Tag Archives: PCB

Making PCBs with CNC

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Rui written an article on how to build your own PCBs using a CNC machine. Rui Cabral writes:

The PCB manufacturing method i used before buying my CNC machine was the lithography method and worked as follows:

First i printed the board design on an acetate sheet.

This sheet was placed over a pcb with a light sensitive coat and placed under UV light for several minutes.

The pcb was then immersed in a solution of caustic soda to remove the photo sensitive material that was “damaged” with the UV light.

The pcb was then immersed in a Ferric Chloride solution to remove the copper.

After the copper being removed i then washed the pcb to remove the chemicals and then i needed to cut the plate and finally drill the pads.

Making PCBs with CNC – [Link]

More awesome DoorBell control

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Felix of LowPowerLab posted an update on his DoorBell Mote project:

My first DoorBell Mote prototype was working nicely and it allowed monitoring the door bell (while also triggering it remotely – toddlers love it). But I wanted more. On weekends the family likes to get a well deserved nap during the day and often those pesky solicitors ring the bell and wake everyone up. So naturally the doorbell has to be disabled also, without major effort or any disconnected wires. Sounds like the perfect addition to the Door Bell Mote. So I made a new revision and a proper PCB for this, below is the schematic with the changes and the proto PCB from OSHPark. Actually I made more changes to the schematic after putting together the PCB, so there are some differences. I’ve tried a LTV814H optocoupler for AC detection instead of the more expensive H11AA11, it works just as well, but both can be used on this PCB

More awesome DoorBell control – [Link]

How to Build PCB Online using Web Based EDA Tools

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by circuitstoday.com:

This is a brief review of the capabilities and ease of use of three of the most interesting, innovative and downright disruptive web-based EDA tools:

EasyEDA
Upverter
Autodesk 123D Circuits (formerly Circuits.io)

The same simple astable multivibrator circuit is entered into each tool and the design process followed through simulation (where offered), to PCB layout and Gerber download.

How to Build PCB Online using Web Based EDA Tools – [Link]

EAGLE BOM generation script

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bom-gen_001Dilshan Jayakody writes [via]:

This is a quick post about EAGLE parts list generation script which I was written to replace existing “part2html.ulp”. This script generates more organized and detailed BOM HTML file and it can directly replace “part2html.ulp”.

This script is tested with EAGLE 6.6.0, but it can also work with older versions of EAGLE software.
This script is available to download at github with usage details.

EAGLE BOM generation script – [Link]

DIY Double Sided 60W LED UV Radiation Unit With Vacuum Pump

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Kurt Skauen writes:

This is a description of how I designed and built my UV exposure box. After experimenting a bit with dry-laminate photo-resist and liquid UV hardened solder mask I decided to stop trying to improve my toner transfer technique and rather build a proper UV radiation unit for making printed circuit boards.

I wanted it to be powerful and compact so I decided to use UV LEDs as the UV source. The preferred wavelength for the LEDs would probably be 365nm, but those LEDs turned out to be hard to find, and very expensive. The 395nm-405nm LEDs on the other hand are very inexpensive. And best of all, can be bough as high-density LED-strip’s on 5-meter rolls. So I bought two “5M Ultraviolet 395nm 3528 SMD LED” rolls that have 120 LEDs per meter for a total of 600 LEDs per roll. From what I could tell from a bit of googling the wavelength should work even though it is not ideal. Initial tests proved that the 395nm LEDs worked very well.

DIY Double Sided 60W LED UV Radiation Unit With Vacuum Pump – [Link]

Make a proper PCB exposer out of a cheap UV nail curing lamp

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by alibenpuff @ instructables.com:

What do PCB production and fake fingernails have in common? They both use UV light sources of high intensity and, as luck would have it, those light sources have exactly the same wavelength. Only the ones for PCB production are usually quite costly and the ones for fake fingernails are a bit more competitively priced.

This instructable is about how to use such a device to build a low cost light source, suitable for exposing the various UV sensitive materials encountered in printed circuit board production, like dry film photoresist and UV curable soldermask.

Make a proper PCB exposer out of a cheap UV nail curing lamp – [Link]

Altium CircuitMaker now Open Beta

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by elektormagazine.com:

Altium have decided to release their PCB design tool CircuitMaker as open beta. It will be available worldwide to all interested electronics designers, electronic makers and the hobbyist community as a free software offering. Anyone interested in participating in the open beta can register now at the CircuitMaker website.

The open beta testing program allows anyone to download and begin using CircuitMaker today and become part of a growing electronics design community where designs can be shared and collaborated on. The company anticipates that this open beta process will also provide feedback and input to help refine CircuitMaker and make it a useful design tool for designers in the maker community.

Altium CircuitMaker now Open Beta  – [Link]