DIY Setpoint Controller

Andy T · 19th May 2007, 17:16

I have been playing around with PIC controllers for a while and I have come up with my own setpoint controller. It has a simple GUI controlled by two buttons. Oxygen injection is controlled by voting logic and there are two user defined setpoints, with the abily to toggle between them during the dive. The user can choose to calibrate on oxygen or air. There is a two LED HUD and the backlight color for the P02 readings on the display matches the output of the HUD.

All in all I am pleased with the way it turned out, the next step is to build the housings. The ultimate plan is to build an eCCR with a couple of these controllers in the head. But in the shorter term we are going to modify a KISS so that we can check out how the electronics perform in the water.

BTW this is the first time I have tried to insert images - so I am not sure if they will appear.

Sutty · 19th May 2007, 18:35

Nice!

What display are you using?

Are you going for waterproof housing or just potting the whole circuit?

Neil

Andy T · 19th May 2007, 20:01

The display is a Sony TFT 240 x 160 with a serial back.

The intention at moment is to put the setpoint controller and batteries into a modified light canister.

The display will go into a one atmosphere housing. We have a prototype for the display housing milled from aluminium. Its probably a bit over engineered - but the guy who made it for us services bulldozers for a living and he doesn't do dainty.

**UWSojourner** · 19th May 2007, 20:13

Very nice! Let us know how the tests go. Great pics.

undrh2o · 20th May 2007, 00:02

Awesome - where do I buy one??

Andy T · 20th May 2007, 15:17

Quote: (Originally Posted by undrh2o)

Awesome - where do I buy one??

At this point it is very much a prototype and not for sale.

The plan is to convert a couple of KISS units to eCCR and test the electronics. If that works well I might be supply a few to homebuilders at some point in the future.

**Dave Sutton** · 20th May 2007, 17:43

Beautiful work! Nicer display than some of the so-called "factory" rigs. Well done! Really looks great.

I have a special project on my bench now, a rebreather for (get this), my Dachshund (who really dives, err... actually "walks on the bottom". Little legs make it hard to swim...) It's a fan-driven freeflow rebreather. I need a simple setpoint controller (to keep "Knirps" alive) and a HUD (so I can be his "Buddy" and monitor the loop). If you want to be able to brag that "Diver Dave's Dog Dives my Controller", you can be famous.... The little fellow has a hard time with open circuit gear (needs to be freeflow in the helmet, so wastes gas)....

Again, looks like a super system. Congratulations!

Dave

canetoad · 21st May 2007, 06:02

I think Knirps is in need of a DPV. Do you have any pictures of Knirps on OC? Love to see that. But would really like to see how his CC gear turns out.

canetoad · 21st May 2007, 06:17

Very nice. Your device looks like it has a lot of potential. Are those AA batteries in the picture? Was wondering if you have had the chance to guage battery life as yet? Please let us know how things develop.

louisrankin · 21st May 2007, 10:24

Very smart I love the colour display!

I look forward to seeing some more pictures when you fit it to the Kiss I have a Hammerhead on mine.

Louis

19th May 2007, 18:35	#2 (permalink)
Sutty Classic Kiss diver Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jun 2005 Location: Glossop, Derbyshire, UK Posts: 837	Re: DIY Setpoint Controller Nice! What display are you using? Are you going for waterproof housing or just potting the whole circuit? Neil __________________ Never forget that life is a finite resource.
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19th May 2007, 20:13	#4 (permalink)
UWSojourner Pacific Northwest Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Location: Portland Oregon Posts: 558	Re: DIY Setpoint Controller Very nice! Let us know how the tests go. Great pics.
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20th May 2007, 00:02	#5 (permalink)
undrh2o Chris Miller Current Rebreather/s: Other CCR Dolphin Home Build Other Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Join Date: Apr 2006 Location: Ottawa, Canada Posts: 206	Re: DIY Setpoint Controller Awesome - where do I buy one??
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20th May 2007, 15:17	#6 (permalink)
Andy T RBW Member Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Join Date: Jun 2005 Location: UAE Posts: 43	Re: DIY Setpoint Controller Quote: (Originally Posted by undrh2o) Awesome - where do I buy one?? At this point it is very much a prototype and not for sale. The plan is to convert a couple of KISS units to eCCR and test the electronics. If that works well I might be supply a few to homebuilders at some point in the future.
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20th May 2007, 17:43	#7 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: DIY Setpoint Controller Beautiful work! Nicer display than some of the so-called "factory" rigs. Well done! Really looks great. I have a special project on my bench now, a rebreather for (get this), my Dachshund (who really dives, err... actually "walks on the bottom". Little legs make it hard to swim...) It's a fan-driven freeflow rebreather. I need a simple setpoint controller (to keep "Knirps" alive) and a HUD (so I can be his "Buddy" and monitor the loop). If you want to be able to brag that "Diver Dave's Dog Dives my Controller", you can be famous.... The little fellow has a hard time with open circuit gear (needs to be freeflow in the helmet, so wastes gas).... Again, looks like a super system. Congratulations! Dave __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com
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21st May 2007, 06:02	#8 (permalink)
canetoad New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2007 Location: Florida Posts: 30	Re: DIY Setpoint Controller I think Knirps is in need of a DPV. Do you have any pictures of Knirps on OC? Love to see that. But would really like to see how his CC gear turns out.
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21st May 2007, 06:17	#9 (permalink)
canetoad New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2007 Location: Florida Posts: 30	Re: DIY Setpoint Controller Very nice. Your device looks like it has a lot of potential. Are those AA batteries in the picture? Was wondering if you have had the chance to guage battery life as yet? Please let us know how things develop.
(Offline)

21st May 2007, 10:24	#10 (permalink)
louisrankin Póg mo thóin Current Rebreather/s: Megalodon Other Rebreather/s: Sport Kiss Classic Kiss Join Date: May 2005 Location: Cambridge Posts: 315	Re: DIY Setpoint Controller Very smart I love the colour display! I look forward to seeing some more pictures when you fit it to the Kiss I have a Hammerhead on mine. Louis
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