We been experimenting with fast inexpensive ways to create custom printed circuit boards at home. Here’s the process that seems to work the best.<\/p>\n

Step 1: laser print your layout on transparency film.<\/p>\n

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Step 2: Buy pre-treated photosensitive pc board:<\/p>\n

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Step 3: Cut a piece of the pc board to size.<\/p>\n

Step 4: Using a “safelight” that won’t expose the board (a 40W incandescent bulb), peel off the protective white layer:<\/span><\/p>\n

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Step 5: Lay the pattern on the board (treated side up) and cover with an acrylic plate to hold it in place:<\/p>\n

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Step 6: Expose under a UV photo lamp for 5-8 minutes.<\/p>\n

Step 7: UV light makes the exposed parts of the board susceptible to removal using NaOH solution. Place in a NaOH bath until the pattern becomes clearly visible. In my experiment last night this took about 30 seconds. Immediately rinse in a water bath to remove excess NaOH. The bottle says 1 part concentrated solution to 7 parts water. I got better results with a ratio of 1:10:<\/p>\n

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Step 8: Etch away the copper using equal parts 14% HCL and 3% H2O2. Takes 10-20 mins:<\/p>\n

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Step 9: Rinse in water and dry.<\/p>\n","protected":false},"excerpt":{"rendered":"

We been experimenting with fast inexpensive ways to create custom printed circuit boards at home. Here’s the process that seems to work the best. Step 1: laser print your layout on transparency film. Step 2: Buy pre-treated photosensitive pc board: Step 3: Cut a piece of the pc board to size. Step 4: Using a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[6,5],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/posts\/199"}],"collection":[{"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/comments?post=199"}],"version-history":[{"count":5,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/posts\/199\/revisions"}],"predecessor-version":[{"id":212,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/posts\/199\/revisions\/212"}],"wp:attachment":[{"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/media?parent=199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/categories?post=199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.428industries.com\/wp-json\/wp\/v2\/tags?post=199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}