m very much interested in making this but i need help... so if ny 1 out there can just breifly explain the basic principle of this circuit ill b really thankfull.. please help asap i need to make it urgent just have 10 days for it
A metronome is for keeping rhythm or tune. The LED Metronome is a modern interpretation of a classic device which is a staple of music teachers, students and composers everywhere. This circuit uses 12 LEDs to simulate the sweeping motion of the pendulum and a speaker with a simple amplifier to generate a tick as the LEDs at the end of the arc are struck. It is adjustable from about 40 BPM to just over 200 BPM.
If you don't have the time to do it right, when will you have the time to do it over?
Like most projects on this site this one is also missing a very important supply bypass capacitor. The old high current 555 creates a 400mA supply current spike which messes up the Cmos counter unless 100uF and 0.1uF supply bypass capacitors are used. A Cmos 555 could be used since it does not create a supply current spike.
A metronome is for keeping rhythm or tune. The LED Metronome is a modern interpretation of a classic device which is a staple of music teachers, students and composers everywhere. This circuit uses 12 LEDs to simulate the sweeping motion of the pendulum and a speaker with a simple amplifier to generate a tick as the LEDs at the end of the arc are struck. It is adjustable from about 40 BPM to just over 200 BPM.
Hey thnx 4 replyin n i really appreciate ur concern but actually i need some details regarding the working of the circuit not outlines of this project....... like how do i make a report about this project i just cant say it a METRONOME........ Plz help.....
quote:[i]Originally posted by mrbains21 i need some details regarding the working of the circuit not outlines of this project....... like how do i make a report about this project i just cant say it a METRONOME........ Plz help.....
Simply learn about what its parts do: A few resistors, capacitors and diodes. Ten LEDs. Two 2N3904 transistors. 555 timer IC. 4029 Cmos up/down counter IC. 4051 Cmos 1-of-8 switch IC. 4011 Cmos quad 2-input NAND gate IC.
1) One microcontroller 2) 10 LEDs 3) 4 AA batteries 4) Small Speaker 5) A computer to write the code with, program the micro and a brain to figure out how to do it.
That's right, no resistors!
Note: A Quartz watch crystal and two 15pF caps may be needed if the designer prefers high clock accuracy.
Learn about Micro-controllers.
When one person suffers from a delusion it is called insanity. When many people suffer from a delusion it is called religion.
The new circuit uses only one NE555 oscillator. Look up its datasheet in Google or in www.datasheetarchive.com to see which capacitor value will make suitable frequencies when used with the resistor values in that circuit. Maybe 0.47uf to 2.2uF will work.
It won't sound like a metronome. It just clicks. A metronome has a resonant sound like a block of wood being ringed.
The new circuit uses only one NE555 oscillator. Look up its datasheet in Google or in www.datasheetarchive.com to see which capacitor value will make suitable frequencies when used with the resistor values in that circuit. Maybe 0.47uf to 2.2uF will work.
It won't sound like a metronome. It just clicks. A metronome has a resonant sound like a block of wood being ringed.
C2 is shown as 22uf to make knock sounds. If it is only 0.22uF then when the volume control is turned up the speaker would make tick sounds. The capacitor from pin 5 to ground is not needed for the metronome.
This is a small note to mrbains the site that you have have mentioned is an absolutely a site to waste our money THIS IS A NOTE TO EVERYONE PLEASE BE CAREFUL BEFORE YOU TAKE A CIRCUIT FROM ANY OF THE SITES GIVEN BELOW
electronics for you circuits today electronics maker etc.
I am saying all this because I have experience doing a night light circuit from circuits today.The result i got was a blown mains fuse and leds on fire.I am saying this because all the above are Indian sites never to be trusted.Even though I am an Indian never trust any of the given above sites.So after all care is better than cure
Help me my amplifier is on fire and my speaker is inside a beaker
There is another site in India with projects that are at least 40 years old and using parts that were obsolete and no longer available many years ago. Most of the circuits have serious errors and do not work.
Would like to get some hints on how to send the information to a 7-segment Display. We're having a hard time trying to figure this out, we even thought of using an ADC.
I'm a student of electronics, so please don't mind the ignorance!
Led metronome circuit
Posted - Feb 27 2010 : 06:40:44 AM
