FH-Bielefeld Frequency

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/263150/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=724&title=Frequency+over+Time&type=line&xaxis=Time&yaxis=Frequency+%5BHz%5D"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/apps/matlab_visualizations/159825"></iframe>