DROK® DC Buck Boost Converter Module Power Supply 80W 12V 24V Voltage Regulator Input 7-32V Output 1-30V Adjustable Voltage Converter Constant Volt Amp for Battery Charging Solar Energy LED Driver

Great unit, can voltage limit, current limit, buck or boost. ONLY thing I don't really like is that it has an UVLO that seems to have a limit of about 4.2 volts. But, really, why would you boost below this? only thing is if you were using an RPI off a 5 volt supply, the cable resistance could come close to dropping the input vilathe this low.

I received the Buck converter board before the specified delivery date. I connected the board to a 12V DC power supply and checked the output voltage and current. Both were adjustable upward as advertised. I brought the output voltage up to 30V DC and monitored the increase using my multi meter. I have no complaints with DROK or the quality of the product that I purchased.

My converter was a dud as received which sucked because I needed it which is why I used next day air. I contacted DROK and although I think they mean well they really offer no help. I found one of the 500K trimmers was faulty and there was a short or something as the fault light was always on. I changed the pot but the unit just never worked. I can't return it since I changed the pot so I guess sometimes you just get screwed. I have some other DROK items that work great. Hit or miss with these guys sometimes this time was a miss.

Good

Love it, power Is clean. However, it does have a touch too much overhead so my lower-powered oscillations never got through the board to the load even though enough power was there (7-25V, 0.02-2A pulses; load works directly powered but not through board). Think capacitors so large that they kept absorbing my input pulses so ended up going with a smaller unit. Better matched to a more constant power input.

145 F is the max optimal temp for this board not to start power loss do to overheating. Bought 2 of these both failed the fuse socket of one burnt out after about 60 seconds with an 8.5 amp input converting 13.8 volts to 16.4 to get some 4S 10P battery packs charged back up. The other failed with the fault light staying on and no output voltage at all when it really should not have done that considering i used it to charge the same packs at least 3 times before and as you can see from the pics i did an extreme effort to keep the temp down on them. AH well back to the drawing board

Worked very well

I am still waiting for a reply from Drok regarding a custom buck-boost converter,