led heartbeat

[MadBoy79]

hi all
i need from help .
I want build simple led light circuit - something like this

and if his circuit to change the frequency .

Thank you in advance.

 

[(*steve*)]

Hahaha. Search this site for heartbeat and find a post by KrisBlueNZ and you'll find something that amazed us all.

I'll save you the trouble. it's here:

https://www.electronicspoint.com/please-help-me-project-t252639.html

 

[CocaCola]

If you want sound detection there are plenty of circuits and even kits out there that will do that...

I have played with this one and it works well...

http://www.amazon.com/Velleman-Sound-Light-Kit-MK103/dp/B000TA3FK8

 

[MadBoy79]

I'm looking for a scheme that turns on and off with this LED effect - compared with conventional multivibrator 555.
When I use the red Power LED and Built-in plastic heart - the effect will be great

 

[CocaCola]

I'm looking for a scheme that turns on and off with this LED effect - compared with conventional multivibrator 555.
When I use the red Power LED and Built-in plastic heart - the effect will be great

Did you bother taking 5 minutes to follow the link provided by Steve to Kris' design? Probably not based on this response...

 

[MadBoy79]

i have a solution
http://img822.imageshack.us/img822/6900/ledheartbeat1fading.jpg

 

[(*steve*)]

Beware that the circuit you've shown us has unused inputs of the 4017 left floating.

This is poor practice and you should tie them somewhere. Check the datasheet and tie reset to wherever DOESN'T reset the chip, and enable to wherever it DOES enable the outputs.

 

[CocaCola]

Beware that the circuit you've shown us has unused inputs of the 4017 left floating.

This is poor practice and you should tie them somewhere. Check the datasheet and tie reset to wherever DOESN'T reset the chip, and enable to wherever it DOES enable the outputs.

On that note there are also other problems with pin 13 and 15 left floating (noted above), as shown you will not get reliable results, it's really a roll of the dice on what it will or won't do with any particular start up...

 

[MadBoy79]

ok
I just showed you the idea. I know there are errors

 

[MadBoy79]

http://img560.imageshack.us/img560/6562/ledheartbeat1lastversio.jpg

 

[MadBoy79]

hello

What do you think

 

[(*steve*)]

Cool!

It may be better if you could diffuse the light from the LEDs a little more, but unless you're looking directly at them, the effect seems nice.

 

[cjdelphi]

a 3rd option is to use a micro controller.

it would be only a few lines long and only a very basic chip would be required to do a heart beat effect and a whole lot more..... (eg, attiny85 or a PIC)

 

[cjdelphi]

That heart beat one seems to be a very wasteful circuit

http://img822.imageshack.us/img822/6900/ledheartbeat1fading.jpg

 

[duke37]

The circuit refered to in #14

The 4017 has its outputs almost shorted to ground. This may be too much for it. Put a 1k resistor in the outputs to limit the current.

A capacitor across the power supply would not be disadvatageous.

 

[MadBoy79]

That heart beat one seems to be a very wasteful circuit

http://img822.imageshack.us/img822/6900/ledheartbeat1fading.jpg

Sorry I forgot to show the version of the scheme.
The picture that comment - scheme gives errors and does not work.
After using a diodes and capacitor in parallel with the LED bar = scheme is working not even stop for a whole day.
http://img841.imageshack.us/img841/6562/ledheartbeat1lastversio.jpg


in the first video I did not use a capacitor.

 

[KrisBlueNZ]

The design at http://img822.imageshack.us/img822/6900/ledheartbeat1fading.jpg has a number of problems, too many for me to bother going into. Even with those fixed, it won't produce a very realistic heartbeat effect.

 

[MadBoy79]

HAPPY NEW YEAR