Dasmikro (TBS Benedini clone)

[jhamm]

Hi,
DasMikro ist limited to 5 Volt like the Benedini.
Overvoltage bring a popping and brizzling Sound.

[LukeZ]

Before you do any of this, you could take a multimeter on each device individually and see what the voltage readings are on the various pins when powered from your battery. Any power pin on one device having a voltage that doesn't match its corresponding power pin on the other device, is going to cause you a problem.

I know this is all rather confusing, and my descriptions are probably poor, but hopefully it at least gives you some idea of what to be looking for. Let us know what you discover.

This I am having a hard time grasping. The DasMikro is powered by a 5V BEC from the TCB, and the amp would ideally be powered by a 24v connection (its input voltage is 12v to 24v). The amp has 3 two pin ports, signal in, power in, and signal out (speaker). Are you saying you would expect problems if the power input of the DasMikro and the amp are different voltages, if the bottom two pins on the speaker out port on the DasMikro are used, or if the top two pins are, or something else?

Yeah, my explanation was probably not very good. I don't think it should matter if the voltage to the amp and the DasMikro are different, and indeed the manual I have shows this exact arrangement. Just that no connections between the two devices should have an interfering voltage. This shouldn't happen, but just in the off chance that for some reason your amp is passing through 24 volts to the speaker input, for example, that would fry the Mini. Your amp shouldn't do that, but I also don't know why your Mini keeps getting fried if it's not.

Also, is there anywhere online that I can get that manual you referenced? DasMikro has an installation schematic that is light on details, and their manual for their card is actually for the V2, and doesn’t have the graphic you posted. Not sure if your manual was something originally posted on Benedini’s website that is now inaccessible, or if I missed it somewhere.

The forum won't let me upload a PDF, but if you PM me your email address I'll send it to you. The manual I have is the Mini V1 from Benedini, and it dates back to 2015. I just looked and it appears he still has the manual for the V2 on his website: http://www.benedini.de/TBSMini_V2b_E.pdf

Nope so neither solution worked.

I'm sorry to hear it. The V1 manual clearly shows the Mini can be used with an external amplifier, but maybe it only worked with certain amps that Benedini sold. Or maybe the DasMikro version has modified the design somewhat (I would not be surprised if they weren't able to replicate it exactly), and it has different capabilities.

Interestingly the description for the v3 on AliExpress says only 4v-6V, whereas the DasMikro V1 description says 3.5V-12v with the caveat that it come from a receiver. So maybe it was me supplying 12v to the V1 that fried it, if it’s not really meant to handle 12v?

This information seems to be taken from the manual for the V1, which says the same thing (3.5 – 12V from receiver). That implies it could handle it, but I don't know of any receivers that output 12 volts, and it seems to fry yours, so for whatever reason it seems best to keep the Mini voltage to 5v.