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Electronics Circuits & Projects discussion forum. Get help with electronics. 2018-03-01T11:51:19+00:00 https://electronic-circuits-diagrams.com/forum/feed.php?mode=news 2018-03-01T11:51:19+00:00 2018-03-01T11:51:19+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6702&p=17759#p17759 I have a 7Hz 5Vpp square wave signal, you give me an advice on an easy way, to turn that signal into the corresponding DC voltage, so I can read it through the microprocessor's ADC converter?

Thank you.

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]]> 2017-07-31T09:31:58+00:00 2017-07-31T09:31:58+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6660&p=17682#p17682 I used 74HC137 to create a 6-to-64 demultiplexer following the schema on page 13 of the attached datasheet ...
Now I have to do the reverse operation, that is 64-to-6 ...
How can I do?

Thank you.
https://assets.nexperia.com/documents/data-sheet/74HC137.pdf

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]]> 2016-06-08T22:38:50+00:00 2016-06-08T22:38:50+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6534&p=17462#p17462
I'm trying to build a lm35 thermostat using 2 opamps with hysteresis

this is the circuit I'm trying to make:

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]]> 2016-06-08T14:03:17+00:00 2016-06-08T14:03:17+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6533&p=17461#p17461 voltage to~500vac and bridging to dc in order to charge a capacitor bank of 4000ufelectrolytic
(40x100uf500vdc in parallel) in an experimental project, What I need is more rapid
charging by greater efficiency or increased amperage from the transformer secondaries.
Perhaps some sort of dc/ac invertor system or another method like flyback transformers
or such. I am open for suggestions to achieve bank charging of 50-70mS, thank you

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]]> 2016-05-31T20:39:06+00:00 2016-05-31T20:39:06+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6532&p=17453#p17453 Please, help a newbie.
Few months ago I started playing with electronics and I ran into a problem which I couldn't solve or at least understand.
I've got some ACS120 switches/triacs from ST and wanted to use them with Arduino to switch on/off something in my house (say water pump, light, etc.).
But I need help understanding how to connect them together properly to avoid burning out my arduino board, as I don't understand the schema on Fig.14 (basic application) from ACS120 datasheet (http://www.st.com/content/ccc/resource/technical/document/datasheet/ab/bb/71/82/14/79/4f/6f/CD00003319.pdf/files/CD00003319.pdf/jcr:content/translations/en.CD00003319.pdf)
Could someone explain me how it works?

PS: On the forums people said I should go with optocouplers, but I think the circuit from the datasheet is way simpler. Just need to understand how to manage it to work.

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]]> 2016-05-16T02:01:37+00:00 2016-05-16T02:01:37+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6531&p=17430#p17430
Thanks.

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]]> 2016-05-07T21:12:57+00:00 2016-05-07T21:12:57+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6530&p=17423#p17423
I need to make a circuit which generates, at least, 16 distinsts waveforms(change the frequency or the length)
I have to use a multiplexer with 16 differents outputs, a counter and a 5Hz clock.
I need also to change the output wave by switching the keys and put a LED in the output. (See the attachment)

I've already done the clock using an IC 555 and I've tried to build this circuit with the multiplexer and the counter, but it doesn't work.

I will attach my current circuit and how should be my outputs(there´s only 4 in the picture I need to make 16 differents waveforms).

What changes should I make?

Thanks for your help!

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]]> 2016-05-03T12:20:20+00:00 2016-05-03T12:20:20+00:00 https://electronic-circuits-diagrams.com/forum/viewtopic.php?t=6529&p=17411#p17411 My lights run from a 12v battery, I know I need some sort of sound sensor, I would like the lights to stay on for a couple of minutes then go off, is there any chance you could do a circuit for me
Cheers
Paul

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