An oscilloscope and logic analyzer for the Raspberry Pi

The BitScope Micro [1] measures, analyzes, and creates electrical signals. Once it is combined with suitable software on a computer, it can also function as an oscilloscope, logic analyzer, and signal generator. Because this type of software is available for a Raspberry Pi, the manufacturer of the BitScope Micro explicitly states in its advertisements that the unit can be used with the small-board computer. The diminutive size (~5 inches long and less than 1 inch wide/125x21mm) and moderate price ($145/£89/EUR109) help to support these claims. Given that the Pi is not exactly known for high performance, I was curious to find out whether the little computer could support the demands of the BitScope Micro.

Features

The price [2] for the BitScope Micro is significantly lower than competitor units that have been on the market for some time now. The Micro features six digital and two analog inputs that have a sampling rate of 20 megasamples per second (MSps) for analog acquisition and 40MSps for digital signals. The storage capability is just large enough to capture 12Ks (kilosamples) on a single channel. The numbers become correspondingly smaller when using multiple channels. The inputs handle up to 12V, and a signal generator is built into the unit.

The BitScope comprises a single board about the size of a small candy bar (Figure 1) with a USB port at one end and a pin strip for connecting sensing elements at the other end (Figure 2). Ten small alligator clamps are included for use in connecting the sensing elements (Figure 3). If you are looking to use professional sensing contacts, you need an adapter for the pins and pin board, which you can purchase directly from BitScope [3] or build yourself.

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