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May help
Basic is sometimes easier than overthinking.
Whats wrong with your MPU driving a relay? 10k from the output to the base of a NPN transistor, emmitier to ground and relay between supply and collector, dont forget back EMF diode protection.
Get out
Are you serious that is just criminal never heard that story. Thanks for the data
What a laugh.
Did it kick up a storm?
Seems GE may have been the pioneers of designed obsolescence. Look at the following they are getting now lol.
hi Audioguru
Yes that is right, when diodes are used they are usually in pairs and act as gates, this is just another method.
Seems to be a lot of conjecture when it comes to the scanner circuits with 4017's i thought this would at least cure the dilema.
No hard feelings Guru and yes your...
Hi Eric
yes it works, although some what old technology now, a nice little pic would do just as well and give a few more patterns for some better effects.
Nothing worse than a little bit of knowledge, I would rather creative banter, I will stick around on this site for a while and maybe MrDeb...
Seems everyones an expert:
The 4017 can not by it self go back and forwards as it is a simple divide by 10 counter it is in fact an illusion its all in the way the LED's are connected- it just appears that the LED's are scanning left to right and right to left.
What i have done is actually...
Good old days
Thanks for the vote, I am of the oppinion the old stuff was built well, open an old tube radio and try and find a dry joint on a tag strip, electrolytic caps have air around them and not mounted next to heat sinks at only 85 degree rating doomed for failure. Or stuck to a PCB...
other solutions
This is a nice little Atmel 8 Bit Micro with One 150 kHz, 8-bit High-speed PWM Output he can do all sorts of wonders like a common anode 32 level PWM circuit and drive with active Hi NPN column drive transistors. Charlieplexed of coarse. If the guy wants a circuit just ask.
A new age
Testament is in the hands of all servicemen and women around the world who will gladly rise to the podium and hail vintage radio for its longevity. "No" today’s parts do not last and many will debate designed obsolescence to make sure sales continue.
Buy a part today and no longer...
Old caps
Hi, These are caps do not replace them unless faulty, they will last longer than you and I. Not like todays components they were build to last in them there days.
Just for Audioguru
:mad: Again! I reiterate the original drawing had the correct values for the clock and the decoupling. The second post was to correct the 4017 outputs.
As Mr AudioGuru is so pedantic and cannot read and needs to feel he has to correct me, i have for his benefit filled in...
Really
The original circuit had the correct values. this post was to correct the outputs of the 4017, really! have you nothing better to contribute other than debate the clock. the 4017 was the subject.
If you need help with something i will show you how, but not if your going to be a...
Yes it was late and i did not show the correct output configuration. I am like most Guilty of to many hours on the NET.
I have uploaded a new drawing and explanation to show how a 4017 can work in this fashion.
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