Inline graphics on this page: 36K

Oscilloscope images made by Ken

Terms like `Q4-C' refer to the collector of a transistor in the diagram below.
Circuit diagram by Ken H. 

Below: The full frame with a 5Vdc power supply connected
       to C1 through a 3K3 resistor.  
       White (WHT) waveform C1+ to GND
       Violet (VIO) Effective motor voltage, WHT + (-GRN)
       Green (GRN) Q4-C  (motor)
Scope image by Ken H. 

Below: An expanded view of the one above.
       White (WHT) waveform C1+ to GND
       Violet (VIO) Effective motor voltage, WHT + (-GRN)
       Green (GRN) Q4-C  (motor)
Scope image by Ken H. 

Below: An expanded view of the relationships between the C1, 
       Q1-C Q2-C waveforms.
       White (WHT) waveform C1+ to GND
       Yellow (YLW) waveform on Q2-C
       Green (GRN) waveform on Q1-C
Scope image by Ken H.

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