Matronics Email Lists

I have an all electric engine (Subaru) and put locking switches on both the main and aux ignitions and fuel pumps. Solves the inadvertent bumping issue.
All of my switches mounted low, and Up=On, so ...

The DPDT switch is mounted in the panel (in my case), along with the red and green LEDs.
For the Arduino setup, I have the relay and the current sensing module in a box behind the panel, and the ardu ...

There is no date on your circuit diagram, but my PDF has a file date of June 2010. Time flies when you are having fun Smile

Dennis Glaeser (original requester for this circuit).

I was the requester for that design.
I built it, tested it, and used it for the last few years. Works perfectly!
I recently upgraded to an MT prop, so I sold the IVO along with the current limi ...

My 'old-timers disease' must be kicking in. When I looked at your diagram, for some reason that symbol seemed backwards. But I looked at my own diagrams and they are the same as yours!

iDennis

Bob and Mike,

I have been using Bob’s circuit on my IVO and it works flawlessly. It’s a simple and foolproof way to protect the gear train that drives the blade pitch mechanism.

W ...

That type of circuit, especially at the low voltage and current levels, is
not a spark hazard.
There are thousands of planes that have been flying for many years with this
type of fuel level sender ...

Here are pictures of my IVO circuit. I soldered the parts to the 'wrong' side of the board so that I didn't have to worry about unintended connections on the back side. The board looked very nice be ...

I had originally set up my access that way (years ago, when I started building), but the volume of email was daunting, especially when subscribed to multiple lists, and I wanted to see everything of c ...

I currently use the Web email list browser - no attachments. I'll have to upgrade to the BBS forum (but I like the other, simpler, user interface better) I'm doing this from the BBS forum as a test. ...

An implementation question: Are the values of R105 and R107 (the 1K
resistors in series with the LEDs) critical? The reason I ask is that I
have a couple of ready to mount LEDs that already have re ...

I corrected my wiring error and the circuit works perfectly! The amber LED
comes on when the current hits the limit (about 9A), and stays on as long as
the switch is held, but current to the motor ...

I discovered a wiring error in my circuit. Hopefully tomorrow I can fix it
and re-test.

Dennis

Bob,
I built the 'Prop Pitch Current Limiter and Electronic CB' circuit last week
and tested it today.
It works as expected, with one minor difficulty - the Amber LED doesn't come
on! It flashes ...

The instructions do say not to shorten the wires.
From a support standpoint, it makes sense for IVO to specify that no changes
be made to the system they know works as advertised.
From a physics s ...

The mosfet does get rather warm, but only if the switch is held longer than
normal.

I've had a lot of folks become concerned with transistors
that got "rather warm" but without ...

I made the original circuit that Bob posted. I got all the parts from
DigiKey, including the IRFP 3703.
I was finally able to test that circuit today. It worked exactly as
predicted. With only t ...

Joe Gores not only suggested using a reed switch to sense my prop end of travel, he even gave me one to try! Today I went out and played a bit. I found that 3 winds of 18AWG causes the switch to clo ...

See my comments after the ----->'s below...

RE: RE: Designing a circuit question
From: Mike Welch

I REALLY like your circuit design regarding the IvoProp motor. In fact I'm
planning o ...

Doug,

It may be clear to you, but you've got to do better than that to be clear to
me Smile

I understand the concept, but need a circuit diagram, and which $1
microprocessor to use.
I agree that ...