I am trying to make a circuit
that lights 4 leds one at a time till all are lit then all go off
I have seen a few circuit here http://home.cogeco.ca/~rpaisley4/CircuitIndex.html#48
but cant find one that will do this
K
Try this one as a basis: [url]http://home.cogeco.ca/~rpaisley4/20step.html[/url
Eliminate IC6, you’ll still have 10 outputs where you only need 4. Check the output rating on IC5, it’s an open collector device so it should be capable of driving more than one LED on each output.
–Randy
Checkout Bakatronics. Been ordering from them now and service & support are great! Really good pricing as well!
www.bakatronics.com
If you don’t find something that works for you let me know. This is the kind of circuit project I could use for some fun some evening to keep my skills sharp. Shuffling papers at work is driving me insane.
- Tim
looks like its a bit hard for me
dont think i’m that good
ken
Ken,
Email me at
I can do you a board using a PIC that does that. Plug and play.
Mike Tennent
thanks guys for the input
I have a ton of leds from old computers
I own a computer repair and sales shop
but I dont do the much electronic repair
K
try this one: http://www.mrollins.com/flash2.html …just put four led’s in the circuit and reduce the resistor resistance value a bit…chuck
thanks mike and tim
I never did get this circuit
and I dont know how to program cmos chips but it seem like thats the best way to make complicated circuits like this
how do I get a computer to program pim cmos or whatever chip that holds all the parts
help
To program a PIC you can get the softwrae from Microchip’s web site. The models that support In-Circuit Programming you can jumper the proper pins and program without inventing in a special programmer. The BASIC Stamp would be a good starting point too - most epopel can program in BASIC - and all you need is a simple program to turn on an output, wait a second, turn on the second one, wait, etc. The putput directly ont he chip probably can’t support more than one or maybe 2 LEDs without adding a driver circuit, but that’s easy enough too.
Or look at the circuit on Rob’s page I linked and just leave out what I mentioned, reducing it to a 10-step circuit.
–Randy
This would be a good project for learning about the BASIC Stamp, as Randy hints. The software is free, programming boards are cheap or you can make one yourself. There are several forums and sites with example code and such. It’s a neat little chip that has lots of mrr applications.
Mike Tennent
the BASIC Stamp thats just what I need
I looked and looked but had no clue
thanks to some very considerate people on here im one step closer
what a savings too. theres no need for a huge pile of components
just put it on a pic
I realy felt like I did something when I got the resistors and 555 ic chips to make my crosssing buck flash circuit and it worked… that little system has has lasted for quite some time on a 9 v battery
I know ther are better ways to make flash circuits and new flashing buttons like the ones from new years have been getting more and more elaborate
so with the pic programing wow its just what I was thinking
is the programer very expensive ? whats it called pic progamer??
and thanks for the very generous offers to help me get these electronics side of my layout up and runnng its open ended offers like this that make me glad I ever signed up to trains in the first place
Ken
How about an LED VU meter chip fed by a ramp waveform from a signal generator chip?
Simple kits are available for both. No programming needed.
i’m not too sure abought a LED VU meter chip fed by a ramp waveform
but it sounds just like something elce that I need
I picked up the #12 torks bit and opened my MRC 9500 as I wanted to add lights to the meter
I used 2 ac volt incandescent bulbs and just taped off the vc side of the pack but it looks like its too hot and both have bit the dust … looks like I need some luxion 1 watters in there
or a LED VU meter chip fed by a ramp waveform lol
this is the greatest hobbie
Ken