DrDAQ

Data logger, oscilloscope, signal generator and more!

DrDAQ is a versatile instrument that connects to the USB port of any PC. Using the supplied PicoScope software it can be used as an oscilloscope, spectrum analyzer and signal generator.

From just £89.00

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Measuring switch bounce: results

Answers

  1. Question: Do you notice a link between the size of the switch and the length of its switch bounce?
  2. Larger switches tend to generate more bounce due to the size of their contacts and inertia. Also, all things being equal, newer switches tend to bounce less than older switches.
  3. Question: Was there a link between the number of hours spent at video games and the speed at which you could press the switch?
  4. Question: Do you think there is a link between the best size of the capacitor and the value of the resistor used in the circuit?
  5. Answer: Keeping the RC value as high as possible is important in minimizing the height of the "bumps"
  6. Question: What would happen if a very large capacitor were used?
  7. Answer:If a small switch is used, too large of a capacitor will create excess current across the switch contacts. This is both hard on the switch, and will actually cause the "bumps" to get higher, due to the capacitor not discharging completely before the next bounce event. This causes a "staircase" series of bumps to appear on the scope trace.
  8. Question: Discuss some other ways in which a switch can be "debounced".
  9. Answer: Many electronics books explain debouncing circuits using SPDP switches and SR flip-flops. Software delays upon reading the first edge can of course negate the effects of the extra bounces.

Testimonials

  • I have been using my 4224 PicoScope for years. I travel abroad so this has been ideal due to its physical size. Storage of waveforms on my Laptop is very easy allowing me to quickly email waveforms to my Colleagues.

    Andrew
  • Not many USB scopes works on Win & Mac & Linux too, so that proves me that guys from Pico really cares about us, customers. This made my decision much easier when I was looking to buy an USB scope.

    Raul Trifan
  • We have been using Picoscope 6404D for quite some time, and are amazed by its accuracy and powerful emulations while working with numerous signal evaluations.

    J Mohanty
  • PicoLog TC-08: This is a very nice unit that works consistently and reliably.

    Jeff Hulett
  • It is a great scope. I had a weird problem - it did not work on one of my PC’s. Customer service gave me first class service. If I could give 6 stars for customer service - I would do so.

    Niels Larsen
  • Perfect Partner for Development of Encoder controlled Stepper Motor Actuators. Since the included software is really stable, this type of device is a great tool for great tasks!

    Helmut Schoettner
  • A superb piece of equipment worth its weight in gold

    Nigel Clinch
  • So simple to use & beats any other I have ever used hands down.

    John D Samsing
  • Great functionality in a compact size. I really like moving the mouse pointer to a position and having the Time and Voltage display the values at that point. Calibration equipment is a breeze with that feature.

    Don Horein

PC oscilloscope and data logger products

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