X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=RZTu9Glv c=1 sm=1 tr=0 a=9dl6UD1qclNxj5Zg0DxZBA==:117 a=78ZBOurIltGArAP38PhPfg==:17 a=nTHF0DUjJn0A:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=o1OHuDzbAAAA:8 a=7g1VtSJxAAAA:8 a=22ttcOq6noz49ONmrrEA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=jThZ7_-JAAAA:8 a=MHv_r1mK5HeyqV6S:21 a=frz4AuCg-hUA:10 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=grOzbf7U_OpcSX4AJOnl:22 a=NVbvhy2gKIdozzgvQOKv:22 From: "Bobby J. Hughes bhughes@qnsi.net" Received: from us-smtp-delivery-128.mimecast.com ([63.128.21.128] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 406524 for flyrotary@lancaironline.net; Tue, 23 Jun 2020 07:16:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=63.128.21.128; envelope-from=bhughes@qnsi.net Received: from mail.qnsi.net (207-91-159-27.nstci.net [207.91.159.27]) by relay.mimecast.com with ESMTP id us-mta-156-can5p-iWNjSz2EQzPYw0Eg-1; Tue, 23 Jun 2020 07:16:36 -0400 X-MC-Unique: can5p-iWNjSz2EQzPYw0Eg-1 Received: from 10.0.0.5 ([10.0.0.5]) by qnsi-mail.qnsi.net ([10.0.0.5]) with Microsoft Exchange Server HTTP-DAV ; Tue, 23 Jun 2020 11:16:35 +0000 MIME-Version: 1.0 (1.0) thread-topic: [FlyRotary] Re: EC3 hardware notes thread-index: AdZJT8G5vNZbfZq6T4CTzHAR0QLrkw== Subject: Re: [FlyRotary] Re: EC3 hardware notes Date: Tue, 23 Jun 2020 06:16:35 -0500 Message-ID: <4337739E-F13D-4BAE-8844-256CE552F8F1@qnsi.net> References: In-Reply-To: To: "Rotary motors in 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It= =E2=80=99s external in the wiring near the EC2 connector. It=E2=80=99s not = compatible with the EC3. Engine would not start.

Bobby

Sent from my iPad

> On Jun 22, 2020, at 9:00 PM, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net= > wrote:
>
> =EF=BB=BFI had this circuit from somewhere
> <Renesis CAS Zener Circuit.pdf>
>
> Steve Izett
>
>> On 23 Jun 2020, at 9:22 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.ne= t> wrote:
>>
>> Just for the record.
>> <ommkelgblomchfkc.jpg>
>> The 1K resistor and the two 2.7V zener diodes are the CAS input cl= amping circuit.
>>
>> The rest is for redundant +5V to control panel (mixture voltage be= ing the critical one).
>> Vcc3 is J2 pin1 (+5V to control panel).
>> I just used BAX16 diodes because I had them. Any 100mA (16V revers= e voltage or more) diode will do.
>> LM78L05 flat side down. Left pin is output. Center pin is ground a= nd right pin is input.
>>
>> <jjfkkebmdbnhneko.jpg>
>> If you want to secure components against vibration make sure you u= se Natural Cure Sealant (non -acidic)!
>> I'm using Dowsil 737 RTV sealant.
>> The auto parts store RTV is acidic and you don't want your circuit= board damaged (etched) by that.
>>
>> Finn
>>
>>> On 6/17/2020 6:57 PM, Finn Lassen finn.lassen@verizon.net wrote:
>>> In addition to the CAS input clamping circuit, Tracy also reco= mmends shorting pins 1 and 3 of D18. The voltage drop across the diode to t= he PCM module causes slightly lower mixture and program voltage than the so= ftware was programmed for.
>>>
>>> However, if you are powering A and B controllers separately (e= .g. separate fuses or busses), I have a better idea.
>>> 1) Remove the D18 diodes (just below C45 which they feed). >>> 2) Add a LM78L05 (or similar) voltage regulator. After each (A= and B) of the power (L1 and L2) input coils (+ on the big C20 and C21 capa= citors) feed the input of the LM78L05 with a diode. Output of it goes to J2= pin 2 (or + on C45).
>>>
>>> Same principle as powering the PCM from either of the 5V regul= ators on the EC3 board, but the 0.7V diode drop now happens before the regu= lator, not after the 5V.
>>>
>>> CAS input clamping circuit:
>>> 1) A 1K resistor between J2-5 and J2-15 (CAS input and ground)= .
>>> 2) Two 2.7V zener diodes in series, arrows or striped ends (an= odes) connected together. The non-striped ends (cathodes) to J2-5 and J2-15= respectively (CAS input and ground). (Basically in parallel with the 1K re= sistor). If you got the polarity of the zener diodes correct you should see= the signal from the CAS sensor clamped to no more than 0.7 + 2.7 =3D +-3.4= volts on an oscilloscope.
>>>
>>> I now have two bad chips (does not respond to reading or progr= amming attempts -- do "work" in the EC3). The chip pins used to p= rogram the chip go to the Mode switch on the PCM. J2 pins 22 and 24. One mi= ght consider protection diodes for those pins. Oddly the pins continue work= ing for Mode switch input, just not for re-programming the chip.
>>>
>>> The EC3 board was designed for in-circuit chip re-programming = (set mode switch to zero or disconnect J2). Vpp/MasterClear are on J2 pin 1= 1 (for A) and pin 1 (for B). PGC on pin 22 and PGD on pin 24. However, Trac= y found that the combined capacitance of the programming pins of two chips = made in circuit programming unreliable. I wonder if it might work if one co= uld control the speed with which it communicates with the chip?
>>>
>>> Finn
>>>
>>>
>>> --
>>> Homepage: http://www.flyrotary.com/
>>> Archive and UnSub: http://mail.lancaironline.n= et:81/lists/flyrotary/List.html
>>>
>>
>>
>
> --
> Homepage: http= ://www.flyrotary.com
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