MT3608 DC-DC Boost Converter
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- čas přidán 20. 08. 2024
- Each week I will grab a random electronic component from the vault and build a circuit - this week I look at a ubiquitous chip (the MT3608) found in cheap DC-DC boost converters...and...in the Pesky Padauk Programmer.
More info at onecircuit.blo...
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Those modules (and similarly small buck converters) pair well with microusb jacks on leads (found on AliExpress) to convert devices to work off power banks or USB wall warts.
The jack with leads means just a small round hole in the battery compartment cover, simple for anyone.
Yes, I have reached for them a few times - and it's nice to be able to make "fixed" voltage versions now with the ICs in my own configuration. Very interesting chips and surprisingly stable output voltage.
Very nice video. I do like to keep those little boosters in stock. My normal regulator now is the mp1584en based bucks. They are very good and cheap. I never can get a good ripple read on a DSO and tend to use a meter in ac mode to read it. I toy now and then on getting an old analog scope for such things and real-time type waveforms.
I would love to pick up an analog scope! From time to time I look at sites like gumtree to see if anyone is getting rid of one. My scope is only semi-useful in this situation, but I can't complain for $20!
Nice!
Hi, Great Video. However you won't be able to identify the real voltage ripple or noise or any problem with your oscilloscope, that scope's bandwidth can cover up to 200KHz at max, in order to really see the output of the chip you need an oscilloscope with a minimum of 2MHz bandwidth.
I’m always on the lookout for a cheap second hand oscilloscope. One day... 👍😀
You should get yourself a pot tool that will not slip of the pot screw as it has a covered screw blade but loved the video very good
I only buy the pots with the external winders now, e.g. lcsc.com/product-detail/Precision-Potentiometer_BOCHEN-Chengdu-Guosheng-Tech-3296X-1-501_C330441.html
I’ll look out for a covered bladed screwdriver. Might cut down the swearing a bit! 👍😀
Do you know the name of that tool/cap I didn't manage to find it
What's the maximum current draw you can get with a buck converter ? Could I run a 9v motor at full speed from 2 AA batteries ?
The datasheet of the MT3608 boost converter claims 4A! I’m not convinced...👍😀
@@onecircuit-as That sounds good, I can't see a 9v motor drawing 4A, so I think it would be fine. Thank you.
I wish this had a constant current ability. What will pair with this to do the CC that I need?
Have a look at the LM317 or LM338 in constant current configuration. It’s also on one of my earlier vids/posts! 👍😀
@@onecircuit-as Linear regulators are pretty crappy though in comparison to a PWM system from what I have been told. 2V in 12 out 2A.
I guess it would be a close reading of the datasheet to see the values. There are constant current chips as well, and in one of my videos I used a transistor arrangement. 👍😀