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couple of years ago i was looking to build a new soldering station that heats up quickly
after a lot of search on the internet i found a design that had all the features i wanted and it was relatively easy to build.
this design is not mine but the designer was kind enough and answered all my...
some time ago i needed a portable power supply that could lit led arrays so i can test various tv sets brought to my repair shop,so i decided to built one.this little device works perfect for 2-3 years now and all the repairs im making is done with the help of it.
here is the schematic and...
thank you all for your nice words..i must say that i tryied different types of illumination and a ''ring'' type pcb with leds around the camera but the result was not satisfying for me,to be able to read the letters on the smd components you must find the right angle to lit the object, so i used...
some time ago i made an electronic microscope for pcb inspection. since there is no video of the construction that time, i made one presenting it and showing how it works.it uses a cheap webcam and old digital camera lens mechanism for zoom-focus.
here is the video of the microscope and some...
you might be right, but the average waiting time that worked good for my pcb exposure was about 1-2 minutes,so i dont mind waiting this time.at least i dont need to be faster than this..also the time depends on how many transparent sheets you place on the pcb(to achieve darker black),again this...
ultraviolet exposure device i built few months ago. it is controled by an arduino pro mini and has a 7 segment display to show the set and remaining exposure time. it uses ultraviolet leds(49 total)bought cheap from ebay.
you can wire the arduino and the rest components using the diagram...
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