Today's Message Index:
----------------------
1. 07:12 AM - Re: Time delay on relay needed (user9253)
2. 07:36 AM - Re: Time delay on relay needed (Robert L. Nuckolls, III)
3. 12:17 PM - Re: Integration of Rotax 912iS (Eric Page)
4. 12:25 PM - Re: Time delay on relay needed (rparigoris)
5. 04:59 PM - Dual Battery Setup (Robert Schmid)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Time delay on relay needed |
Do a Google search for "capacitor time delay circuit".
One of the results of my search turned up this one with a delay of 1.5 seconds.
https://www.arrow.com/en/research-and-events/articles/make-a-simple-capacitor-transistor-timing-circuit
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=508045#508045
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Time delay on relay needed |
At 11:47 PM 10/9/2022, you wrote:
>
>Hi Group
>I am working on a project where an Arduino is completely unhappy if
>a 12 volt buzzer is connected to it's 10 amp relay.
What kind of 'buzzer'? A legacy electro-mechanical device
like we used to build in Cub Scouts?
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Integration of Rotax 912iS |
Reviving this thread from a year ago: http://forum.matronics.com/viewtopic.php?t=16777418
I've fleshed out my electrical system architecture diagram and would appreciate
another round of checks by the group.
Changes since my simplified diagram was posted last year:
- Renamed Main Bus to Airframe Bus.
- Eliminated the complicated module to switch power to the Airframe Bus, in favor
of a simple relay-and-switch arrangement.
- Added an Endurance Bus with dual feed paths.
- Added an Overvoltage Protection Module in the path from the Rotax Fuse Box X3
Pin 3 to the Battery Bus.
- Developed wiring diagrams for the Airframe and Endurance Buses.
In addition to any problems you find, I have two specific questions:
1. The Rotax 912iS Installation Manual specifies 30A fuses at the Battery Bus,
for the 12AWG wires to the Backup Battery Switch and the Fuse Box X3 Pin 3. Can/should
16AWG fusible links be used instead?
2. Is my use of fusible links acceptable for the Endurance & Airframe Bus feeders
at the Battery Bus and the hot side of the Battery Contactor?
Related links:
Previous simplified diagram: http://forum.matronics.com/download.php?id=48574
Rotax 912iS wiring diagram: http://forum.matronics.com/download.php?id=48575
LTC1696 data sheet: https://www.analog.com/media/en/technical-documentation/data-sheets/1696fb.pdf
Thanks!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=508051#508051
Attachments:
http://forums.matronics.com//files/overvoltage_protection_relay_module_rev_b_221.pdf
http://forums.matronics.com//files/electrical_architecture__kitfox_5__rotax_912is_171.pdf
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Time delay on relay needed |
Hi Joe Thank you for reply.
Bob:
The Buzzer is an electro mechanical:
https://www.amazon.com/gp/product/B000XBJ3AE/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The Arduino is powered by a 12 volt battery going through a converter to make 5
volts for the Arduino. The buzzer is using the 12 volts to operate. We put it
on a scope today and saw perturbations of the 5 volts peak to peak of between
10 and 12 volts.
We added transorbs and .1 mF ceramic capacitors across the two parallel buzzers
and also a .1 mF ceramic capacitor just before the DC to DC converter. Got peak
to peak down to 5 to 6 volts. So far it seems to be working OK.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=508052#508052
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Dual Battery Setup |
I am new to this list, but was told to come here for advice on my
electrical design for a fuel injected, electronic ignition single engine
plane. I have looked at AeroElectric design recommendations but wanted to
hear feedback on the following changes ...
- Have 2 identical, redundant, in parallel batteries instead of one full
and one backup ... I need to weight anyhow
- Have 2 identical, redundant, in parallel high pressure fuel pumps
- I run an electronic circuit breaker system called VP-X for all
components except ignition coils and injectors per SDS EFI manufacturer
recommendation
- With the VPX, I can switch all components individually in my EFIS,
measure amp usage and I have therefore very few switches on the panel
My engine start procedure is designed as follows ...
- MAIN on
- FUEL PUMP(S) on
- Fuel pressure CHECK
- Starting engine
- Oil pressure CHECK
My runup procedure is designed as follows ...
- Battery CHECK for 1, 2, both by using DPDT battery switch ... leave on
both for takeoff, 1 or 2 in cruise
- Fuel pumps CHECK for 1, 2, both by using DPDT fuel pump switch ...
leave on both for takeoff, 1 or 2 in cruise
- Coils CHECK for 1, 2, both by pulling push button circuit breakers ...
leave on both for entire flight
Duckie Wiring.pdf
<https://drive.google.com/file/d/1-IE4IEdduPQzDbu89GJGr4noviKF9AWe/view?usp
=drivesdk>
I have attached my electrical drawing, a draft so be gentle =F0=9F=98=89. P
lease take
a look but focus on my battery setup as it's different from Bob's design.
Thanks Robert
[image: photo]
*Robert Schmid*
+1 (408) 805-5450 <+1+(408)+805-5450> | robert@theschmids.org
theschmids.org
<https://www.youtube.com/channel/UCpA0wWoSCmc7end0Xrck8Kg>
<http://facebook.com/roberteschmid> <http://linkedin.com/in/roberteschmid>
<http://twitter.com/roberteschmid>
"Age is something that doesn't matter, unless you are a cheese." - Luis
Bunuel.
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|