Mailing List flyrotary@lancaironline.net Message #65946
From: Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: EC3 hardware notes
Date: Thu, 25 Jun 2020 06:48:12 +0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
You RV guys and your allergy to glass and resin, being dragged into the 21Century kicking and screaming!
I could easily be lured towards the dark side  of clean prepunched Al panels and no dust! Suck it up! Ha.

Steve Izett


> On 25 Jun 2020, at 1:38 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>
> Cool. Probably won't beat you to it. Still working on the canopy bow. Fiberglass - yuk!
>
> Finn
>
> On 6/24/2020 8:37 AM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi Finn
>>
>> 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’ll see about swapping in the EC3 and see if she runs!
>> I’ll let you know how we go.
>>
>> Thanks Finn
>>
>> Steve
>>
>>> On 24 Jun 2020, at 7:52 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>>>
>>> Hi Finn
>>>
>>> ok. Now I recall you mentioning this recently but misunderstood.
>>> Sorry I haven’t read all your emails carefully enough having done the work with tracy.
>>>
>>> Good news for this EC3, that being the case.
>>> I’ll see if I have enough time tonight to reprogram the chips as I’m headed down tomorrow and could test the new code.
>>>
>>> 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!
>>>
>>> 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 = 3.4v. If I use the 3.3v it would clip the signal at 3.3+~0.7=4v. My analog amp knowledge is woefully lacking these days
>>> but I thought this extra 0.6v would be fine for Tracy’s conditioning circuits.
>>> Appreciate any analog insights you can offer re those signal conditioning amplifier/buffers?
>>>
>>> Cheers
>>>
>>> Steve Izett
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>> On 24 Jun 2020, at 6:27 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>
>>>> Steve,
>>>>
>>>> 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:
>>>>
>>>> "Here it is:
>>>> https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?usp=sharing
>>>> It's EC3closedloop.zip."
>>>>
>>>> Finn
>>>>
>>>> On 6/23/2020 6:23 PM, Stephen Izett stephen.izett@gmail.com wrote:
>>>>> Hi Finn
>>>>>
>>>>> Sorry, I misunderstood. Too many things on my mind at work at present.
>>>>>
>>>>> When I get to the EC3 mods I’ll:
>>>>> a. Test the EC3 with new clamped CAS input. If no change and it still runs like a dog on two legs  -
>>>>> b. I’ll reprogram the chips with your hex code and retest.
>>>>>
>>>>> 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’t trust?
>>>>> Cleaning is $40 each. New ones are $20 each!
>>>>>
>>>>> Cheers
>>>>>
>>>>> Steve Izett
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> On 24 Jun 2020, at 12:04 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>>>
>>>>>> Oh, you already reprogrammed them with the fixed code I uploaded?
>>>>>>
>>>>>> Finn
>>>>>>
>>>>>> On 6/23/2020 10:44 AM, Stephen Izett stephen.izett@gmail.com wrote:
>>>>>>> Thanks Finn.
>>>>>>>
>>>>>>> I’ll 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.
>>>>>>>
>>>>>>> Steve
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> On 23 Jun 2020, at 9:56 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>>>>>
>>>>>>>> Attached is an excerpt of the EC3 CAS input conditioning circuit without added clamping circuit and with.
>>>>>>>>
>>>>>>>> Finn
>>>>>>>>
>>>>>>>> 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’ll mod the EC3 and see if that is the problem.
>>>>>>>>>
>>>>>>>>> Cheers
>>>>>>>>>
>>>>>>>>> Steve Izett
>>>>>>>> <EC3 CAS input with clamp.pdf><EC3 CAS input.pdf>--
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