## 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.

# Scalextric Subaru Challenge Two

Our first Scalextric Subaru challenge showed the use of light gates for timing. This version repeats the experiment using DrDAQ reed switch sensors. (It also gives us another excuse to play with our Scalextric set!)

## The following equipment was used:

• PC with PicoScope installed
• DrDAQ data logger
• Scalextric Subaru Challenge
• 2 x DrDAQ reed switch sensor
• 1 magnet

The idea was to record the speed of a scalextrix car as it passed between two points. To do this two reed switches were mounted beside the track with a distance of 1 metre between them.

So the reed switches could detect the car as it passed, the car was fitted with a magnet taped to the side of the car. Whenever the car passed the reed switches a waveform was recorded on PicoScope.

Figure 1: experiment set up

The PicoScope display below shows the results obtained. PicoScope rulers were used to measure the time interval between the two peaks.

The first peak (Blue) represents the car going past the first reed switch at the start of the 1 metre straight, the second peak (Red) represents the car passing the second reed switch.

From the above screen capture in PicoScope it is possible to calculate the speed of the Scalextric car using the following equation:

Velocity = Distance / Time

The car took 0.633 seconds to travel 1.0 metres so its velocity is 1.58 meters per second. Although this is fairly slow for a car (approx 6 km/h or 3.5 mph) it should be remebered that this is a scale model. Had the car been full size, the speed would have been around 100 mph / 160 km/h.

## Testimonials

• The kit (2408B) is of obvious quality, easy to setup and calibrate and the free to download software has a reasonable learning curve. Superb kit, superb support, what more can I say.

Rop Honnor
• 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
• Rather than webcam our benchtop scope screen, it was suggested we use a PicoScope to share waveforms via screen share.

We were a bit hesitant at first … but it worked flawlessly, and everybody is now out shopping for PicoScopes!

T Lövskog • SVP of Innovation at Additude AB
• 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

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