501J DC Voltage Standard, 6225AXXSZS-DC3, DMM7510, Franklin Robotics, Google Lens, Internet of Useful Things, JuiceZero, Keithley, LSM9DS1, MacroFab, macrofab engineering podcast, MEP, OPA549, Podcast, PX3AN2BS250PAAAX, SPU0410HR5H-PB, Tertill, TMP102

Podcast

Parker Dillmann | May 19, 2017

MEP EP#68: Sonic Massage

Podcast Notes

Parker
- IoT Compressor Update with part list!
  - LSM9DS1
    - IMU for vibration sensing
    - iNEMO inertial module: 3D accelerometer, 3D gyroscope, 3D magnetometer
    - 3.3V, I2C
  - SPU0410HR5H-PB
    - MEMS Microphone
    - 3.3V
    - Analog signal, will be boosted with an opamp
  - TMP102
    - Board Mount Temperature Sensors Low Power Digital Temp Sensor
    - 3.3V, I2C
  - PX3AN2BS250PAAAX
    - Pressure Transducer
    - 1/8″ NPT Male fitting
    - 5.0V
    - Analog output 0.5V – 4.5V over pressure range
  - 6225AXXSZS-DC3
    - SSR to control the compressor switch
    - 3VDC to 32VDC control signal
    - Place 10ohm in series from pin from particle photon for protection.
    - TVS 3.3V for transient protection.
Stephen
- Voltage Standard Calibration complete!
  - Used the Keithley DMM7510 to dial in the voltage standard.
- Synth Update: Now with sound effects!
  - Stephen played a bunch of warbles
  - Only one section is working at the moment – VCO – voltage controlled oscillator
  - Next update – rest of VCL complete. MIDI control – animator up and running. LFO low-frequency oscillator done.
- Space Echo is now working (woohoo)
  - Mechanical adjustments are calibrated too!
  - Break the tape in to let it run, the sound gets better.
Pick Of the Week (POW)
- OPA549
  - High-Voltage, High-Current Op Amp, Excellent Output Swing
  - 8A Continuous 60V
  - $23.44
  - Could be used for the SSPS
Rapid Fire Opinion (RFO)
- JuiceZero by SparkFun
  - DIY version of the Juicero press made out of artisan cardboard and using Capri sun
- Google Lens will let smartphone cameras understand what they see and take action by TechCrunch
  - google.io conference Google AI or AI technology.
  - Evolution of Google Glass with better human interaction?
- Robot Lives in Your Garden and Eats the Weeds found on HackADay
  - Franklin Robotics was started by former iRobot employees.
  - Name of the robot is Tertill
  - Short plants bad, tall plants good.

Figure 1: Stephen getting the VCO working on his Synth design.

Figure 1: Block diagram for the Synth. Coffee stain included.

Special thanks to whixr over at Tymkrs for the intro and outro!

About The Hosts

Parker Dillmann is MacroFab's Co-Founder, and Lead ECE with backgrounds in Embedded System Design, and Digital Signal Processing. He got his start in 2005 by hacking Nintendo consoles into portable gaming units. He also runs the blog, longhornengineer.com, where he posts his personal projects, technical guides, and appnotes about board layout design and components. Parker graduated with a BS in Electrical and Computer Engineering from the University of Texas.

Stephen Kraig began his electronics career by building musical oriented circuits in 2003. Stephen is an avid guitar player and, in his down time, manufactures audio electronics including guitar amplifiers, pedals, and pro audio gear. Stephen graduated with a BS in Electrical Engineering from Texas A&M University.