From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.216.50; envelope-from=stephen.izett@gmail.com
Content-Type: text/plain;
	charset=utf-8
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\))
Subject: Re: [FlyRotary] Re: EC3 hardware notes
Date: Fri, 26 Jun 2020 10:49:54 +0800
References: <list-419222@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-419222@logan.com>
Message-Id: <EF7FB46D-2492-4B4D-9CF2-0A036F86EE45@gmail.com>

Hi Finn

Great news.=20
Look forward to getting the EC3 tested.=20
Hear what your saying re static.

Steve


> On 26 Jun 2020, at 8:15 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Well, I dragged it outside and ran it today. (RX-8 Renesis, LS2 coils, =
Large secondary injectors)
>=20
> Like night and day! Smooth as silk.
>=20
> Ran it up to 5,800 RPM w/o prop.
> Mounted my RV-3B prop and ran it up to about 3,800 RPM.
> Don't know how I'm going to run it at higher RPMs until I get canopy =
back on, seats in and brakes connected. Too much wind from the prop.
> So it may be a while until I can run it at full power while I finish =
up some fuselage items, put on the wings, etc.
>=20
> Oh, the A controller chip does not have working inputs for Mode =
selector switch and Store/Primer switch. So I first ran it on B, =
thinking A wasn't working. But engine continued running when switching =
over to A.  I'm amazed how weak the inputs on those chips are.  =
(Actually I borrowed them from Tracy -- used -- so may have been damaged =
in a less humid environment.)  Still, I have two otherwise brand new =
chips I can't reprogram. So either the Vpp input or the PGD output must =
be damaged.
> In addition to taking precautions against static electricity when =
handling the chips, it probably would not be a bad idea to add static =
protection (for example 5.1V zeners to ground) on the 4 mode switch =
inputs, Store input, etc.
> J2 pins 1, 7, 9, 10, 11, 16, 21, 22, 23 and 24 all go directly to the =
CPU chips. Some have 10K pull-up resistors, some a capacitor to ground, =
but all susceptible to damage by static electricity, a stray 12V wire, =
etc.  when not connected to the PCM (program and control module). Maybe =
I'm just too charged up :)
>=20
> Finn
>=20
> On 6/25/2020 6:27 PM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi Finn
>>=20
>> When I went to the hangar yesterday, unfortunately I found that one =
of the solder lugs (not the joint, but the lug itself) on the EC2 to EC3 =
adapter db37 had broken off which is very disconcerting.
>> It was one of the secondary injector feeds, so not responsible for =
the rough running. I now need to replace/resolder it with a new female =
db37. Very annoying!
>> Doh! As I=E2=80=99m writing this, I just realised I still could have =
tested the code with one of the secondaries not connected.
>> I=E2=80=99m busy with my kids and grandkids up from the farm this =
weekend so its not going to happen for another week at least.
>>=20
>> Steve Izett
>>=20
>>=20
>>> On 25 Jun 2020, at 1:38 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>=20
>>> Cool. Probably won't beat you to it. Still working on the canopy =
bow. Fiberglass - yuk!
>>>=20
>>> Finn
>>>=20
>>> On 6/24/2020 8:37 AM, Stephen Izett stephen.izett@gmail.com wrote:
>>>> Hi Finn
>>>>=20
>>>> Both A & B chips erased, verified blank, reprogrammed (EC3CL8.HEX =
17/06/2020), verified and checked program and config memory.
>>>> All looks right.
>>>> So after flying tomorrow on the EC2, I=E2=80=99ll see about =
swapping in the EC3 and see if she runs!
>>>> I=E2=80=99ll let you know how we go.
>>>>=20
>>>> Thanks Finn
>>>>=20
>>>> Steve
>>>>=20
>>>>> On 24 Jun 2020, at 7:52 pm, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>>>>=20
>>>>> Hi Finn
>>>>>=20
>>>>> ok. Now I recall you mentioning this recently but misunderstood.
>>>>> Sorry I haven=E2=80=99t read all your emails carefully enough =
having done the work with tracy.
>>>>>=20
>>>>> Good news for this EC3, that being the case.
>>>>> I=E2=80=99ll see if I have enough time tonight to reprogram the =
chips as I=E2=80=99m headed down tomorrow and could test the new code.
>>>>>=20
>>>>> I tried to pick up some 2.7v zeners today, but they only had 3.3v =
in single units and 2.7v by the 1000!
>>>>>=20
>>>>> So the full wave clipping circuit you supplied should clip the CAS =
signal to Zener voltage + forward volt drop of the other zener.
>>>>> 2.7+~0.7 =3D 3.4v. If I use the 3.3v it would clip the signal at =
3.3+~0.7=3D4v. My analog amp knowledge is woefully lacking these days
>>>>> but I thought this extra 0.6v would be fine for Tracy=E2=80=99s =
conditioning circuits.
>>>>> Appreciate any analog insights you can offer re those signal =
conditioning amplifier/buffers?
>>>>>=20
>>>>> Cheers
>>>>>=20
>>>>> Steve Izett
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>> On 24 Jun 2020, at 6:27 pm, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>>>=20
>>>>>> Steve,
>>>>>>=20
>>>>>> It will NOT run programmed for Renesis and LS2 coils unless you =
reprogram the chips using the source code I uploaded on the 17th of =
June:
>>>>>>=20
>>>>>> "Here it is:
>>>>>> =
https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?u=
sp=3Dsharing
>>>>>> It's EC3closedloop.zip."
>>>>>>=20
>>>>>> Finn
>>>>>>=20
>>>>>> On 6/23/2020 6:23 PM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>> Hi Finn
>>>>>>>=20
>>>>>>> Sorry, I misunderstood. Too many things on my mind at work at =
present.
>>>>>>>=20
>>>>>>> When I get to the EC3 mods I=E2=80=99ll:
>>>>>>> a. Test the EC3 with new clamped CAS input. If no change and it =
still runs like a dog on two legs  -
>>>>>>> b. I=E2=80=99ll reprogram the chips with your hex code and =
retest.
>>>>>>>=20
>>>>>>> On another note:
>>>>>>> Still trying to decide on whether to pay to have my 4 blue =
secondary injectors cleaned and tested or
>>>>>>> buy new injectors, New ones are cheaper on eBay but are they =
knock offs that I shouldn=E2=80=99t trust?
>>>>>>> Cleaning is $40 each. New ones are $20 each!
>>>>>>>=20
>>>>>>> Cheers
>>>>>>>=20
>>>>>>> Steve Izett
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>>> On 24 Jun 2020, at 12:04 am, Finn Lassen =
finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>>>>>=20
>>>>>>>> Oh, you already reprogrammed them with the fixed code I =
uploaded?
>>>>>>>>=20
>>>>>>>> Finn
>>>>>>>>=20
>>>>>>>> On 6/23/2020 10:44 AM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>>>> Thanks Finn.
>>>>>>>>>=20
>>>>>>>>> I=E2=80=99ll add the 2 zeners to the EC3 and test it.
>>>>>>>>> I thought the reprogramming of the chips was right.
>>>>>>>>> MPLABS reported them to be good.
>>>>>>>>>=20
>>>>>>>>> Steve
>>>>>>>>>=20
>>>>>>>>>=20
>>>>>>>>>=20
>>>>>>>>>=20
>>>>>>>>>> On 23 Jun 2020, at 9:56 pm, Finn Lassen =
finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>>>>>>>=20
>>>>>>>>>> Attached is an excerpt of the EC3 CAS input conditioning =
circuit without added clamping circuit and with.
>>>>>>>>>>=20
>>>>>>>>>> Finn
>>>>>>>>>>=20
>>>>>>>>>> On 6/22/2020 10:02 PM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>>>>>> Thanks Finn. Did you previously give us a the circuit? Do =
you have a sketch of it?
>>>>>>>>>>> I=E2=80=99ll mod the EC3 and see if that is the problem.
>>>>>>>>>>>=20
>>>>>>>>>>> Cheers
>>>>>>>>>>>=20
>>>>>>>>>>> Steve Izett
>>>>>>>>>> <EC3 CAS input with clamp.pdf><EC3 CAS input.pdf>--
>>>>>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>>>>>> --
>>>>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>>>>>>=20
>>>>>>>> --
>>>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>>>> --
>>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>>>>=20
>>>>>> ---
>>>>>> This email has been checked for viruses by Avast antivirus =
software.
>>>>>> https://www.avast.com/antivirus
>>>>>>=20
>>>>>>=20
>>>>>> --
>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>> --
>>>>> Homepage:  http://www.flyrotary.com/
>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>> --
>>>> Homepage:  http://www.flyrotary.com/
>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>=20
>>>=20
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>=20
>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html