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Author Topic: Power,Focus,Dew Control in one box  (Read 701 times)

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Offline chris.bailey

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Power,Focus,Dew Control in one box
« on: 12:27:58, 27 October, 2017 »
There are a number of pre-made integrated solutions to power distribution, dew control and focus control but a) they are eye wateringly expensive and b) don't provide what I am looking for.

Images below are work in progress of focus control board (based on myFocuser Pro https://sourceforge.net/projects/arduinoascomfocuserpro2diy/ with aisler PCB) and a PWM dew controller based on a Velleman K8004 kit.

Both boards work in isolation (including Ascom driver and temperature sensor) and am now just waiting for some Powerpole panel mounts and a project box to arrive from China to finish it off.

Total cost so far (excluding stepper motor) about £30. Only really tricky bit is crimping the tiny JST header pins. Spare headers on the focus control board are for a display and push buttons (which I am not going to incorporate)

Chris
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Offline Nimbus

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Re: Power,Focus,Dew Control in a a box
« Reply #1 on: 13:40:15, 27 October, 2017 »
Great skills Chris I look forward to seeing the finished article. ATB Jim
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Offline Roger B

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Re: Power,Focus,Dew Control in a a box
« Reply #2 on: 15:27:56, 27 October, 2017 »
I want one. lol


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Offline chris.bailey

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Re: Power,Focus,Dew Control in a a box
« Reply #3 on: 17:17:50, 27 October, 2017 »
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
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Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
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Lunt LS60PTBF1200|DMK41|Quark Chromo
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Offline Nomis Elfactem

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Offline psjshep

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Re: Power,Focus,Dew Control in one box
« Reply #5 on: 22:55:59, 29 October, 2017 »
 :harhar:
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Offline chris.bailey

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Re: Power,Focus,Dew Control in one box
« Reply #6 on: 12:55:38, 02 November, 2017 »
All completed and undergoing some soak testing. A bit of a tight fit in the project box but it gives

* Focus control of a stepper motor with Ascom
* Two channels or PWM dew control
* 3 x 2Amp fused outlets with Powerpole connectors
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline chris.bailey

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Re: Power,Focus,Dew Control in one box
« Reply #7 on: 09:20:25, 03 November, 2017 »
A small gotcha for anyone using the Velleman 8004 PWM for dew control. The PWM switching is done on the negative line so with a metal project box with other negative line items connected to it, you need to isolate the RCA connectors or the outlets run at full power all the time.

Took me a while to figure that one out!

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

 

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