I have 2 of these and have worked fine up until today. Now the power out red led is flashing and not much else is going on, does anyone know what this means?
This chip is used in many different versions of a DC-DC converter module, so you should provide a link to the exact product that you have.
There is no flashing function as part of the chip, but if it is overloaded it will shut down, and may attempt to restart, which could cause a flashing of the power LED. Is any component getting very hot?
The components most likely to fail simply due to age are the electrolytic capacitors, especially if they are operating close to their rated voltage. Check carefully for a bulging top, which indicates gassing.
Measuring the voltage at relevant points in the circuit, particularly if you adjust the output voltage, will also help to reveal the likely problem.
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I think you are talking about this one: 20W Adjustable DC-DC Buck Converter with Digital Display | DFRobot DFR0379 | Core Electronics Australia
Please check your power supply. This board supports an input voltage of 4.0 ~ 40V. Any voltage outside this range will result in malfunctioning of the board. * The output power is 20W. For more than 15W a heatsink is recommended. Pay attention to this matter too.
You can also make an LM2596 board by yourself. Following is a design that you can try: Adjustable Switching Power Supply Using LM2576 [Buck Converter, CC-CV] - Share Project - PCBWay
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