Vicci Ho is a writer, film programmer and producer. She has written for Variety and worked for film festivals across the globe, including Toronto International Film Festival, Zurich Film Festival and directed the Hong Kong Lesbian & Gay Film Festival.  She is the President of Janitor Interactive: a production company specializing in games.

This is her personal page.

Documentation - week 3

This week was speakers and theremin! Unfortunately, a lot of the sound isn't great on the video, but you get the idea. This is the tone output lab. I managed to set up the circuit okay, and managed to get the photo-sensors to play a tune. I was confused about why one photo-sensor was printing lower numbers when I pressed down on it, and one increased the value, but now I mostly understand why...

I shot a video of the sound coming out of the circuit...

photosensors as theramin from Vicci Ho on Vimeo.

I managed to play the tune set by the program (and one day I'll play a TV theme song off it...and I tried to play notes with this setup, but I am not sure what I did wrong or if the photo sensors is not the best variable resistor to use, but it mostly sounded like noise.

the three notes setup

Next up, servo motor.

I used a photo-sensor as the variable resistor, but I was hoping to use a FSR. Will try and do the next lab with another kind of flex sensor.

I did manage to get it to turn, though question I have is why we map the values (which I assume is the angle of the servo motor turn) to 179, rather than a higher value? I saw some great projects that are done with servo motors (i love the drum one) and would love to investigate further. I could be wrong but it seems that servo motor is not really about power (like a DC motor is) but more about control?

Here's the video of the servo motor success:

servo motor from Vicci Ho on Vimeo.

David and I worked on the final lab together with the transistor, DC power and the DC motor. I can't say I fully understand the function of a transistor, but I feel like I get it a little more than I did than when we used it a couple of weeks ago.

We built this circuit:

final circuit with DC adaptor and motor.

and got it to work. This is a video of us printing the values the potentiometer is controlling, and instead of a gradual change in power, it functioned as an on/off switch. The motor turns on about the halfway mark of the range we had calculated (which was around 340).

potentiometer / transistor from Vicci Ho on Vimeo.

That's all for this week!


Design meets disability