#DIY WORD CLOCK GENERATOR GENERATOR#
Providing an accurate set of twelve reference pitches is the job of the top-octave generator (TOG) chip, a part which isn’t made anymore. Dividing a frequency by two lowers its perceived pitch by an octave which meant that, if you could accurately generate one pitch for each of the twelve tones in the scale, you could use flip-flops and divide down to cover the entire keyboard. In particular, these designs leverage the ability of a flip-flop to take an input frequency and divide it by two easily and cheaply. (At least for mass-market instruments: a real pipe organ in a big space is still a delight to hear in person.)īut for a brief period of time between the tonewheel and the VLSI eras, there was a decade of home organs that were designed with the readily available wonder technology of that era, discrete logic ICs. By the 1980s, all of this sound generation could be contained in a dedicated IC, ending the era of the giants. A Hammond is still not a small machine, but it was positively compact compared to the pipe organ. Then along came the Hammond organ, which from 1935 to the mid 1970s made sound by spinning metal disks with periodic cutouts in the presence of an electronic pickup.
Pipe organs make sound by vibrating air in tremendously large tubes, one per pitch. Can you help repair his organ with a minimum amount of expenditure and hassle? All we need to do is produce twelve, or maybe thirteen, differently pitched square waves simultaneously. So we’re passing the buck on to you, dear Hackaday reader. I replied “I should be able to get that done with a single Arduino” and proceeded to prove myself entirely wrong in short order. He had found a complicated but promising circuit online, and was wondering if there was anything simpler. Case in point: wrote in with a busted 1970s organ in need of a new top-octave generator, and wondered if we could help. One of the great joys of Hackaday are the truly oddball requests that we sometimes get over the tip line.
0 kommentar(er)
