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Month / February 2018

PCBite Kit 2.0 from Sensepeek Arrived

Last week the new PCBite Kit 2.0 from Sensepeek arrived. The new kit comes with the great PCBite holder from the previous version, which are very useful to fasten a PCB for soldering, rework or analysis. New to this kit are the handy probes, which also can be magnetically attached to the mirror board.

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The mirror finish of the board let you keep the bottom side of the board in sight while you are working on the top side. It is a very useful feature, like in the example shown in my photos where I analyse the communication of the snow flake board and can see the LEDs on the bottom side.

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The probes have a nice weight and come with a very precise gold needle tip. You can easily place them on even the finest pin or trace. The tip contains a spring like a pogo pin, therefore it keeps an equal amount of pressure on the board and does not move if there are vibrations or if you carefully move the board around.

With each probe, there is also a different needle with a crown tip. This alternative tip is more like a really tiny fork to be placed on small wires and pins. Continue Reading

Open Position for Step-Up Converter

For a current project I need a step-up converter to get 5 volts from 2.5V-5.5V input. The output of this converter is used to power sensors which drive motors and small heat elements from this source. The average consumed current is 160mA with a peek at 320mA.

In the photo you can see the latest Boldport project with a test setup for the XC9142B50DMR-G from Torex Semiconductor. I made the mistake and just relied on the specifications stated on the website from Mouser:

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This looks really good: 500mA output current… So I did a quick test. Obviously the magic smoke in the photo is a composition, but this is what actually happened somewhere at a constant ~250mA load with 5V input. Continue Reading

Adafruit PCB Coaster Arrived

Today I got the PCB coaster from Adafruit. They look so much better in real than on the photos in the shop. The coasters are made from 2.4mm FR4 PCB material. There is a transparent solder mask on the top to protect the copper and gold elements. The frame around the image is black silkscreen. I […]

Boards in Good Quality from SeeedStudio Fusion

SeedStudio offered me a coupon to evaluate their PCB service “Fusion“. I am currently working on a new project, so I gave this service a try. I used the following options ordering the two boards:

PCB Dimensions 68mm*108mm
Impedance Control No
Surface Finish HASL Lead Free
Minimum Solder Mask Dam 0.4mm↑
Copper Weight 1oz.
Plated Half-holes / Castellated Holes No
Minimum Drill Hole Size 0.3mm
PCB Color Blue
Base Material FR-4 TG130
No. of Layers 2 layers
PCB Quantity 5
Blind or Buried Vias No
PCB Thickness 1.6
Trace Width / Spacing 6/6 mil

I payed $27.40 for five boards with the option shown above and there were additional $20 shipping costs.

My board design has a very low quality class B4: Minimum drill size is 0.35mm, minimum trace size and spacing is 0.2mm.

Ordering and Shipping

The order process was very simple. The website provides an assistant with all possible options and calculates a quote in real time. I just noticed these minor things:

  • The shipping cost is not displayed in this quote.
  • The dimensions were not correctly extracted from my Gerber files.

The production of the boards and the shipping was quite fast, the whole process only took 10 days until the packet with the boards arrived.

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The boards were well protected in the package, so there were no scratches from the shipping of the boards.

Quality

The boards have a good quality for the chosen options and the price. The alignment of the layers is not perfect, but everything is in an acceptable range.

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The front side of the two boards. Continue Reading