Print PDF
Favorite
Email
Step 12Assembling the Electronics
To do this you will need fairly advanced soldering skills and a decent soldering iron. The best way to describe the locations of the parts is via a picture, so check the photo below for guidance. I've included a high-res photo so that you can see every detail.
Start with the surface mount capacitors and resistors - they are the easiest to solder and are good practice if you haven't done surface mount soldering in a while (or at all). Do the DPAK voltage limiter next, followed by the slightly smaller SO-89 package MOSFETs. Then do the SOT23-5 flip-flops and inverters, and finally the capacitive sensors.
***A special note regarding the capacitive sensor IC. While these parts are compatible with the pin spacing of the SOT23 device, they have a ground tab on the underside that must be isolated or it may short out to the pins. If you have any, cut a small rectangle of Kapton tape and stick it to the underside to cover the ground tab. Otherwise, just use some masking tape.
Finish up by doing the point-to-point wiring, as necessary. This is where the schematic really helps - follow it carefully and you should be okay.
Position the board on the back of the poster and decide how you are going to run the wires from the LEDs and electrodes. When you're satisfied, cut wires that will reach from the board to the electrodes and solder one end onto the board. Then cut and solder the wires going to the LEDs.
Lastly, cut a pair of wires and connect them between the board and the power jack. Insulate the power jack with heat-shrink or electrician's tape.
Start with the surface mount capacitors and resistors - they are the easiest to solder and are good practice if you haven't done surface mount soldering in a while (or at all). Do the DPAK voltage limiter next, followed by the slightly smaller SO-89 package MOSFETs. Then do the SOT23-5 flip-flops and inverters, and finally the capacitive sensors.
***A special note regarding the capacitive sensor IC. While these parts are compatible with the pin spacing of the SOT23 device, they have a ground tab on the underside that must be isolated or it may short out to the pins. If you have any, cut a small rectangle of Kapton tape and stick it to the underside to cover the ground tab. Otherwise, just use some masking tape.
Finish up by doing the point-to-point wiring, as necessary. This is where the schematic really helps - follow it carefully and you should be okay.
Position the board on the back of the poster and decide how you are going to run the wires from the LEDs and electrodes. When you're satisfied, cut wires that will reach from the board to the electrodes and solder one end onto the board. Then cut and solder the wires going to the LEDs.
Lastly, cut a pair of wires and connect them between the board and the power jack. Insulate the power jack with heat-shrink or electrician's tape.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
