Using shift registers with fewer I/O pins

If you need to use an 8-bit parallel to serial shift register (such as a 74HC165) but can't spare the three data pins on your microcontroller, this small hack may be of interest. The people at Open Music Labs have described a method which only uses one microcontroller pin to not only receive the data from the shift register, but also to clock and latch it. This involves switching the MCU I/O pin between input and output, however this is certainly achievable.

So for the digital electronics enthusiasts, this could be a fun little challenge. For more information and notes, visit the blog page here. And for more news, updates and items of interest, please follow us on twitter, Facebook and Google+.

If you're in need of a few shift registers, or any manner of electronics componentry - as well as component bundles and starter packs for beginners ... do check out our components catalogue. We're sure to have what you need in stock, and if not can have it to you very quickly.

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