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M0KGK Keyer, last updated 2018-11-13
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M0KGK Keyer - Introduction

There are a number of keyer solutions available, many using the ubiquitous PIC chip – a device favoured for its low cost, low external components count, and ease of programming.  It would have been easy to just buy one of these chips off the shelf; indeed K1EL produces very popular keyer chips for as little as US $8 at the time of writing.

However, I really wanted to see analogue speed and weight controls on the keyer and there was a tube of PIC16F877A chips each with 8 x A/D converters going free from a previous project…

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