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  • Portable environmental monitor

  • Populate the board. You will need some good experience with 0805 SMD soldering, and some tools like soldering iron and hot air rework station. Start with the bottom side, with the microcontroller, the other ICs and finally the small passive components....
  • Put the HV supply in an enclosure

  • Get a metal enclosure, drill holes for 2 connectors - 1 BNC and another one of your choice for 5V power.Drill another 2 holes on the other side - one for the Enable Switch and one for an optional multiturn 5K potentiometer (do not populate footprint...
  • Arduino-Compatible FPGA Shield

  • Step 3 - Build major footprints:  Costing the available board area requires building the major footprints and placing them on the PCB.  Built early footprints and placed to determine what additional space is avail.  Files in git.
  • TI-84+ SE Backlight

  • As you can see in the picture, the screen is glued onto the PCB with a thick piece of aluminium between them. Now we have to remove the LCD screen and plate from the motherboard. This is tricky. You must be extremely careful, because the LCD is made...
  • TI-84+ SE Backlight

  • Now is a good time to test your LCD and make sure it still works. Load the batteries back into the back half of the case. Press the motherboard against the back half of the case so the battery connectors make contact. Use a screwdriver or some other...
  • TI-84+ SE Backlight

  • Assemble your LCD sandwich with the EL panel on the back, then the polarizer, then the glass. You can use some scotch tape around the edge to hold everything in place. I used some putty to stick the whole thing to the PCB, but you could also use some...
  • TI-84+ SE Backlight

  • Carefully bend the EL panel leads so they fold around the back of the PCB. The panel can bend pretty far, just don't crease it.Now install the board back in the front half of the case and screw it down. The EL panel leads will stick up through gap between...
  • EFFECTIVE STUN GUN

  • CLEAN UP YOUR WORKSPACEGather your componentsWe will start with the "multivibrator" or "Oscillator" circuit. It supplies an A.C. Waveform to the "T1" transformer. you can make a PCB or just solder the legs togetherIt's not a very complex circuit.First...
  • CANPi

  • Get the PCB: http://oshpark.com/shared_projects/20v7dQka
  • RF light switch

  • If you do try this however and end up with a nice PCB and case for the transmitter and/or receiver, gimme a shout, I'd like to see pics! I'm dismanteling mine now for a house move. For the new house I will buy a kit from dx, but this was a fun learning...