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Hi, To achieve what you would like you need a programmable timer to be able to set the ON-OFF time at high precision. I don't know if you can find such timer in the market, as most timers are rated about 16A and are weekly programmable. What possibly you could do is to use a timer to set the ON time and keep the OFF time manually. In this case a timer like: http://www.electronics-lab.com/project/2-digit-99-seconds-timer/ http://www.electronics-lab.com/project/1-to-100-seconds-timer/ may help.

I would be perfect if you share your review building this PSU with other members on the community.

Thanks for sharing this project. I just edited it a bit, so code would look better.

Is this something like the photo below? These are called "breadboards" and comes in different sizes. They have the pins in a row connected together so they are used to create various circuits by plugging the components.

He will need something more powerful at least for the 16Vdc rail. Something like the LT3845A, which has 60V input voltage and 15A output current may work for this application. Datasheet: https://www.mouser.com/ds/2/609/3845afa-1270855.pdf

We will need more info, so we are able to help.

Hi and welcome to our forum, I would like to let you know that we have featured your campaign to our blog: http://www.electronics-lab.com/isolated-usb-uart-converter-arduino-pro-mini/ Hope you like it. Best Regards

Can you be more specific on what you would like to achieve?

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Can you please check now and report back? We have done some updates on the community software.

Thanks for reporting this issue. I will check and get back to you.

This topic is to clarify the specs of T1 transformer used in http://www.electronics-lab.com/project/power-supply-brushless-motor-drivers/ T1 is a Standard EMI/RFI Transformer for electromagnetic noise, any 15/16mm transformer with 1mH inductance will work. This transformer is used to reduce EMI/RFI noise and doesn't provide isolation from mains voltage. I am attaching here the datasheet of the transformer. pmcu.pdf

Hi and welcome to our community! Feel free to start a new topic about your project/question etc

You may check this blog for a revised version of the popular 0-30V PSU: http://www.paulvdiyblogs.net/2015/05/tuning-030v-dc-with-03a-psu-diy-kit.html

These also seems like capacitors to me. I also found a chart that looks pretty close to their marking.

The diode is needed for the circuit to work, otherwise you may damage the IC or your load. Without this diode the switching of LM2596 can't occur. You may use IN5822 schottky diode or another 3A schottky diode.

Hi Johnpham, I would propose you this circuit published on Silicon Magazine (July 2009). This lead acid desulfator circuit supports 6V,12V and 24V lead acid batteries using a selection switch and it's based on popular 555 timer IC. Most of the pars are easily available and you will need to wind some air coils.

Hi Maleetronic, Thanks for your interest publishing a project on elab! I personally handle the project submissions and manually adding them to our repository after reviewing. So if you would like to submit your project the best way is to send me an email to webmaster @ electronics-lab.com or let me know here. After project submission i will handle the rest. Let me know, how i can help you further.

Thanks for posting in this circuit. Do you have a description also?

The author's website seems down at this moment. I am attaching WinHeist on this post or you can download it from here: http://download.cnet.com/WinHeist/3000-2067_4-75761416.html WinHeist.zip

Welcome on-board. Feel free to start a topic.

I have found a simple circuit diagram about hot wire anemometer. May be a good point to start. Look at the bottom of this page: http://newton.ex.ac.uk/teaching/CDHW/Sensors/ Also check this slides about the theory behind it: http://www.ara.bme.hu/oktatas/tantargy/NEPTUN/BMEGEATMW03/2012-2013-II/Presentation/Hot-Wire Anemometry.pdf

According to datasheet MC14046B is compatible with CD4046B and they don't mention about CD4046A

You will need to convert your AC voltage to RMS voltage then feed it to ICL7107. Datasheet has such a circuit on page 14. I attaching it here for your reference. The connection to the display is as the second attachment.

Thanks for introducing us to your project! I featured it on the blog. Good luck with your crowdfunding.