BBC Micro analogue in

A custom connector would be required between this D-shape rows of pins port and a standard input socket for phono/rca or 3.5inch or 1/4inch jack.

What would be the bit depth and sampling rate?


No, it can not be used to sample audio.

As the link you provided says, in 12-bit mode it takes 10 milliseconds to convert a sample, and even in 8-bit mode it takes 4 milliseconds.

That results into maximum sampling rate of 250 Hz, which is useless for sampling audio.

The low sampling rate indicates the analog input is meant for slowly changing signals, like sampling a paddle position, and it can be used for datalogging something that changes slowly enough like temperature.

  • Yup, I believe it was intended for attaching a pair of two-axis joysticks or paddles. These days four-axis joysticks are more common, and it could be used to attach one of those. – Chromatix Apr 2 at 18:21
  • @Chromatix Joysticks and paddles were common, but a number of schools and universities connected sensors to the analogue port, to sample data from experiments (as mentioned in the answer). There were also robots / vehicles that used the analogue port. For examples, see link.springer.com/chapter/10.1007/978-1-349-07644-4_3 , computinghistory.org.uk/det/53106/BBC%20Buggy – Kaz Apr 3 at 13:28

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