What's on your Workbench?

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Re: What's on your Workbench?

Postby VK5ZT » Sun Jun 26, 2016 12:53 pm

Hi all

Multitasking day in my office.....

- Lunch (cup of soup,lower left)
- stressing a RasbPi2 running qtsdr radio transceiver alongside fldigi
- browsing VKlogger
- watching youtube video on engineering disasters (occasionally relevent in my workshop)!
- looking at Arduino C code for the 3.5 GHz panels
- checking emails

Multitask_day.jpg
Multitasking day.....


Cheers

Tim VK5ZT
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Re: What's on your Workbench?

Postby VK5KK » Sun Jun 26, 2016 6:33 pm

Hey Tim

The graphic equalizer on the boom box seems to be set for a optimal mid range audio pass band, is this part of the Raspberry Pi SDR experiment?!!!

Cheers

David VK5KK
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Re: What's on your Workbench?

Postby VK3YE » Wed Jul 20, 2016 6:04 am

Using a cheap superregenerative UHF data receiver module and audio amplifier to receive 70cm AM signals on about 434 MHz.

https://www.youtube.com/watch?v=7SoXrV6nKBQ



Possible improvements include adding a cavity filter to narrow selectivity (and avoid the heavy activity on 433.92 MHz) and a transmit module to provide a beat signal for SSB reception (although unlikely to be sufficiently stable).
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Re: What's on your Workbench?

Postby VK2AVR » Tue Jul 26, 2016 8:58 am

Designing a PCB for a linear PSU with precision crowbar at the moment, got some expensive (and labour intensive) equipment that needs 5V/12V dual rails. I don't want the equipment to go up in smoke in case of PSU fault :thumbup:
Geoff
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Re: What's on your Workbench?

Postby VK4BXI » Wed Jul 27, 2016 7:31 am

Geoff,
I've used the Texas TL431 for my crowbars, used as switch they worked very well for me .
posting.php?mode=reply&f=45&t=11410#
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Re: What's on your Workbench?

Postby ZL3OZ » Wed Jul 27, 2016 1:44 pm

Hi tech here.

A spring out of a roller blind, a small plastic toy motor gearbox with one wheel lathed out so its like a pulley. Jaycar 6 cell battery holder and a couple spring loaded switches. A miniature bowden cable out of some old bit of Mil radio gear (arc5?) and some cardboard tubes, paint and hot glue and voila! an extending nose for Pinocchio in a local school production.
Other than that just boring work making another batch of AutoDrafters.
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Re: What's on your Workbench?

Postby ZL3RC » Thu Jul 28, 2016 9:11 am

We need a picture Ken as it sounds most interesting, coming from one thats spent a lot of time working in the theater :thumbup:
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Re: What's on your Workbench?

Postby ZL3OZ » Mon Aug 01, 2016 11:39 am

Ah Roger. I made it work, quick text so it can go for approval, now its in rehearsals, no pictures taken.

But as a picture paints a thousand words logically a thousand words will describe a picture.... so here goes.

Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words
Words words words words words words words words words words

Thats only a rough sketch, but you get the picture. and by the doubling law, copy and paste would have gotten quite serious in the next few clicks and I would have been barred from Logger. :D

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Re: What's on your Workbench?

Postby ZL3RC » Mon Aug 01, 2016 12:45 pm

Ive been listening to Goon Shows while at work today and somehow that sort of fits..... "I resign"


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Re: What's on your Workbench?

Postby VK3ALB » Wed Aug 10, 2016 6:07 pm

My field day version of the EMDRC True NORTH rotator controller. I'm building this because it gives my old Emotator rotator PC control capability and our current Armstrong rotator leaves a lot to be desired. The controller uses a CMPS11 compass module to determine direction, has inbuilt magnetic declination compensation, 99 bearing memories and is compatible with the Yaesu GS-232 protocol. Of course, it's designed tough for Aussie conditions!

on the bench.jpg
Nearing completion

TrueNORTH Rotator Controller V1.5.pdf
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Re: What's on your Workbench?

Postby VK1JA » Thu Aug 11, 2016 8:57 am

Very nice work, Lou. It looks professionally built!

Is there a kit version or circuit boards/front panel available for purchase (I searched the EMDRC website with no luck)?
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Re: What's on your Workbench?

Postby VK3ALB » Thu Aug 11, 2016 9:10 am

Hi Jayson,

There is a short form kit but it's not on the website. You can get 90% of the parts online but the rest you'll have to get from the club. Check the parts list at the back of the manual to see what you need to source and where you get it. I suggest you send an email to vk3er@emdrc.com.au or jump on their FB page and inquire there.
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Re: What's on your Workbench?

Postby VK5TX » Sun Aug 14, 2016 12:52 am

uploadfromtaptalk1471100171391.JPG


Working on a transverter controller.
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Re: What's on your Workbench?

Postby VK5ZLR » Sun Aug 14, 2016 8:00 am

I wish my projects looked that professional!
Deep in the heart of state of the art.
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Re: What's on your Workbench?

Postby VK5TX » Sun Aug 14, 2016 10:42 am

Its not hard. It just takes time and planning. Some cheap tools like a nibbler and a stepped drill make things alot easier.

Image
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Re: What's on your Workbench?

Postby VK3ALB » Sun Aug 14, 2016 11:51 am

Use your favorite drawing program to design a front panel
Print on normal paper stock or pure white photo paper
Laminate or cover with clear plastic
glue to your front panel
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Re: What's on your Workbench?

Postby VK3QI » Sun Aug 14, 2016 1:57 pm

I use a different method than that to create front panels.

(1) Use a computer drawing program (or even something simple like WORD) to create the required image - I recommend bold black as the best.

(2) I print onto Avery crystal clear laser shipping and parcel labels (1 per A4 sheet) - make sure you adjust the setting on your laser printer for labels

(3) Carefully peel the label from it backing sheet and apply to the metal panel

(4) Using a can of clear spray cote - apply a number of light sprays to the finished label with about 20 minutes between sprays - more light sprays is better than one or two sprays.

The Avery order code is 959065 software code L7567 25 sheets per packet Officeworks stock them for about $75 per packet


Cheers

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Re: What's on your Workbench?

Postby VK3QI » Sun Aug 14, 2016 2:04 pm

I should have added that if you shop around on Ebay, you can often get these clear labels for under $50 per packet.

Cheers

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Re: What's on your Workbench?

Postby VK5TX » Sun Aug 14, 2016 3:12 pm

Front panel express is good for making drill templates and it free

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Re: What's on your Workbench?

Postby VK3TU » Mon Aug 15, 2016 10:13 am

VK3QI wrote:...I print onto Avery crystal clear laser shipping and parcel labels (1 per A4 sheet)


Peter, have you tried it with a colour printer to see if you can do coloured meter scales like this?

Bert
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