Yes. LabQuest is capable of putting out an analog output signal to the audio out connector. The miniature stereo connector is located on the left side of an original LabQuest, on the top of the LabQuest 2 under a protective flap, and on the top of the LabQuest 3 next to the power button. The current driving capability is low, so to do some experiments you will need to use our Power Amplifier (PAMP) to increase the current.

There are two applications that can be used to control analog output on LabQuest. These apps are accessed from the LabQuest Home screen.

Audio Function Generator
This application is meant to produce sound on two channels from the internal speakers of the LabQuest or from any speakers connected to the audio out connector. The frequency and waveform for each channel can be controlled independently. You can use this feature to nicely demonstrate beats. The frequency range is 0.25 to 10,000 Hz. For information about using the internal microphone and the Function Generator for experiments, see .

Power Amplifier
This application is meant to control the output from our Power Amplifier unit (PAMP) connected to the audio out connector of the LabQuest. The frequency and waveform can be controlled, or you can set a DC voltage level. The AC frequency range is 0.25 to 10,000 Hz.

If there isn’t anything connected to the audio out connector, the analog out will be sent to the speakers built into the LabQuest.

Note: If you are using LabQuest connected to a computer, the analog output from a LabQuest can be controlled using Logger Pro version 3.8 or newer.

Differences between LabQuest and LabPro
There are several differences between LabQuest and LabPro regarding analog output:

– On LabQuest, the analog output signal comes from the audio out connector. On LabPro, the analog output signal comes from the CH4 BTA connector.

– LabQuest has a much wider range of frequencies, 0.25 to 10,000 Hz. LabPro is limited to a maximum of 166 Hz. This limits its use to mostly mechanical experiment such as vibrating strings and springs and low frequency signals used with lamps to show resistance change. LabQuest allows you to do sound experiments and RLC electronic circuit experiments, which require much higher frequencies.

– LabPro can supply 100 mA of current, so most experiments can be done with the LabPro without using the Power Amplifier. The current driving capability of LabQuest is low, so to do experiments other than producing sound, you will need our Power Amplifier to provide more current.

Related Products
Power Amplifier (PAMP)