Metronome.

[Dave_Wheeler]

Hi Does anyone have a design for a metronome. It needs to display BPM and have adjustable accent (1/1 - 1/8)

Trying to avoid reinventing the wheel.

TIA

Dave

[Attila]

A really simple metronome could be made with an NE555, but I'm afraid that you cannot adjust the accent or mount a BPM display. Anything can be made with this chip... Or use a really simple and common PIC. I don't have other ideas, but I bet there are lots of these circiuts.

[audiocommander]

Sounds like you're searching for this one:

http://www.ucapps.de/mios_download.html

--> http://www.ucapps.de/mios/clockbox_v1_0.zip

"Outputs MIDI clock and 24ppqn signal (see also this forum article: http://www.midibox.org/forum/index.php?topic=5691.0 )"

Should be easy to hook a LCD and crunch some numbers

:)

Regards,

Michael

[Dave_Wheeler]

Thanks Guys,

Found exactly what I was looking for in an old edition of EPE which also includes instrument tuning and runs on a pp3 battery. No display but worth loosing that for portability after all it is for my 13 year old daughter  :)

Cheers,

Dave

[Jidis]

Outputs MIDI clock and 24ppqn signal

Thorsten's is just for clock output though, no audible clicks, right? (said the lazy-assed man who wouldn't go re-read the docs)

Dave,

Craig Anderton had a really simple version of one of those 555 circuits in his Electronic Projects for Musicians book. I built that one once. It could easily drive a small speaker up to a fairly obnoxious level on it's own, and it put off a nice smooth "tuck" sound for the clicks, with the enclosure and speaker I used. Mine was using a 9v battery.

I want to see some diagrams for making common blip & beep noises with standard piezo elements or scavenged PCB-mount piezo packages, if anyone knows of any.

BTW- In the way back of my head, I sort of remember seeing a PIC-based metronome project out there somewhere.

Take Care!

George

[airmailed]

hi Dave,

I've got a schematic in a book.. my scanners playing up right now... but it uses a 555 and a 4017 counter, 555 for the sound, 4017 mainly for driving some led's to show time visually....the accent is done by hooking up a  piezo to the first output of the 4017 so that the first beat of the bar is accented...

more 4017 tips here... http://members.shaw.ca/roma/thirty-four.html

[Jidis]

alright man, got me stuck on there. >:(

...I was supposed to be doing something else. ;D

I like that cap meter. May get the junk for it on a Digikey order I'm building.

My piezo thing is more just for general "beeps" and alerts. (not so much a metronome as Dave's)

[Davo]

hi Dave,

I've got a schematic in a book.. my scanners playing up right now... but it uses a 555 and a 4017 counter, 555 for the sound, 4017 mainly for driving some led's to show time visually....the accent is done by hooking up a  piezo to the first output of the 4017 so that the first beat of the bar is accented...

more 4017 tips here... http://members.shaw.ca/roma/thirty-four.html

Mmmm... It looks like a 4017s, 555s, and some seven-segment drivers can provide a metronome as originally specified.

[Jidis]

Just went DIY MIDI fishing on the web and accidentally ran across another:

http://www.maxmidi.com/diy/metro/index.html 

It uses a PIC16C54, but could maybe even be ported to something easier to get or smaller. It spots incoming MIDI clock, and flashes a bi-color LED (one color for the accents). It's not as elaborate as what Dave wanted, but it looked sort of interesting, and may be usable to someone as a separate "add-on" to a MIDIBox.

-also pulls it's power from the MIDI line  ::)

There's a hex and source on that site, but the code looked funky or old to me.

-George

[Attila]

Have a look @ this: http://www.redcircuits.com/Page8.htm

[Jidis]

http://www.redcircuits.com/Page8.htm

Great place. :D

I need a small amp soon, and I've got some 5532's here.

Thanks!

George

[Dave_Wheeler]

Great Site Attila,

There is also a more complex unit on the same site.

I have built the EPE tuning control and metronome (PIC Based  :))

Dave