firmware settings in the event you can't connect via Wi-Fi (eg. if your Wi-Fi password changes or the Wi-Fi settings in the firmware were entered incorrectly). The OTG adapter plugs into the USB port of your Android device.


Please Note*

  • Use of the second channel requires the premium version of the Scoppy Android app (approx US$3 in-app purchase)
  • Oscillscope probes are not included but dupont wires can be used instead.
  • Some assembly (soldering) is required





The FSCOPE-500K supports AUTO and NORMAL trigger modes and RISING EDGE and FALLING EDGE trigger types. The trigger level is set either by dragging the trigger indicator, tapping the trigger level buttons or tapping the trigger badge at the bottom of the screen. Long-pressing the LEVEL button will set the trigger level to the center of the displayed waveform.


Horizontal and vertical cursors are available in both YT (ie. normal oscilloscope) and FFT modes. In YT mode, the horizontal (X) cursor measurements include position, period and frequency. Vertical (Y) cursor measurements include the voltage and the delta between the two cursors.



Note: Android device and probes are NOT included

  • Window functions: Hann, Hamming, Blackman, Rectangle
  • Vertical units: dBm, dBmV, V
  • Separate adjustments for start/stop frequency, center, span and vertical scale and position
  • Tap and hold the SPAN, CENTER, SCALE and POSITION buttons to set these to their default values
  • The FFT and YT views can be displayed simultaneously


X-Y Mode


Note: Android device and probes are NOT included

Standard X-Y mode as found on most oscilloscopes. Also includes a LINES option to join all samples points with lines instead of displaying individual dots. This can make the output look much nicer for some signals.

The X-Y mode view can be displayed simultaneously with the YT waveforms.

Roll Mode

Note: Android device and probes are NOT included

Displays the waveform data as it is captured instead of waiting for the complete waveform record. Roll mode is used when the sample rate drops below 1kS/s.

Tapping the ROLL button will enter roll mode and set the Time/Div to 1s/div. Tapping it again will leave roll mode and set the Time/Div back to its previous value.

Single shot captures

Pressing the SINGLE button will capture a single waveform record of up to 100k samples. Can be used with either AUTO triggering (to capture the waveform immediately) or NORMAL triggering (to capture the waveform after a trigger event occurs).

8-channel Logic Analyzer

Headers can be soldered to the board to access the Logic Analyzer inputs. The logic analyzer sample rate is 25MS/s and the maximum voltage is 3.3V.

Protocol decoding is not available but the waveform record can be saved and imported into other software (eg. sigrok/pulseview).

AC/DC Coupling

Removing the jumpers from the DC coupling pins will enable AC coupling.


On screen measurements include Vmin, Vmax, Vpp, Frequency, Time (Period) and Duty Cycle for each channel. Tapping the measurements will open the configuration screen. The configuration screen can also be accessed via the channel badges.

Measurements can be displayed for a single waveform (snapshot). These snapshot measurements can encompass the entire sample record or just those samples displayed on the screen. The measurements available include Vmin, Vmax, Vpp, Vmean, Vdc-rms, Vac-rms, Frequency, Period and Duty Cycle. The snapshot measurements can be displayed by long-pressing the on-screen measurements or via the channel badges.

Signal generator

The signal generator can produce square waves of between 10Hz and 1MHz or a PWM encoded sine wave of 1kHz. The PWM encoded sine wave can be converted to an analog sine wave using the onboard low pass filter.

Open Source Hardware

The hardware is open source and of course you can install your own firmware onto your Pico or Pico W board (however, if you do this you are on your own as we can't provide support for custom firmware).


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