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Questions & Answers/Tips & Tricks => Projects => Topic started by: chris.bailey on 12:27:58, 27 October, 2017

Title: Power,Focus,Dew Control in one box
Post by: chris.bailey 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/ (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
Title: Re: Power,Focus,Dew Control in a a box
Post by: Nimbus on 13:40:15, 27 October, 2017
Great skills Chris I look forward to seeing the finished article. ATB Jim
Title: Re: Power,Focus,Dew Control in a a box
Post by: Roger B on 15:27:56, 27 October, 2017
I want one. lol


Rog
Title: Re: Power,Focus,Dew Control in a a box
Post by: chris.bailey on 17:17:50, 27 October, 2017
I want one.

£200  :laugh:
Title: Re: Power,Focus,Dew Control in one box
Post by: Nomis Elfactem on 19:59:50, 27 October, 2017
I want one.

£200  :laugh:

£600 for you Rog !!
Title: Re: Power,Focus,Dew Control in one box
Post by: psjshep on 22:55:59, 29 October, 2017
 :harhar:
Title: Re: Power,Focus,Dew Control in one box
Post by: chris.bailey 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
Title: Re: Power,Focus,Dew Control in one box
Post by: chris.bailey 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
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