In June 2023, the Web VPython Go Direct library was updated. One change to the library was to return a 'None' value from gdx.read() when a new sensor value is not yet available. The previous library did not return a 'None'; instead, it sent duplicat...

For information on correction factor values, see Can I use Vernier PAR sensors with electric lights? When do I need to use a Correction Factor? You may need to apply a PAR sensor correction factor if you are measuring PAR underwater, in certain f...

Chipboard is a lightweight, yet stiff, paper based material that is great to use for making blades for wind turbines. We have tested many different methods to cut the chipboard into different lengths and shapes. These are the items we have found wor...

The KidWind LED Board was designed for use with the KidWind 2V/400mA Solar Panel (KW-SP2V) and/or the KidWind Wind Turbine Generator with Wires (KW-GEN3), found in all of our wind turbine kits. However, it can also be used with other low-voltage pow...

There are two critical steps to being able to open a .csv data file in Graphical Analysis. The first has to do with the format of the data, and the second has to do with a subtle change required to "see" the .csv file from within Graphical Analysis....

The User Manual for the Resonance Apparatus (RES-APP) includes basic instructions for determining the speed of sound using the Resonance Apparatus. In addition, the lab manual Physics Explorations and Projects (PEP) contains a Speed of Sound expe...

To determine the resonance lengths of a given frequency sound using the Resonance Apparatus (RES-APP), we recommend the following: Go Direct® Sound Sensor (GDX-SND) (use the Sound level C-weighted channel)or Sound Level Sensor (SLS-BTA) ...

Resonance Apparatus (RES-APP)Resonance Apparatus User Manual Instructions for using the Resonance Apparatus are available in the User Manual, above. The Resonance Apparatus (RES-APP) consists of two acrylic cylinders. The outer cylinder has a ...

Logger Pro, Graphical Analysis and other Vernier apps use the ALGLIB numerical analysis package for curve fits and other statistical calculations. We perform spot-checks of the fits against NIST standard curve fit data sets to verify the accurac...

Go Direct® PAR (Photosynthetically Active Radiation) (GDX-PAR) Specifications and User Guide Troubleshooting General: Press the power button on the sensor to turn it on. Connect your sensor as described in the Getting Sta...