kopia lustrzana https://github.com/fhdm-dev/scoppy
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fhdm-dev
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1e8bee4882
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@ -26,8 +26,8 @@ title: Scoppy
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[Analog Front-End](./wiki/Analog-Front-End)
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* Design and build an Analog front-end to your Scoppy Oscilloscope so that you can measure different voltage ranges (ie. different to the 0-3.3V range of the RPI Pico ADC inputs).
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* [FSCOPE-250K](https://store.fhdm.xyz/fscope-500k) analog front end [assembly instructions](wiki/fscope-250k5-v2)
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* [FSCOPE-250K](https://store.fhdm.xyz/fscope-500k) & [DSO-500K](https://store.fhdm.xyz/dso-500k) [usage instructions](wiki/fscope-dso-500k-v2-usage)
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* [FSCOPE-500K](https://store.fhdm.xyz/fscope-500k) analog front end [assembly instructions](wiki/fscope-500k)
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* [FSCOPE-500K](https://store.fhdm.xyz/fscope-500k) & [DSO-500K](https://store.fhdm.xyz/dso-500k) [usage instructions](wiki/fscope-dso-500k-v2-usage)
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[Scoppy on GitHub](https://github.com/fhdm-dev/scoppy)
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* The Scoppy GitHub repository.
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@ -2,88 +2,7 @@
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title: FSCOPE-250K Assembly Instructions
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---
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The [_FSCOPE-250K_](https://store.fhdm.xyz/fscope-250k5) is a 2 channel oscilloscope analog front end for use with the Raspberry Pi Pico or Pico W and the Scoppy Android app.
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### Features and Specifications
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- Input impedance: 1M Ohm / 22pF
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- Four input voltage ranges (sensitivity levels): +-6V, +-2V, +-1V, +-0.5V
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- Compatible with 10X probes
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- Overvoltage protection (tested up to +-20V)
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- Access to all pins of the Raspberry Pi Pico
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- Signals can be input via 0.1" header pins or BNC connectors
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- Built-in low pass filter enables generation of analog signals via PWM
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- AC and DC coupling of the input signals
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<br>
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### Assembly
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You will need to supply:
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- One Raspberry Pi Pico or Pico W
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- 7 pairs of 0.1" male headers (or 6 pairs and 2 compatible BNC connectors)
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- If the Pico is not to be soldered directly to the board (ie. it will be removable) then
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2 sets of 20 0.1" pin headers are also required.
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- 3 jumpers (shunts)
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#### 1. Input Connectors (headers)
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- Solder pairs of 0.1" male headers to each of CH1/GND and CH2/GND (these can be found at the bottom of the board).
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#### 2. AC/DC Coupling pins
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- Find the pairs of holes labeled DC. Solder male headers to these and install a jumper (shunt) to connect the two header pins. When the pins are connected like this the channel is in DC coupling mode. Remove the jumper for AC coupling.
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#### 3. Signal Generator output and low-pass filter
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- Solder headers to the holes labeled 'SIG' (or 'SIG1') at H12 and optionally to the GND hole.
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- Solder headers to the holes at H4.
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#### 4. Trimmer Capacitors
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- Solder the included green trimmer capacitors to C15 and C32. Polarity is not important.
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#### 5. Raspberry PI Pico (or Pico W)
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The Pico can be soldered directly to the board or via headers so that it can be easily removed.
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#### 6. Input Connectors (BNC connectors - optional)
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- The board can also be used with the inexpensive BNC connectors available from sites such as eBay, [Amazon](https://amzn.to/3HhM9zo) or Aliexpress. The footprint can be found in the datasheet [here](https://lcsc.com/product-detail/RF-Connectors-Coaxial-Connectors_dosinconn-DOSIN-801-0038_C709673.html).
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- If using BNC connectors, solder them to BNC CH1 and BNC CH2.
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<br>
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<figure>
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<img src="assets/img/fscope250k5-v2/fscope-250k5-v2-assembled.jpg" alt="fscope assembled"/>
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<figcaption style="text-align:center">Your board may look slightly different to this - depending on the revision</figcaption>
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</figure>
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### Firmware Installation
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Download and install the Scoppy FSCOPE firmware. Instructions are on the [Installation & Getting Started](../wiki/Installation-&-Getting-Started) page.
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The firmware file for the Pico is named scoppy-pico-fscope-250k5-vNN.uf2 and the file for the Pico W is named scoppy-pico-wireless-fscope-250k5-vNN.uf2 (where NN is the version number).
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### Trimmer capacitor adjustment
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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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> __If using the signal generator on the FSCOPE/DSO board ensure the jumper on H4 has been removed!!!__
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Feed a 1kHz square wave into the CH1 input (using jumper wires or 1X probes - do NOT use 10X probes). If the waveform displayed in the app doesn't look square then adjust the trimmer capacitor (C15) until it does. You'll need a small screwdriver to do the adjustment. Screwdrivers like those supplied with oscilloscope probes should work.
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You can use the Scoppy signal generator to generate the 1kHz square wave as follows:
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1. If there is a jumper on H4 then remove that.
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2. Connect the lower SIG pin (DIRECT) on H2 to CH1 with a jumper wire.
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3. You should see a square wave in the Scoppy app. Ensure the volts/div for CH1 is greater than 600mV (input voltage range 0) otherwise the signal might get clipped.
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> See the usage instructions for more information about the signal generator pads on the board.
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Repeat the procedure for CH2 (the trimmer capacitor for CH2 is labeled C32).
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### Using the FSCOPE-250K
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See [Using the FSCOPE-250K and DSO-500K](../wiki/fscope-dso-500k-v2-usage)
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The FSCOPE-250K has changed its name to the FSCOPE-500K. Please see [here](fscope-500k) for the assembly instructions.
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<br>
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{% include see-also.md %}
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@ -0,0 +1,81 @@
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---
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title: FSCOPE-500K Assembly Instructions
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---
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> The FSCOPE-500K was previously known as the FSCOPE-250K. Both boards are exactly the same.
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<br>
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The [_FSCOPE-500K_](https://store.fhdm.xyz/fscope-500k) is a 2 channel oscilloscope analog front end for use with the Raspberry Pi Pico or Pico W and the Scoppy Android app.
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### Assembly
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You will need to supply:
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- One Raspberry Pi Pico or Pico W
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- 7 pairs of 0.1" male headers (or 6 pairs and 2 compatible BNC connectors)
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- If the Pico is not to be soldered directly to the board (ie. it will be removable) then
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2 sets of 20 0.1" pin headers are also required.
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- 3 jumpers (shunts)
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#### 1. Input Connectors (headers)
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- Solder pairs of 0.1" male headers to each of CH1/GND and CH2/GND (these can be found at the bottom of the board).
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#### 2. AC/DC Coupling pins
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- Find the pairs of holes labeled DC. Solder male headers to these and install a jumper (shunt) to connect the two header pins. When the pins are connected like this the channel is in DC coupling mode. Remove the jumper for AC coupling.
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#### 3. Signal Generator output and low-pass filter
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- Solder headers to the holes labeled 'SIG' (or 'SIG1') at H12 and optionally to the GND hole.
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- Solder headers to the holes at H4.
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#### 4. Trimmer Capacitors
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- Solder the included green trimmer capacitors to C15 and C32. Polarity is not important.
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#### 5. Raspberry PI Pico (or Pico W)
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The Pico can be soldered directly to the board or via headers so that it can be easily removed.
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#### 6. Input Connectors (BNC connectors - optional)
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- The board can also be used with the inexpensive BNC connectors available from sites such as eBay, [Amazon](https://amzn.to/3HhM9zo) or Aliexpress. The footprint can be found in the datasheet [here](https://lcsc.com/product-detail/RF-Connectors-Coaxial-Connectors_dosinconn-DOSIN-801-0038_C709673.html).
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- If using BNC connectors, solder them to BNC CH1 and BNC CH2.
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<br>
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<figure>
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<img src="assets/img/fscope250k5-v2/fscope-250k5-v2-assembled.jpg" alt="fscope assembled"/>
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<figcaption style="text-align:center">Your board may look slightly different to this - depending on the revision</figcaption>
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</figure>
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### Firmware Installation
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Download and install the Scoppy FSCOPE firmware. Instructions are on the [Installation & Getting Started](../wiki/Installation-&-Getting-Started) page.
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The firmware file for the Pico is named scoppy-pico-fscope-250k5-vNN.uf2 and the file for the Pico W is named scoppy-pico-wireless-fscope-250k5-vNN.uf2 (where NN is the version number).
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### Trimmer capacitor adjustment
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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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> __If using the signal generator on the FSCOPE/DSO board for the trimmer capacitor adjustment, ensure the jumper on H4 has been removed!!!__
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Feed a 1kHz square wave into the CH1 input (using jumper wires or 1X probes - do NOT use 10X probes). If the waveform displayed in the app doesn't look square then adjust the trimmer capacitor (C15) until it does. You'll need a small screwdriver to do the adjustment. Screwdrivers like those supplied with oscilloscope probes should work.
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You can use the Scoppy signal generator to generate the 1kHz square wave as follows:
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1. If there is a jumper on H4 then remove that.
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2. Connect the lower SIG pin (DIRECT) on H2 to CH1 with a jumper wire.
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3. You should see a square wave in the Scoppy app. Ensure the volts/div for CH1 is greater than 600mV (input voltage range 0) otherwise the signal might get clipped.
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> See the usage instructions for more information about the signal generator pads on the board.
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Repeat the procedure for CH2 (the trimmer capacitor for CH2 is labeled C32).
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### Using the FSCOPE-500K
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See [Using the FSCOPE-500K and DSO-500K](../wiki/fscope-dso-500k-v2-usage)
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<br>
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{% include see-also.md %}
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@ -1,17 +1,19 @@
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---
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title: Using the FSCOPE-250K and DSO-500K
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title: Using the FSCOPE-500K and DSO-500K
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---
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The [_FSCOPE-250K_](https://store.fhdm.xyz/fscope-500k) is a 2 channel oscilloscope analog front end for use with the Raspberry Pi Pico or Pico W and the Scoppy Android app.
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Assembly instructions are [here](fscope-250k5-v2).
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> Note. The FSCOPE-500K was previously known as the FSCOPE-250K. Both boards are exactly the same.
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The [_FSCOPE-500K_](https://store.fhdm.xyz/fscope-500k) is a 2 channel oscilloscope analog front end for use with the Raspberry Pi Pico or Pico W and the Scoppy Android app.
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Assembly instructions are [here](fscope-500k).
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The [_DSO-500K_](https://store.fhdm.xyz/dso-500k) is a fully assembled version of the FSCOPE-250K using a Pico W.
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The [_DSO-500K_](https://store.fhdm.xyz/dso-500k) is a fully assembled version of the FSCOPE-500K using a Pico W.
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### Using the FSCOPE-250K and DSO-500K
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### Using the FSCOPE-500K and DSO-500K
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#### Connecting to your Phone/Tablet
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If you have a DSO-500K or an FSCOPE-250K with a Pico W, then please see [Getting started with Scoppy and the Pico W](./Getting-started-with-the-Pico-W) for instructions on how to establish a wireless connection between the board and the Scoppy app on your phone/tablet.
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If you have a DSO-500K or an FSCOPE-500K with a Pico W, then please see [Getting started with Scoppy and the Pico W](./Getting-started-with-the-Pico-W) for instructions on how to establish a wireless connection between the board and the Scoppy app on your phone/tablet.
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Otherwise, attach the small end of an OTG adapter cable/adapter to the USB input of the Android device (do NOT plug it into the USB socket of the FSCOPE/DSO board) and plug the other end of the adapter into a USB cable. This cable then plugs into the micro-USB connector on the FSCOPE/DSO board.
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@ -19,11 +21,11 @@ Once you open the app and a connection is established between the Pico and the S
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#### Connecting the signal source
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The signal source can be connected to either the header pins labeled CH1 and CH2 or a BNC connector (if fitted). Note that all GND pins/connections are connected together internally.
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The signal source can be connected to either the header pins labeled CH1 and CH2 or a BNC connector (if fitted). Note that all GND pins/connections are connected together internally. For each channel the center of the BNC connector and the corresponding header pin input are also connected internally.
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#### Input voltage ranges
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The FSCOPE-250K and DSO-500K will automatically change the input voltage range (sensitivity) as you adjust the volts/div setting in the app. The best vertical resolution is
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The FSCOPE-500K and DSO-500K will automatically change the input voltage range (sensitivity) as you adjust the volts/div setting in the app. The best vertical resolution is
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obtained by adjusting volts/div so that the trace fills most of the screen vertically (assuming the vertical position is 0). Further increases in volts/div
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may result in the signal being clipped.
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@ -118,7 +120,7 @@ might help.
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> Note. If a jumper is connecting the pins on H4 then the this will affect the output of the signal generator. Remove the jumper before performing the trimmer capacitor adjustment.
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Instructions for adjusting the trimmer capacitors can be found in the [FSCOPE assembly instructions](fscope-250k5-v2.md).
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Instructions for adjusting the trimmer capacitors can be found in the [FSCOPE assembly instructions](fscope-500k).
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## See also
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{% include wifi-links.md %}
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