The Association of Model Submariners.

Would you like to react to this message? Create an account in a few clicks or log in to continue.

* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



Join the AMS - Registered Forum users can become members of the AMS and it's free ...... To join send an email with your name , address and phone number to amstreasure@googlemail.com


For a guide to past events see the "Shows and Events" section.

....


,

"***"

Who is online?

In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None


Most users ever online was 180 on Tue Nov 05, 2019 6:03 am

Latest topics

» 915mhz / 868mhz as a viable frequency for submarines.
Pitch Controllers EmptyWed Feb 01, 2023 8:15 am by maxx78

» 27Mhz - Radio Ideas
Pitch Controllers EmptyTue Jan 31, 2023 8:39 am by david f

» Not the hobby I expected :)
Pitch Controllers EmptyMon Dec 12, 2022 9:07 pm by cat

» Upholder build instructions
Pitch Controllers EmptySun Dec 11, 2022 5:57 am by lenD

» Antennas - Underwater
Pitch Controllers EmptyFri Dec 09, 2022 9:50 am by david f

» Single Channel Remote for submarines
Pitch Controllers EmptyFri Dec 02, 2022 2:59 pm by david f

» self contained compressor and solenoid valve for bladder systems.
Pitch Controllers EmptyThu Nov 24, 2022 5:58 pm by geofrancis

» New to this forum and first submarine
Pitch Controllers EmptyFri Oct 14, 2022 6:15 pm by Tom(ADMIN)

» USS Bluefish
Pitch Controllers EmptyFri Oct 14, 2022 1:52 am by Cheapsub

Statistics

Our users have posted a total of 11829 messages in 1937 subjects

We have 971 registered users

The newest registered user is DAKpy

Similar topics

3 posters

    Pitch Controllers

    redboat219
    redboat219
    Guest


    Posts : 36
    Join date : 2013-08-20

    Pitch Controllers Empty Pitch Controllers

    Post  redboat219 Sun Oct 31, 2021 8:08 am

    How is it that commercially available automatic pitch controllers / angle keepers like the ones from Microgyros, Engel, Nautilus Drydocks, are the size of a postage stamp if not, slightly bigger while if you decide to build one yourself using an MPU6050 accelerometer chip and an Arduino you get something you'll have trouble cramming into say a 2" diameter WTC.

    All of the APCs on the market were designed before Arduinos. Why are they smaller?
    Would it be possible to use the MPU6050 only and couple it directly to the servo?

    avatar
    ccclarke


    Posts : 14
    Join date : 2021-02-20

    Pitch Controllers Empty Re: Pitch Controllers

    Post  ccclarke Tue Nov 02, 2021 10:08 pm

    Arduino PCBs are general purpose controllers with a lot of components that are unnecessary for a single-purpose pitch controller, hence the larger size.

    You might want to investigate something like this if you prefer to reinvent the wheel: https://www.adafruit.com/product/1500?gclid=EAIaIQobChMI4NPL2Nf68wIViIzICh0Ecg2MEAQYAyABEgIVRfD_BwE

    david f likes this post

    avatar
    SimonH


    Posts : 60
    Join date : 2020-09-29
    Location : Nottingham, UK

    Pitch Controllers Empty Re: Pitch Controllers

    Post  SimonH Wed Nov 03, 2021 9:31 pm

    if you really want to go small you can build your own gold wire bonding machine, a bit like a 3-d printer but uses fine gold wire and pressure (via a knife edge), the company I once worked at made one, but you do need a clean room and a supply of the bare chips (no resin package so just bare silicon die) then you simply wire bond multiple dies onto a very small PCB probably made from alumina ceramic.....
    OK if your making many, but probably 100's rather than 1000's actually once you have the kit :)
    seriously what you could try is rather than have a single PCB, use multiple smaller PCBs that are then stacked on top of each other, a bit like the arduino shield type of idea, but much smaller. You'd probably need to go BGA (ball grid array) package so another level of soldering as you have to use an oven (or hot air) rather than a soldering iron. You'd end up with more of a cube, but it would probably make better use of the available volume but heat transfer is a pig so put the high power devices on the outside....

    Actually, thinking out loud, if you put all your electronics on a flexible PCB (more common nowadays) you could simply roll it up and push into the WTC .... sorted.
    Quick animation:
    https://resources.pcb.cadence.com/blog/2020-designing-a-flex-pcb-prototype-pcb-design-tips-and-considerations

    As mentioned, with high enough volumes you can get the chip functionality you need and no more, in the smallest package and use the latest manufacturing techniques not available to us. You don;t need to have the latest stuff yourself now, you use a contract manufacturer who has and can spread the cost and knwos how to use it.

      Current date/time is Fri Feb 03, 2023 11:13 pm