Eiechip MT3608 Boost Converter DC-DC Step Up Power Module with Micro USB Input, 2V-24V to 5V-28V Adjustable Voltage Regulator, 2A Output Power Supply Board for DIY Electronics Projects (Pack of 10)

Great Product, Great price and as important Great Company to Deal with (package got rough handling and three ferrite inductors were broken and issue was graciously handled by Putian Xiuyu Duoyu Trading Co. Ltd. JUST REMEMBER TO TURN THE POT 15 CW 'LAPS' before powering. Great device, tried in several circuit ideas. Already packaged one to convert 110V led gooseneck lamp to battery operation for safety (no cords) Lamp is mounted to mini parts sled on table saw. Hacked LED series strings for multiple 24V strings and added 1/8 W resistors to lamp The Boost converter ran without hesitation or much heat at 24V 1A until battery cuttoff engaged, about 1.9 hrs. More time than I need to spend on saw at one session. LEDS did not flicker or show any light artifacts from boost converter (used as received - directly connected to battery manager module. Because of low heat, just used board attached to enclosure as heat sink. Easy Peasy. Bob

I purchased these to modify a small LED motion light that originally uses 4 AAA batteries for a total of 6V brand new to use 18650 cells and up the voltage to 6.3V. With a single cell the light worked properly but was slightly dimmer compared to when using 4 brand new AAA batteries due to the lower voltage, and with using 2 18650's in series the brightness was excellent but made the LED's a little hotter than normal due to the higher voltage. So that's where the Step Up module comes in and does an excellent job of providing stable voltage. In addition to working properly, with the micro usb port I could just power the light with a usb power source if I wanted to which is nice to have.

I am specifically using these to step up 3v to either 5v (for USB devices) or 12v (for a strip of LEDs). I've set up two so far, and they work pretty well. The pot is very sensitive, so that you can bump it up by tenths of a volt or less. The pads are pretty easy to solder to. The power delivery is relatively clean, I have some flicker on the LED strip, but that seems to resolve itself fairly rapidly - for sensitive applications you might want to run through a capacitor to clean things up a bit. The unit is moderately efficient, but becomes quite warm - when converting from 2xAAA Lithium batteries (3v) to 12v, with an approximate draw of 200mA the converter (both the top of the transformer and bottom of the board) temps at about 116F within three minutes or so of operation. Pretty warm, warmer than I would typically like. I might try hooking up a 9v instead to see if this knocks the temps down a bit, or if that fails, adding a thermistor to mitigate the risk of a thermal event. Would recommend for general experimentation though.

Did quick test of all 10. I did all my tests with 5v in, 12v out. Used oscilloscope to examine the output. First into 165ohm load for about 73mA. All worked fine with maybe 40mv of switching noise at 1.2Mhz. I picked one at random to check further. Using a 20ohm load for 600mA, device would occasionally cutout for a fraction of a second. Chip very hot to the touch. Although 600mA and 12V is shown on the datasheet as permitted. It is at the high end. I switched to a 30ohm load for 400mA and seems OK. The chip is hot to the touch. The datasheet goes up to 800mA for 12V out so the product description is misleading when it says 2A. Probably the most amps out is the datasheet curve that shows for 13V in and 18V out - it goes to 1.7A. For 400mA, there was many volts of ripple on the output. Adding 10uf capacitor across the output fixed that problem. So all in all, these seem fine but probably stay below the middle of the datasheet ranges of power output for best results.

I bought these about 3 months ago and followed the tips on turning the pot several times clockwise, then with a DMM, turn the pot counter clockwise until the desired voltage reads. I got these for various uses, but mostly to step up the voltage to a 12vdc 120mm fan (from 5vdc) on a RPI custom case I repurposed out of a PC power supply. They work PERFECTLY! Granted, PC fans do not draw hardly any current, so I did not expect the module to get hot, and it doesn't. I used the module to supply 9vdc from 5vdc. 12VDC spun the fan too fast and I did not need that amount of air flow. This is the simplest use of this module of course. I have not run it through anything more demanding yet, but it was a cheap and reliable fix for a design issue where a component needed more voltage than the project's supply voltage. I will buy more. None of the 10 I received failed at all.

Just supplying power (2-12V) to the devices and checking the output voltage revealed 5 of the 10 failed (they seemed to suffer from some kind of internal short). That is just multi-meter testing - no sustained load on the output. Setting the output voltage on the 5 remaining units at about 27.5V (where I will need it for my application) I put a 21 Ohm load on them and measured the output voltage and current for one minute. Two more units failed, and the three remaining would only put out 1A because the output voltage had sagged from 27.5V down to 21V. Those three remaining units were somewhat functional, but couldn't perform up to the advertised specs of 28V and 2A. If you want to call that a 70% failure rate or a 100% failure rate, that is up to you. Even if I could use these remaining units I just wouldn't trust them to keep working given the poor quality control.

Set one of these to test for switching noise, (330uF Aluminum + 1Kohm output load at power-up) adjusted to 25VDC output from a regulated Linear supply set to 13.5 VDC. Was surprised they only put out about 10mV P-P switching noise which is very good, efficiency of ~93% with this setup. However when I plugged in a 120uF 50VDC Tantalum capacitor across this setup while powered up, the converter blew out and became a dead short. Repeated this test with a second inverter and it blew out and shorted too. They are claimed to be rated for 2 amps output, which I seriously doubt, and I intended to use them to run a 25VDC 500mA load. They don't have a good surge handling capability and I can't trust them for the application I had in mind.

I was looking for a voltage boost converter to step 5 volts from a USB port up to 12 volts to drive LED light strip tape. These work perfect! The best part is that they have a micro-USB socket already on the board, which makes it very easy to plug in for power in my projects. The boards are very small and fit easily into my designs. The shipping was extremely fast, and I had them in a couple days. I got the 10-packs, and they came in a very nice little clam-shell plastic case, with each board individually sealed in an anti-static bag. I will definitely buy more in the future!

Good

Funciona muy bien, su salida muy estable!

Just make sure to rotate the potentiometer before powering on. If you do that, then they work flawlessly! Great product, consistent and well built.

Work great for my experiments.

It really works, it's very interesting. Good to power basic electronics such as fans. Do not use it with sensitive electronics, these devices tend to create interference and undesirable spikes, not suited for sensitive components such as amplificators or any audio equipment. Beware to use a potentiometer when pairing something with it, you surely don't want to fry something.