HackMD
MEETING-NOTES
tags: WORK STATION FOR ARTIST
**meeting 11/11: ALL members + Yaohua Liu, new member
**
jonthan's sketch
We can privide the microphones and data acquisition
1/2" prepolarized free-field condenser microphone, 50 mV/Pa (+/-1.5 dB), 3.75 Hz - 20 kHz (+/-2 dB) with 1/2" ICP® preamplifier (426E01) and TEDS
QTY: 2
**
meeting 4/11: SL, Taro, Martin.**
fabrication of a rice container-
references:
The rice bug container design sketch-
notes:
40cm(L)x20cm(w)x25cm(H), built of partially pine wood (two sides)and traspanrent arcylic (top and sides and bottoms). Top slide open door. Wood compartment (6cm)on both sides to conceal some electronic equipments. A transparent separation (slidable)with a window in middle is built in to allow two compartments of the container.
Functionality (incl. part list proposal):
(1)temparature control:
https://www.aliexpress.com/item/4001149967820.html controls temp & hum.
https://www.aliexpress.com/item/32885296076.html
(2)humidity control:
https://www.aliexpress.com/item/1005001417319379.html https://www.aliexpress.com/item/4001358909868.html
(3)ultra violet (UV-A) lights:
https://www.aliexpress.com/item/32948092507.html 2x 370-375nm pcb version https://www.aliexpress.com/item/32911662203.html 2x (1-2x)3w version
(4)anti-vibration
(5) sound proof
For (4)(5), maybe by building leg structure to hold the box?
the two compartments on two sides (6cm) is reserved for misc electronic devices, i.e. rasberry pi, ultrasound microphone+++)
There can be two membraneless speakers attached to the boxes also: https://daytonaudio.com/product/1229/daex30hesf-4-high-efficiency-steered-flux-exciter-with-shielding-30-mm-exciter-40w-4-ohm
meeting 28/10: SL, Taro, Xav, Martin notes:
sliding panels, box in box, traditional materials and transparency - different material panels
rice bug eavesdropping - 2 way translation/communication human/bugs
humidity - 70% relative (ultrasonic fogger?)
control of: light (UV also), temperature, humidity, sound coming in, ultrasonic capture/mic inside and speaker - membraneless exciter attached on outside of container 4/5cm diameter 6W
3d model
oxygen? filter/cloth
Tech - Martin notes
Some papers:
https://academic.oup.com/ae/article-pdf/57/1/30/18754512/ae57-0030.pdf
www.ars.usda.gov/sp2UserFiles/person/3559/publications/ee89p1301.pdf
https://www.researchgate.net/publication/51694620_Eavesdropping_on_coconut_rhinoceros_beetles_red_palm_weevils_Asian_longhorned_beetles_and_other_invasive_travelers
As it should be prototype phase I would suggest trying a few different approaches for bug eavesdropping, including radio transmission based on movement of rice grains. But that option is low budget.
I would also like to try a few different ultrasonic mic options so I suggest the following (with budget indications). The PIs would also generate signals for the ultrasonic speakers (Taro - would we need amplifier for these/how do you usually drive them?).
-
2x PI 4 4GB with SD cards: 130 euros
-
1x Raspberry Pi Shield - RPI HB DAC+ ADCP - audio interface at 192KHz sample rate: 80 euros
-
Electronics for amplifiers, transmitters, several MEMS ultrasonic microphone electronics: 50 euros
-
Ultramic UM192K (https://www.dodotronic.com/product/ultramic-um192k/?v=2a47ad90f2ae ): 260 euros with shipping and VAT
TOTAL: 530 euros
meeting 29/09: SL, Taro, Xav, Martin notes:
decide on 2 rice bugs to grow-
Rhyzopertha Dominica (Lesser grain borer)
http://azai.tari.gov.tw/videoSheet.html?id=4
(this one in rice storage, can fly, need high temperature to grow)
Sitophilus oryzae (rice weevil)
http://azai.tari.gov.tw/videoSheet.html?id=3
(this one at home rice storage, only crawl)
Jonthan propose for container-
所以我們先用壓克力製作一
恆溫箱與攪拌棒
然後可以上下兩層
(to discuss)
Martin:
Design constraints: vibration proof (can be suspended in air, or with air gap: chamber in chamber), ability to install and de-install sensors and controllers (easy access), temperature and light control should be easily changed and monitored from say raspberry pi.
Ideas: Two identical chambers so that we can add and subtract signals from both containers. Also like Maxwell's daemon (sorting entropy!)
Audio platform: ultrasonic microphones sampled by raspberry pi.
meeting 18/11, meeting Taro, Xav, hank, Shu lea
taking Xav's 2nd solution, fish tank and metal frame, but making metal frame with plexi glass, enclosing the fish tank, leaving 10cm space for putting electonic stuff. fish tank can be 60cm length…(notes, shulea)
