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
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.
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
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
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
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
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)
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.
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
Have a look @ this: http://www.redcircuits.com/Page8.htm
Great place. 
I need a small amp soon, and I’ve got some 5532’s here.
Thanks!
George
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