Entladung eines Kondensators - Revision history

Nefft0n at 13:07, 22 August 2023

2023-08-22T13:07:37Z

Nefft0n: Erster Entwurf Kondensatorentladung

2023-08-16T15:10:22Z

Erster Entwurf Kondensatorentladung

Nefft0n: Created page with "{{Infobox Experiment | Name = Acceleration Spectrum | Category = Tools | Sensors = Acceleration with g }} The experiment "Acceleration Spectrum" displays the frequency spe..."

2023-08-15T17:16:58Z

Created page with "{{Infobox Experiment | Name = Acceleration Spectrum | Category = Tools | Sensors = Acceleration with g }} The experiment "Acceleration Spectrum" displays the frequency spe..."

New page

{{Infobox Experiment
| Name = Acceleration Spectrum
| Category = Tools
| Sensors = Acceleration with g
}}

The experiment "Acceleration Spectrum" displays the frequency spectrum as well as the peak frequency of acceleration data. You can choose the number of samples used for the spectrum. If you incease the number, the spectrum will have a higher resolution allowing for more precise frequencies. If you decrease the number, you will get faster responses to changes.

The maximum frequency in the spectrum is determined by the acquisition rate of the sensor (actually, it is half the acquisition rate). So, the spectrum will depend strongly on the device.

==Requirements==
There are no hardware requirements. The accelerometer is used for this measurement.

==Setup==

There is no specific setup.

==Analysis==
This experiments records the acceleration and keeps a history of the values. The Fourier transform is calculated over the last N samples, with N being chosen by the user. The peak frequency is the frequency of the maximum of the Fourier transform.

==Problems and resolutions==

* The frequency resolution is too low. The frequency resolution is limited by the length of the recording. By increasing the number of samples, you can increase the resolution, but this will also slow down the response to changes.
* The maximum frequency is too low. The maximum frequency is half the acquisition rate of the sensor (Nyquist frequency). So, the maximum frequency is a limitation of your device.

[[Category:Arduino library experiments]]

@@ Line 4: / Line 4: @@
   | Sensors = Voltage
 }}
 In diesem Experiment sollen die Schülerinnen und Schüler die Entladungskurve eines Kondensators messen. Dafür wird der analoge Eingang eines ESP32 (ein günstiger Mikrocontroller) verwendet. Der ESP wird mithilfe der Arduino-Bibliothek so programmiert, dass er die Daten an phyphox übertragen kann.

@@ Line 1: / Line 1: @@
 {{Infobox Experiment
-  | Name = Acceleration Spectrum
+  | Name = Entladung eines Kondensators
-  | Category = Tools
+  | Category = Arduino library experiments
-  | Sensors = Acceleration with g
+  | Sensors = Voltage
 }}
-The experiment "Acceleration Spectrum" displays the frequency spectrum as well as the peak frequency of acceleration data. You can choose the number of samples used for the spectrum. If you incease the number, the spectrum will have a higher resolution allowing for more precise frequencies. If you decrease the number, you will get faster responses to changes.
+In diesem Experiment sollen die Schülerinnen und Schüler die Entladungskurve eines Kondensators messen. Dafür wird der analoge Eingang eines ESP32 (ein günstiger Mikrocontroller) verwendet. Der ESP wird mithilfe der Arduino-Bibliothek so programmiert, dass er die Daten an phyphox übertragen kann.
-The maximum frequency in the spectrum is determined by the acquisition rate of the sensor (actually, it is half the acquisition rate). So, the spectrum will depend strongly on the device.
+==Aufbau==
-==Requirements==
+''Aufbauanleitung''
-==Setup==
+Anschließend kann direkt losgelegt werden. Die entsprechenden Schaltbilder sind in den Arbeitsblättern zu finden.
-There is no specific setup.
+==Programmierung==
-==Analysis==
+Es ist darauf zu achten, dass jeder ESP32 eine eigene Kennung hat (diese wird in ''::start(ESP Voltmeter XY)'' festgelegt). Anschließend kann über das Plus-Symbol in phyphox ein Bluetooth-Experiment hinzugefügt werden, das Experiment wird dann automatisch geladen.
-==Problems and resolutions==
+int ADC_GPIO = 25;    // ESP32
-* The frequency resolution is too low. The frequency resolution is limited by the length of the recording. By increasing the number of samples, you can increase the resolution, but this will also slow down the response to changes.
+void setup() {
-* The maximum frequency is too low. The maximum frequency is half the acquisition rate of the sensor (Nyquist frequency). So, the maximum frequency is a limitation of your device.
 [[Category:Arduino library experiments]]