alcohol sensor (it's working!)

Built a voltage-regulation circuit that was shown here (seems like this layout is uncommon, as other resources seem to agree on using a circuit with a 10uF and a 1uF capacitor. I already ordered a 1000uF shown here, so I'll go with this). Seems to work like a charm. I connected it to the alcohol sensor circuit using a 9V battery as input, but it still did not seem to work:

Output voltage was constant @ ~5V. Expected behavior is 5V = maximum alcohol level.

After some thought, I just decided to try wiring the alcohol sensor circuit again. I was almost sure I had the wiring right before, but once I connected it after the re-wiring, output voltage started dropping:

Voltage dropping. As stated in the previous post, the sensor requires a 24-48 hour calibration time (to reach 0V state)

Two key functionalities are now usable. Time to start putting them together.

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playing with servos

some servos that I had ordered were delivered. the instructions suggested another brand/model of servos, but these were a much more economical (cheap). I tried adding them to the hand: I'll have to print the "pulley" pieces that will be attached to the servos. meanwhile, I did somewhat (hackily) got the wrist to work, for now: you keep hearing the "usb plugged out" sound in the background, and that's because the servo was being powered by the arduino. the servo's power draw appears to be causing a shutdown of the device. will need a better power source for the servos. it feels like these pieces that are supposed to be plugged into the servo will have size issues.

dabbling with android

I've been wanting to dabble with Android development recently, and yesterday I realized that there is a Socket.IO client API available for Java/Android. The API is pretty straightforward, so I loaded a test Android project I had made for going through Android basics and connected to the OpenSesame Node server. and it works! I mean, the interface is non-existent and it's really just bare-bones, but having the servo respond through an Android application was pretty refreshing. (the web client and the android client "communicating" with each other--messaging is pretty much for debugging purposes)

chunk update: most parts printed and assembled

currently: stuff that happened are: wired the fingers added screws to necessary assemblies witnessed first failed print during this: servos haven't come yet, but once they do, we can start installing them into the hand/forearm. as always, credit to the Inmoov project.

the quest for robots

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