MCB-E ("blue box") Issues, Post up your experiences

[Tom]

Sorry, no photo and the box is buried in the OV-10 now. I looked at the circuit board traces it was soldered to but couldn't tell what it would affect. The switch itself was like the attachment.

This is an update to the MCB-E (Blue Box). The MCB-E always had a sequencer built into it with a built in delay for the gear doors. This is not ideal since some planes don't need the delay for gear doors. It depends if the plane has spring operated gear doors or servo operated gear doors. The delay is only needed for servo operated gear doors. The micro switch turn the delay on/off depending on servo operated vs spring operated gear doors. Note, there have been quite a few other updates over the years. This is the latest.

[JDill]

This is an update to the MCB-E (Blue Box). The MCB-E always had a sequencer built into it with a built in delay for the gear doors. This is not ideal since some planes don't need the delay for gear doors. It depends if the plane has spring operated gear doors or servo operated gear doors. The delay is only needed for servo operated gear doors. The micro switch turn the delay on/off depending on servo operated vs spring operated gear doors. Note, there have been quite a few other updates over the years. This is the latest.

Aaaahhhh, that makes sense now. I noticed in some Bronco videos that there was a delay in gear actuation and expected it with mine, but there wasn't one. Thank you, thank you, for solving this mystery for us 😀

[StevenR]

Flying the 90mm F22 with stock blue box with over 20 flights and no issue, also have about 8 freewing models with blue box and no issues with them either.
I even added some lights to the F22 plugged into blue box with no issues. (Just my 2 cents)

[Olivier_]

! IMPORTANT
It took me 1 hour to understand why the takeoff LEDs weren't lighting up with my Spektrum ESC. Spektrum ESCs only deliver 6 volts or 7.2 volts and Freewing Control Box MCB-E only accepts 5 volts to light the takeoff LEDs.
I just did the test with an ESC that delivers 5 volts and it works !

Take the test, you’ll see !
Otherwise tell me your solution,
regards 😉

[Blackdog]

Tyumen

[xviper]

Tyumen

What does this mean?

[Blackdog]

Oops and oops

[Johnboy384]

Having a retract failure.Triple checked connections and even tried a second receiver and a servo tester.
No luck at all.
Would this be a 'blue box failure'?
Tried two receivers, two transmitters.
Only way I can run the gear is to bypass the blue box.
Can anyone help?
Thanks in advance, John.

[Evan D]

Could be…

[kallend]

Having a retract failure.Triple checked connections and even tried a second receiver and a servo tester.
No luck at all.
Would this be a 'blue box failure'?
Tried two receivers, two transmitters.
Only way I can run the gear is to bypass the blue box.
Can anyone help?
Thanks in advance, John.

So the retracts only work when you bypass the blue box.

Seems like it's giving you a pretty good hint that the blue box is the problem.

Is there any reason you can't just leave it bypassed?

[Johnboy384]

So the retracts only work when you bypass the blue box.

Seems like it's giving you a pretty good hint that the blue box is the problem.

Is there any reason you can't just leave it bypassed?

Thanks Kallend,

From a search of blue box issues they seem various and ongoing. Will delete the box and replace it with Y-leads.
My first and last blue box experience.

=)

J

[kallend]

Thanks Kallend,

From a search of blue box issues they seem various and ongoing. Will delete the box and replace it with Y-leads.
My first and last blue box experience.

=)

J

I've done that with quite a few of my models.

[Evan D]

I’ve never had a MCBe issue but bypass some things in many planes to be able to get set ups I want. While I know there have definitely been BB failures most seem to be user error, over voltage, connectors plugged in wrong slots or incorrectly.