Model Boat Mayhem - Forum

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: Bryan - G4CVF on June 14, 2015, 04:39:36 PM

Title: Action P50A ....
Post by: Bryan - G4CVF on June 14, 2015, 04:39:36 PM
Hi - I have one of these units which I removed from a model boat some time ago but I can not remember what its function is. Looking at it and the board connections I think it is a small speed controller but I would like to know if this is correct and what its specifications are. Can some one point me towards a spec sheet for it please?


Thanks - Bryan

Title: Re: Action P50A ....
Post by: plug on June 14, 2015, 04:48:13 PM
Google " component shop " and all the action stuff is on there

regards Jack.
Title: Re: Action P50A ....
Post by: Bryan - G4CVF on June 14, 2015, 05:11:00 PM
Hi Jack - double checked the "Component Shop" just in case I had missed it but they list all current products which unfortunately does not include the P50A. Could not find any historical data.


Regards - Bryan
Title: Re: Action P50A ....
Post by: plug on June 14, 2015, 05:27:24 PM
Hi Bryan, sorry I thought they had all the Action stuff, there is a member on here " inertia " if he spots this thread he'll probably will advise you or send him a pm

regards Jack.
Title: Re: Action P50A ....
Post by: inertia on June 14, 2015, 05:33:22 PM
Can you post a picture of it (preferably out of its case)? That might give me a clue. I have no details of it at all; it certainly wasn't in current production when we took over ACTion from Craig in 2007. Don't bother contacting CompShop - they have only the information I sent them, and P50A wasn't included.
DM
Title: Re: Action P50A ....
Post by: Bryan - G4CVF on June 14, 2015, 07:35:10 PM
Hi DM,


Having taken the device out if it's box I now think it is a Switcher of some sort. The Pic is a 12C508A, the power transistor is a TIP55 and the relay looks to be rated at few amps DC - switching current limited by the size of the pub tracks? Should be a couple of pictures attached.


Many thanks - Bryan
Title: Re: Action P50A ....
Post by: Bryan - G4CVF on June 14, 2015, 07:36:34 PM
Let's try that again - hopefully with a different picture this time!
Title: Re: Action P50A ....
Post by: Stan on June 14, 2015, 08:14:08 PM
HI Guys I have lot of old info sheets from Action will check see if I can help. This looks more like a speedo than a switcher unit.

Stan. :(( :(( :(( :(( :(( :((
Title: Re: Action P50A ....
Post by: malcolmfrary on June 14, 2015, 08:52:43 PM
Looking at the PCB layout, the relay would be a DPDT type, and reverses the power to the two unwired terminals.  It is probably operated by the small transistor and uses the receiver power to operate.  If plugged into a powered RX, working the appropriate stick should result in the relay clicking around center.
Title: Re: Action P50A ....
Post by: Stan on June 14, 2015, 08:54:06 PM
HI This is a speedo dating back to Craig Talbot's time. The circuit is a Commander 5 MicroComputer speed controller rated at 5 amps . I have the full info sheet I you would like a copy please Pm your contact details and I will scan and send on.

Stan Reffin
Kirklees Model Boat Club.

Before. :(( :(( :(( :(( :((Now :-)) :-)) :-)) :-)) :-)) :-))
Title: Re: Action P50A ....
Post by: Stan on June 14, 2015, 09:08:06 PM
HI Guys info sheets scanned and placed on MAYHEM.

Stan
Title: Re: Action P50A ....
Post by: Bryan - G4CVF on June 14, 2015, 09:52:15 PM
Many thanks Stan. I can remember sending an order to the Biggleswade address for this kit and I can remember building it. I can not, however, remember which model boat I put it in and subsequently took it out of. The really embarrassing thing is that I probably still have the boat - I tend to hang on to my models far too long!


Regards,


Bryan
Title: Re: Action P50A ....
Post by: inertia on June 14, 2015, 11:10:29 PM
Thanks, Stan. I should have known you'd have something on it.
Dave M
Title: Re: Action P50A ....
Post by: Tug-Kenny on June 15, 2015, 11:04:03 AM

Thanks from me also Stan.    :-))

I have this unit and worked out the design some time ago.  A chip controls the small transistor to control a large switcher transistor, and a relay reverses the process to go in reverse.
 
Mine has failed circuit components which I couldn't identify.  I'll have another go now and see if I can get it working.  Cheers   :}

ken
Title: Re: Action P50A ....
Post by: inertia on June 15, 2015, 12:56:05 PM
Ken
Now that Stan has turned up trumps with the instruction sheet I remember that "Commander" was Craig's first range of speed controllers using PIC chips, after the demise of the ZN409 I/C. These were high-frequency units and some customers didn't like the high-pitched squeal from the motor at low revs, so the programming was changed to make it low frequency. The new range was the "Condor"; I've no idea why he chose that name - he smoked cigarettes!

I still have some of those 8A DPDT relays and 4MHz crystals in stock but not the semiconductors. If the PIC is shot then it's a bin job, I'm afraid, as the source code belongs to the guy who wrote the software.

Dave M
Title: Re: Action P50A ....
Post by: Tug-Kenny on June 15, 2015, 08:05:58 PM

Thank you for the input Dave.

According to my  'Scope'  the adjustable wave pattern from the  Pic  Chip has reduced to minimal peak and therefore I have to agree with you and scrap it.

I now have some super  AcTion gear and will  be using it in my Seabex One.

ps.  The solder you sold me years ago is still going strong.  loads left.   :}

ken