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This video revisits a 74AC14 Schmitt Trigger Oscillator project that was used for several videos including a TDR (time domain reflectometer) as well as measuring unknown capacitors and inductors. The reason for revisiting this circuit is because a viewer (Marcus Jenkins - EA5IGC) sent me a copy of the board he designed, and I wanted to show him how it performs compared to my original prototype. Here are links to the videos and blog that I mention in this video:
My initial video on the schmitt trigger oscillator:
• #87: Schmitt Trigger O...
My video on a cheap TDR using this oscillator:
• #88: Cheap and simple ...
My original video on TDR (uses a signal generator, but theory is same):
• #37: Use a scope to me...
Measuring unknown capacitors and inductors:
• #90: Measure Capacitor...
Measuring coax velocity factor and impedance:
• #162: How to measure c...
Marcus' blog on this PCB project:
bit.ly/1ANeKWH
Link to order your own boards:
bit.ly/1MgU9wA
Note - my iPad case/stand is by ZooGue - very nice high quality, stable stand.