PCB assembly


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Post Sat May 13, 2017 5:15 pm

PCB assembly

After preparing a suitable working space take the PCB and the 12R resistor (one of the pack of 2 black SMD components, marked 120). Fit this in the location shown:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:40 pm

Re: PCB assembly

Next the RFI filters (two of the pack of 2 grey SMD components). Fit these in the locations shown:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:42 pm

Re: PCB assembly

Now for the 1k2 resistors (two of the pack of 3 black SMD components, marked 122). Fit these in the locations shown:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:46 pm

Re: PCB assembly

The 0.22u capacitors (two of the pack of 3 brown SMD components). Fit these in the locations shown:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:49 pm

Re: PCB assembly

Now for the LEDs - starting with the clear/green. Fit this in the location shown - it's polarised and the SHORT LEG faces to the RIGHT:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:50 pm

Re: PCB assembly

Then the red. Fit this in the location shown - it's polarised and the SHORT LEG faces to the RIGHT:

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Image

Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:51 pm

Re: PCB assembly

Solder the USB socket next - it's on the same side of the PCB as the LEDs. Make sure you solder the frame leads as well:

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Last edited by Tony on Sat Dec 09, 2017 10:56 pm, edited 1 time in total.

Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:53 pm

Re: PCB assembly

Now the PIC IC - again it's polarised and there's a small dot to indicate pin1. This is the TOP LEFT pin:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:56 pm

Re: PCB assembly

Solder the 5-pin pinstrip onto the GPS module:

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Then solder it onto the main PCB - make sure it's on the correct side of the board:

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Site Admin

Posts: 950

Joined: Tue Jul 24, 2012 8:05 pm

Post Sat May 13, 2017 5:58 pm

Re: PCB assembly

Solder the 433 Tx module onto the PCB next to the GPS module - you'll need to bend the pins slightly to make it fit:

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Note that some of the modules may have an extra strip of PCB material attached - you can see it in the photo along the top of the module. This can be snapped off along the score line and will need to be removed for it to fit in the case.

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Solder a piece of wire from the pad on the top right corner of the Tx module to the PCB - there's a hole almost directly below it:

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