As said in the thread for the aquaero powerbooster we will also offer a small PCB which will allow you to boost the power of the fan channels of an aquaero, aquastream XT or any other device with a fan output.
The powerbooster can deliver up to 3.5A which is more than enough for several powerful fans or a Laing pump.
The used operational amplifier L165 has a small downside: it has a powerdrop of 1.5 to 2.0V so you will end up with 10.5 to 10V. Since we wanted to have a very simple solution we will have to live with that and also think it's OK because who really runs fans at full speed for example? In this case you won't need it and can connect them directly to the PSU
Usage is simple: you connect a fan output with the input connector, the PCB will boost the incoming signal (-1.5 to 2.0V) and puts it out on the second connector. Of course the tacho singal will be forwarded.
We have tested it also with a Laing DDC-1T/Plus and it worked
We know that there have been a few other booster PCBs by users and used some ideas for testing but either they were already to complex or the simpler ones were generating a massive swinging which leads to an unnecessary waste of power and thermal problems. That problem was easy to spot with an oscilloscope which I think these users don't own to see that problem theirself.
Our PCB is using a filter to avoid problems with swinging and to ensure a better efficiency.
The poweramp will be available for around 15.00 EUR (~18.00 USD w/o VAT) and we will also offer a DIY kit for a cheaper price. Good soldering knowledge is recommend since there are also very small SMD parts.
The photo below shows a handmade prototype. The final variant will be manufactured professional. The powerbooster measures 48 x 22mm at a height of 27mm.
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