Documentation

.github/workflows/TestCompile.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@master
 
 #      - name: Checkout custom library
-#        uses: actions/checkout@v2
+#        uses: actions/checkout@v3
 #        with:
 #          repository: ArminJo/Arduino-BlueDisplay
 #          ref: master
@@ -26,6 +26,6 @@ jobs:
       - name: Compile all examples
         uses: ArminJo/arduino-test-compile@master
         with:
-          sketch-names: SimpleTouchScreenDSO.cpp
+          sketch-names: SimpleDSO.cpp
           build-properties: '{ "All": "-DUSE_SIMPLE_SERIAL" }'
           required-libraries: BlueDisplay

FrequencyGeneratorPage.h

@@ -5,7 +5,6 @@
  *  Email: [email protected]
  *  License: GPL v3 (http://www.gnu.org/licenses/gpl.html)
  */
-
 #ifndef _FREQUENCY_GENERATOR_PAGE_H
 #define _FREQUENCY_GENERATOR_PAGE_H
 
@@ -29,4 +28,3 @@ void stopFrequencyGeneratorPage(void);
 extern const char StringStop[] PROGMEM; // "Stop"
 
 #endif // _FREQUENCY_GENERATOR_PAGE_H
-#pragma once

FrequencyGeneratorPage.cpp → FrequencyGeneratorPage.hpp

@@ -1,5 +1,5 @@
 /*
- * FrequencyGeneratorPage.cpp
+ * FrequencyGeneratorPage.hpp
  *
  * Frequency output from 119 mHz (8.388 second) to 8 MHz square wave on Arduino using timer1.
  * Sine waveform output from 7,421 mHz to 7812.5 Hz
@@ -11,12 +11,12 @@
  * Waveform frequency is not stable and decreased, since not all TIMER1 OVERFLOW interrupts are handled.
  *
  * PWM RC-Filter suggestions
- * Simple: 2k2 Ohm and 100 nF
- * 2nd order (good for sine and triangle): 1 kOhm and 100 nF -> 4k7 Ohm and 22 nF
- * 2nd order (better for sawtooth):        1 kOhm and 22 nF  -> 4k7 Ohm and 4.7 nF
+ * Simple: 2.2 kOhm and 100 nF
+ * 2nd order (good for sine and triangle): 1 kOhm and 100 nF -> 4.7 kOhm and 22 nF
+ * 2nd order (better for sawtooth):        1 kOhm and 22 nF  -> 4.7 kOhm and 4.7 nF
  *
  *
- *  Copyright (C) 2015  Armin Joachimsmeyer
+ *  Copyright (C) 2015-2022  Armin Joachimsmeyer
  *  Email: [email protected]
  *
  *  This file is part of Arduino-Simple-DSO https://github.com/ArminJo/Arduino-Simple-DSO.
@@ -35,12 +35,12 @@
  *  along with this program. If not, see <http://www.gnu.org/licenses/gpl.html>.
  *
  */
+#ifndef _FREQUENCY_GENERATOR_PAGE_HPP
+#define _FREQUENCY_GENERATOR_PAGE_HPP
 
 #if defined(AVR)
 #include "FrequencyGeneratorPage.h"
-#define SUPPRESS_HPP_WARNING
-#include "BlueDisplay.h"
-#include "SimpleTouchScreenDSO.h"
+//#include "SimpleTouchScreenDSO.h"
 
 #include <stdlib.h> // for dtostrf
 
@@ -92,15 +92,14 @@ const char StringMHz[] PROGMEM = "MHz";
 const char* RangeButtonStrings[5] = {StringmHz, StringHz, String10Hz, StringkHz, StringMHz};
 #else
 const uint16_t FixedFrequencyButtonCaptions[NUMBER_OF_FIXED_FREQUENCY_BUTTONS] = { 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 };
-const char* const RangeButtonStrings[5] = { "mHz", "Hz", "10Hz", "kHz", "MHz" };
+const char *const RangeButtonStrings[5] = { "mHz", "Hz", "10Hz", "kHz", "MHz" };
 const char FrequencyFactorChars[4] = { 'm', ' ', 'k', 'M' };
 struct FrequencyInfoStruct sFrequencyInfo;
 
 #endif
 #define INDEX_OF_10HZ 2
 static bool is10HzRange = true;
 
-
 static const int BUTTON_INDEX_SELECTED_INITIAL = 2; // select 10Hz Button
 
 /*
@@ -124,7 +123,7 @@ BDButton TouchButton100;
 BDButton TouchButton200;
 BDButton TouchButton500;
 BDButton TouchButton1k;
-BDButton * const TouchButtonFixedFrequency[] = { &TouchButton1, &TouchButton2, &TouchButton5, &TouchButton10, &TouchButton20,
+BDButton *const TouchButtonFixedFrequency[] = { &TouchButton1, &TouchButton2, &TouchButton5, &TouchButton10, &TouchButton20,
         &TouchButton50, &TouchButton100, &TouchButton200, &TouchButton500, &TouchButton1k };
 #else
 BDButton TouchButtonFirstFixedFrequency;
@@ -136,19 +135,18 @@ void initFrequencyGeneratorPageGui(void);
 
 void doFrequencySlider(BDSlider *aTheTouchedSlider, uint16_t aValue);
 
-void doWaveformMode(BDButton * aTheTouchedButton, int16_t aValue);
-void doSetFixedFrequency(BDButton * aTheTouchedButton, int16_t aValue);
-void doSetFrequencyRange(BDButton * aTheTouchedButton, int16_t aValue);
-void doFrequencyGeneratorStartStop(BDButton * aTheTouchedButton, int16_t aValue);
-void doGetFrequency(BDButton * aTheTouchedButton, int16_t aValue);
+void doWaveformMode(BDButton *aTheTouchedButton, int16_t aValue);
+void doSetFixedFrequency(BDButton *aTheTouchedButton, int16_t aValue);
+void doSetFrequencyRange(BDButton *aTheTouchedButton, int16_t aValue);
+void doFrequencyGeneratorStartStop(BDButton *aTheTouchedButton, int16_t aValue);
+void doGetFrequency(BDButton *aTheTouchedButton, int16_t aValue);
 
 bool setWaveformFrequencyAndPrintValues();
 
 void printFrequencyAndPeriod();
 #if defined(AVR)
 void setWaveformButtonCaption(void);
 void initTimer1ForCTC(void);
-#else
 #endif
 
 /***********************
@@ -206,7 +204,7 @@ void loopFrequencyGeneratorPage(void) {
 }
 
 void stopFrequencyGeneratorPage(void) {
-#if defined(LOCAL_DISPLAY_EXISTS)
+#if defined(BD_DRAW_TO_LOCAL_DISPLAY_TOO)
     // free buttons
     for (unsigned int i = 0; i < NUMBER_OF_FIXED_FREQUENCY_BUTTONS; ++i) {
         TouchButtonFixedFrequency[i]->deinit();
@@ -218,7 +216,9 @@ void stopFrequencyGeneratorPage(void) {
     TouchButtonFrequencyStartStop.deinit();
     TouchButtonGetFrequency.deinit();
     TouchSliderFrequency.deinit();
+#  if defined(AVR)
     TouchButtonWaveform.deinit();
+#  endif
 #endif
     /*
      * restore previous state
@@ -249,12 +249,10 @@ void initFrequencyGeneratorPageGui() {
 #endif
 
 #if defined(LOCAL_DISPLAY_EXISTS)
-        TouchButtonFixedFrequency[i]->init(tXPos,
-                REMOTE_DISPLAY_HEIGHT - BUTTON_HEIGHT_4 - BUTTON_HEIGHT_5 - BUTTON_HEIGHT_6 - 2 * BUTTON_DEFAULT_SPACING,
-                BUTTON_WIDTH_10, BUTTON_HEIGHT_6, COLOR16_BLUE, sStringBuffer, TEXT_SIZE_11, 0, tFrequency, &doSetFixedFrequency);
+        TouchButtonFixedFrequency[i]->init(tXPos, 96, BUTTON_WIDTH_10, BUTTON_HEIGHT_6, COLOR16_BLUE, sStringBuffer, TEXT_SIZE_11,
+                0, tFrequency, &doSetFixedFrequency);
 #else
-        TouchButtonFirstFixedFrequency.init(tXPos,
-                REMOTE_DISPLAY_HEIGHT - BUTTON_HEIGHT_4 - BUTTON_HEIGHT_5 - BUTTON_HEIGHT_6 - 2 * BUTTON_DEFAULT_SPACING,
+        TouchButtonFirstFixedFrequency.init(tXPos, 92,
                 BUTTON_WIDTH_10, BUTTON_HEIGHT_6, COLOR16_BLUE, sStringBuffer, TEXT_SIZE_11, 0, tFrequency, &doSetFixedFrequency);
 #endif
 
@@ -276,16 +274,17 @@ void initFrequencyGeneratorPageGui() {
             tButtonColor = BUTTON_AUTO_RED_GREEN_TRUE_COLOR;
         }
         TouchButtonFrequencyRanges[i].init(tXPos, tYPos, BUTTON_WIDTH_5 + BUTTON_DEFAULT_SPACING_HALF,
-        BUTTON_HEIGHT_5, tButtonColor, reinterpret_cast<const __FlashStringHelper *>(RangeButtonStrings[i]), TEXT_SIZE_22, FLAG_BUTTON_DO_BEEP_ON_TOUCH, i, &doSetFrequencyRange);
+        BUTTON_HEIGHT_5, tButtonColor, reinterpret_cast<const __FlashStringHelper*>(RangeButtonStrings[i]), TEXT_SIZE_22,
+                FLAG_BUTTON_DO_BEEP_ON_TOUCH, i, &doSetFrequencyRange);
 
         tXPos += BUTTON_WIDTH_5 + BUTTON_DEFAULT_SPACING - 2;
     }
 
     ActiveTouchButtonFrequencyRange = TouchButtonFrequencyRanges[BUTTON_INDEX_SELECTED_INITIAL];
 
-    TouchButtonFrequencyStartStop.init(0, REMOTE_DISPLAY_HEIGHT - BUTTON_HEIGHT_4, BUTTON_WIDTH_3, BUTTON_HEIGHT_4, 0,
-            F("Start"), TEXT_SIZE_26, FLAG_BUTTON_DO_BEEP_ON_TOUCH | FLAG_BUTTON_TYPE_TOGGLE_RED_GREEN,
-            sFrequencyInfo.isOutputEnabled, &doFrequencyGeneratorStartStop);
+    TouchButtonFrequencyStartStop.init(0, REMOTE_DISPLAY_HEIGHT - BUTTON_HEIGHT_4, BUTTON_WIDTH_3, BUTTON_HEIGHT_4, 0, F("Start"),
+            TEXT_SIZE_26, FLAG_BUTTON_DO_BEEP_ON_TOUCH | FLAG_BUTTON_TYPE_TOGGLE_RED_GREEN, sFrequencyInfo.isOutputEnabled,
+            &doFrequencyGeneratorStartStop);
     TouchButtonFrequencyStartStop.setCaptionForValueTrue(F("Stop"));
 
     TouchButtonGetFrequency.init(BUTTON_WIDTH_3_POS_2, REMOTE_DISPLAY_HEIGHT - BUTTON_HEIGHT_4, BUTTON_WIDTH_3,
@@ -309,9 +308,8 @@ void drawFrequencyGeneratorPage(void) {
 #endif
     TouchSliderFrequency.drawSlider();
 
-
     BlueDisplay1.drawText(TEXT_SIZE_11_WIDTH, FREQ_SLIDER_Y + 3 * FREQ_SLIDER_SIZE + TEXT_SIZE_11_HEIGHT, F("1"),
-            TEXT_SIZE_11, COLOR16_BLUE, COLOR_BACKGROUND_FREQ);
+    TEXT_SIZE_11, COLOR16_BLUE, COLOR_BACKGROUND_FREQ);
 #if defined(AVR)
     BlueDisplay1.drawText(REMOTE_DISPLAY_WIDTH - 5 * TEXT_SIZE_11_WIDTH,
             FREQ_SLIDER_Y + 3 * FREQ_SLIDER_SIZE + TEXT_SIZE_11_HEIGHT, F("1000"), TEXT_SIZE_11, COLOR16_BLUE,
@@ -350,7 +348,9 @@ void drawFrequencyGeneratorPage(void) {
 
     TouchButtonFrequencyStartStop.drawButton();
     TouchButtonGetFrequency.drawButton();
+#if defined(AVR)
     TouchButtonWaveform.drawButton();
+#endif
 
     // show values
     printFrequencyAndPeriod();
@@ -395,7 +395,7 @@ void setWaveformButtonCaption(void) {
 }
 #endif
 
-void doWaveformMode(BDButton * aTheTouchedButton, int16_t aValue) {
+void doWaveformMode(BDButton *aTheTouchedButton, int16_t aValue) {
 #if defined(AVR)
     cycleWaveformMode();
     setWaveformButtonCaption();
@@ -405,7 +405,7 @@ void doWaveformMode(BDButton * aTheTouchedButton, int16_t aValue) {
 /**
  * Set frequency to fixed value 1,2,5,10...,1000
  */
-void doSetFixedFrequency(BDButton * aTheTouchedButton, int16_t aValue) {
+void doSetFixedFrequency(BDButton *aTheTouchedButton, int16_t aValue) {
     setFrequencyNormalizedForGUI(aValue);
     bool tErrorOrClippingHappend = setWaveformFrequencyAndPrintValues();
 #if defined(LOCAL_DISPLAY_EXISTS)
@@ -419,7 +419,7 @@ void doSetFixedFrequency(BDButton * aTheTouchedButton, int16_t aValue) {
  * sets the unit (mHz - MHz)
  * set color for old and new button
  */
-void doSetFrequencyRange(BDButton * aTheTouchedButton, int16_t aValue) {
+void doSetFrequencyRange(BDButton *aTheTouchedButton, int16_t aValue) {
 
     if (ActiveTouchButtonFrequencyRange != *aTheTouchedButton) {
         // Handling of 10 Hz button
@@ -451,7 +451,7 @@ void doSetFrequencyRange(BDButton * aTheTouchedButton, int16_t aValue) {
  * @param aTheTouchedButton
  * @param aValue
  */
-void doGetFrequency(BDButton * aTheTouchedButton, int16_t aValue) {
+void doGetFrequency(BDButton *aTheTouchedButton, int16_t aValue) {
     TouchSliderFrequency.deactivate();
     float tNumber = getNumberFromNumberPad(NUMBERPAD_DEFAULT_X, 0, COLOR16_BLUE);
 // check for cancel
@@ -479,7 +479,7 @@ void doGetFrequency(BDButton * aTheTouchedButton, int16_t aValue) {
 }
 #endif
 
-void doFrequencyGeneratorStartStop(BDButton * aTheTouchedButton, int16_t aValue) {
+void doFrequencyGeneratorStartStop(BDButton *aTheTouchedButton, int16_t aValue) {
     sFrequencyInfo.isOutputEnabled = aValue;
     if (aValue) {
         // Start timer
@@ -622,17 +622,17 @@ bool setWaveformFrequency(float aValue) {
             tDividerInt = 2;
         }
 
-#if defined(STM)32F30X
+#  if defined(STM32F30X)
         Synth_Timer32_SetReloadValue(tDividerInt);
-#else
+#  else
         uint32_t tPrescalerValue = (tDividerInt >> 16) + 1; // +1 since at least divider by 1
         if (tPrescalerValue > 1) {
             //we have prescaler > 1 -> adjust reload value to be less than 0x10001
             tDividerInt /= tPrescalerValue;
         }
         Synth_Timer16_SetReloadValue(tDividerInt, tPrescalerValue);
         tDividerInt *= tPrescalerValue;
-#endif
+#  endif
         sFrequencyInfo.ControlValue.DividerInt = tDividerInt;
         // recompute frequency
         sFrequencyInfo.Frequency = 36000000 / tDividerInt;
@@ -651,5 +651,6 @@ bool setWaveformFrequency() {
 float getPeriodMicros() {
     return sFrequencyInfo.ControlValue.DividerInt / 36.0f;
 }
-#endif
+#endif // !defined(AVR)
 
+#endif // _FREQUENCY_GENERATOR_PAGE_HPP

README.md

@@ -32,7 +32,7 @@ You can load the library with *Tools -> Manage Libraries...* or *Ctrl+Shift+I*.
   - no attenuator (pin 8+9 left open).
   - passive attenuator with /1, /10, /100 attenuation (pin 8 connected to ground).
   - active attenuator (pin 9 connected to ground) - still experimental.
-- Using 1.1 volt internal reference. 5 volt (VCC) is also selectable and is useful if no attenuator is attached.
+- Using 1.1 volt internal reference. 5 V (VCC) is also selectable and is useful if no attenuator is attached.
 
 - Integrated frequency generator using 16 bit Timer1. Frequency from 119 mHz (8.388 second) to 8 MHz
 - Integrated PWM Waveform generator for sinus, triangle and sawtooth using 16 bit Timer1. Frequency from 1.9 mHz to 7.8 kHz
@@ -41,11 +41,11 @@ You can load the library with *Tools -> Manage Libraries...* or *Ctrl+Shift+I*.
 1. Arduino Nano
 2. Breadboard 400 points
 3. Resistors
-   - Resistors for the simple (0-5 volt) version: 1x 10 kOhm, 2x 100 k, 1x 4 M or more.
-   - Resistors for the 3 range (0-110 volt) version: 1x 2.2 kOhm, 2x 10 k, 3x 100 k, 2x 220 k, 2x 1 M, 1x 4 M or greater
+   - Resistors for the simple (0-5 V) version: 1x 10 kΩ, 2x 100 k, 1x 4 M or more.
+   - Resistors for the 3 range (0-110 V) version: 1x 2.2 kΩ, 2x 10 k, 3x 100 k, 2x 220 k, 2x 1 M, 1x 4 M or greater
 4. Capacitors
-   - Capacitors for the simple version: 1x 100 nF / 10 volt (or more)
-   - Capacitors for the 3 range (0-110 volt) version: 4x 100 nF / 100 volt (or more), 6.8 uF
+   - Capacitors for the simple version: 1x 100 nF / 10 V (or more)
+   - Capacitors for the 3 range (0-110 V) version: 4x 100 nF / 100 V (or more), 6.8 µF
 5. Jumper wires
 
 Optional for Bluetooth connection
@@ -111,7 +111,7 @@ The stack size is required for testing different buffer size values during devel
 - **History** -> **red** history off, **green** history on, i.e. old chart data is not deleted, it stays as a light green trace. This button is also available (invisible) at the chart page.
 - Slope - **Slope A** -> trigger on ascending slope, **Slope D** -> trigger on descending slope.
 - **Back** -> Back to chart page.
-- **Trigger delay** -> Trigger delay can be numerical specified from 4 µs to 64.000.000 µs (64 seconds, if you really want). Microseconds resolution is used for values below 64.000.
+- **Trigger delay** -> Trigger delay can be numerical specified from 4 µs to 64.000.000 µs (64 seconds, if you really want). Microseconds resolution is used for values below 64.000.
 - Trigger - the trigger value can be set on the chart page by touching the light violet vertical bar in the 4. left grid.
   - **Trigger auto** -> let the DSO compute the trigger value using the average of the last measurement.
   - **Trigger man timeout** -> use manual trigger value, but with timeout, i.e. if trigger condition not met, new data is shown after timeout.
@@ -121,7 +121,7 @@ The stack size is required for testing different buffer size values during devel
   -**Trigger ext** uses pin 2 as external trigger source.
 
 - Input selector
-  - **%1**   -> Pin A0 with no attenuator, only a 10k Ohm protection resistor.
+  - **%1**   -> Pin A0 with no attenuator, only a 10 kΩ protection resistor.
   - **%10**  -> Pin A1 with an 1 to 10 attenuator.
   - **%100** -> Pin A2 with an 1 to 100 attenuator.
   - **CH 3** -> sequences through the channels **CH 4**, **Temp** (internal temperature sensor), **VRef** (internal reference).
@@ -147,36 +147,34 @@ Short touch switches info output, long touch shows active GUI elements.
 
 |Maximum values                                                      | Minimum values|
 | :--- | :--- |
-|SINE: clip to minimum 8 samples per period => 128 µs / 7812.5 Hz       |7,421 mHz|
-|SAWTOOTH: clip to minimum 16 samples per period => 256 µs / 3906.25 Hz |3.725 mHz|
-|TRIANGLE: clip to minimum 32 samples per period => 512 µs / 1953.125 Hz|1.866 mHz|
+|SINE: clip to minimum 8 samples per period => 128 µs / 7812.5 Hz       |7,421 mHz|
+|SAWTOOTH: clip to minimum 16 samples per period => 256 µs / 3906.25 Hz |3.725 mHz|
+|TRIANGLE: clip to minimum 32 samples per period => 512 µs / 1953.125 Hz|1.866 mHz|
 
 ### RC-Filter suggestions
-- Simple: 2k2 Ohm and 100 nF
-- 2nd order (good for sine and triangle): 1 kOhm and 100 nF -> 4k7 Ohm and 22 nF
-- 2nd order (better for sawtooth):        1 kOhm and 22 nF  -> 4k7 Ohm and 4.7 nF
+- Simple: 2.2 kΩ and 100 nF
+- 2nd order (good for sine and triangle): 1 kΩ and 100 nF -> 4.7 kΩ and 22 nF
+- 2nd order (better for sawtooth):        1 kΩ and 22 nF  -> 4.7 kΩ and 4.7 nF
 
 **Do not run DSO acquisition and non square wave waveform generation at the same time.**
 Because of the interrupts at 62 kHz rate, DSO is almost not usable during non square wave waveform generation
 and waveform frequency is not stable and decreased, since not all TIMER1 OVERFLOW interrupts are handled.
 
 # SCREENSHOTS
-DSO start screen
-![DSO start screen](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Welcome.jpg)
-
-| DSO Chart screen | DSO Chart screen with long info |
+| DSO start screen | DSO at work |
 | :-: | :-: |
+| ![DSO start screen](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Welcome.jpg) | ![DSO at work](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/DSO+Tablet.jpg) |
+| DSO chart screen | DSO chart screen with long info |
 | ![DSO chart screen](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Chart.jpg) | ![DSO chart screen with long info](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Chart_Long_Info.jpg) |
-| ![DSO at work](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/DSO+Tablet.jpg) |  |
 
 ## Linearity of the ATmega328P(B) ADC converter
 The captured signal was generated with a STM32F303 DAC and the DSO input range was chosen to see the LSB of the 10 bit ADC conversion.
 
-| All ranges including the 1 ms range (up to 30 kSamples per second / 26 µs conversion time) have almost perfect linearity. | In the 50 µs to 10 µs ranges with 300 kSamples per second (3 µs conversion time) the linearity is only acceptable. |
+| All ranges including the 1 ms range (up to 30 kSamples per second / 26 µs conversion time) have almost perfect linearity. | In the 50 µs to 10 µs ranges with 300 kSamples per second (3 µs conversion time) the linearity is only acceptable. |
 | :-: | :-: |
-| ![26 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_26us_conversion_time.jpg) | ![3 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_3us_conversion_time.jpg) |
-| First small linearity issues can be seen in the 496 µs range with 60 kSamples per second (13 µs conversion time). | And in the 101 µs range with 150 kSamples per second (6.5 µs conversion time). |
-| ![13 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_13us_conversion_time.jpg) | ![6.5 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_6us5_conversion_time.jpg) |
+| ![26 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_26us_conversion_time.jpg) | ![3 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_3us_conversion_time.jpg) |
+| First small linearity issues can be seen in the 496 µs range with 60 kSamples per second (13 µs conversion time). | And in the 101 µs range with 150 kSamples per second (6.5 µs conversion time). |
+| ![13 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_13us_conversion_time.jpg) | ![6.5 µs conversion](https://github.com/ArminJo/Arduino-Simple-DSO/blob/master/pictures/Linearity_6us5_conversion_time.jpg) |
 
 # SCHEMATICS
 | SIMPLE 1 RANGE VERSION | 3 RANGE VERSION |