Electronics > Projects, Designs, and Technical Stuff
Borderlands style jewelry box research thread
Ian.M:
Yes, that link has a good symbol. You'll also see ones with a base lead, most often in opto-couplers.
If you have problems identifying the pin numbers of your opto-sensor, find the anode and cathode of the LED using a DMM with a diode test range that goes up to 2V, then match that up to the diagrams in the datasheet.
Youkai:
I was able to get it working. Soldered the sensor according to my diagram and using a serial monitor was able to detect when the sensor was blocked or not in Arduino studio. Yay! one more hurdle down.
Youkai:
I have tested the sensor and the button I'm going to use to open/close the thing. So now I'd like to start working on a more complete circuit diagram. But I'd like to do it in a program so I can quickly make adjustments to it without having to re-draw the whole circuit. I'm looking for a good simple editor that I can use to draw a circuit. I don't really need any fancy simulation or anything. I have LTspice and DipTrace on my computer and I'm having trouble getting them to do what I want. I'm sure that it's due to a profound lack of experience with these programs.
Does anybody have suggestions for a simple circuit diagram tool or a good tutorial that can show me how to use the ones I have?
EDIT: I'm starting to have some luck with DipTrace. I'll keep working with that for now and see if I can come up with something reasonable.
Youkai:
Ok so here is my first shot of a schematic. I made it using DipTrace. This is a schematic of a setup that I have wired successfully (though with only one RGB LED in my test). Pressing the button triggers the lights to turn on. Pressing it again turns them off.
Any input on the schematic would be appreciated. The next step is to expand the schematic to include the phototransistor and servos.
Nominal Animal:
I just received a couple of small geared stepper motors, similar to these. The axial cross section is 10mm × 12mm, body length about 20mm, so it fits inside a 20mm tall cylinder with 16mm diameter or greater (not including wall thickness). The ones I have have a 1:275 gearbox and 18 degrees per step, i.e. 5500 steps per turn. I haven't tested mine yet, but I do believe they have enough torque to rotate the tray or open the lid directly, without any additional gearing. Forcing the trays (by hand) is likely to strip the metal gears. There is a little bit of backlash.
The ubiquitous 28BYJ-48 geared stepper motors have more torque, and since their diameter is 28mm, you could place those too inside your cylinders. However, their axis is 8mm off center, so you cannot fit them inside a 40mm diameter cylinder with the axis at the center.
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