Now, with the advent of specialized microcircuits, voltage converters have become very effective and have minimal energy loss when converting one voltage value to another. Now we are going to talk about a fairly common module: a step-up converter, which can output voltage up to 28 V, with a maximum output current of 2 A. The best thing is that the converter’s circuit board is very compact and, thanks to its high efficiency, heats up to a minimum therefore, you do not need to use a large radiator.
All the radio elements for this module (MT3608) are components for surface mounting, except for a tuning resistor of type 3296. It has very fine adjustment, especially for its rating (33 kOhm). The Chinese have connected it a little incorrectly, so the adjustment is carried out only at eight revolutions. In order to correct this misunderstanding, you just need to connect the two terminals of the resistor, as shown in the photo below: now all 23 turns regulate the output voltage.
From 2 to 28 V can be input. The core of the MT3608 module is a miniature microcircuit in the sot26-6 MT3608 package, which has short-circuit protection, but this device can be damaged from reverse polarity. The device operates at a frequency of about 1.2 MHz, the maximum efficiency of 93%.
You can use this voltage converter board in a variety of ways, for example, to increase the voltage up to 5 V from lithium-ion batteries to charge different gadgets, to increase from the same batteries an additional 12 V for metal detector. Or, say, 5V conversion from a USB port to power an LED strip.
Cost: ~ 28