Experiments, inventions, patents, …
The Arduino is a flexible platform for controlling all kinds of devices from all kinds of input signals. Here I demonstrate the most basic Analog Input — a voltage from a potentiometer — and…
Here I show the Little-Known feature of the Tek 2213A analog scope. Apparently not many people know how to display stored waveforms from these old analog scopes. The process is somewhat different from that…
Quantitative frequency measurement with an analog scope? Without numbers in boxes? (by request… thanks shubus) Well, we did use one number from a box. You need some kind of external frequency standard so that…
Whats In Side A Vintage Analog CCTV Video Camera? CRT Video Recording Device? (Vacuum Tube) Model: WV-1004A Manufacturer: Panasonic Electronics Type: Black & White Camera Year: 1978-1980 B/W VIDEO CAMERA w-2/3″ VIDICON & LENS,…
2x 2n3055 npn bipolar transistors 2x ignition coils with no resistors -Test leads for connections -at least one 12vDC 3 watt led bulb -analog ammeter 0-5 amp (or 0-1Amp would work:) -12 volt battery…
2x 2n3055 npn bipolar transistors 2x ignition coils with no resistors -Test leads for connections -at least one 12vDC 3 watt led bulb -analog ammeter 0-5 amp (or 0-1Amp would work:) -12 volt battery…
More quantitative scoposcopy of the Tar Baby’s current viewing resistor (“shunt”). Now that I have shown instrument calibrations and have explained the bias current and the oscillations using the meters and the oscilloscope, the…
I tossed the idea out and .99 took up the challenge and worked the circuit out in his simulation software, and I built it, and it works. Just like the sim said it would…
Here, instead of looking at the voltage on the mosfet common drains, I am looking at the voltage drop across the current viewing resistor, aka shunt. The resistor’s value is 0.25 Ohms, so by…
Here I show the calibrated Hickok meter in series with TarBaby’s negative bias supply using the potentiometer and a regulated power supply (the PS instead of a 9v battery, for stability during the demonstration.)…