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Seattle Robotics Society

Page last updated: 12/22/2019

Commentary by S.D. Kaehler

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Meeting Pictures on Google Photos. If you have other pics you'd like to share please send them to SeattleRoboticsSociety(at)

9/21/19: This month's meeting had a turnout of about 30 people. The meeting was facilitated by Steve Kaehler. We met downstairs at the FIRST Fieldhouse warehouse.

The meeting was kicked off with a video about a GoBetween Robotics: A traffic stop robot to keep everyone safe.

SRS Polo shirts are available at meetings for $30 (card, cash, or check). The 2019 Robothon T-shirt are will be available for $25 (card, cash, or check) at Robothon.

Club Business

  • Consider alternatives to Presentation for 2nd half of meetings. We're looking for other ideas. Possibilities include Robothon contests or swapping the presentation and Round-the-Room pieces of the meeting.
  • Need Other Backup Meeting Leaders (I can't always run the meetings. More alternates are needed.
  • Jim Kindsvater and Steve Kaehler have been co-teaching a basic 6-week robotics class at Seattle Christian School this fall. They are 2 weeks in with 8 weeks to go.
  • Consider alternate After-meeting Activities. The workshops have been lightly attended. Robothon contests? Local facility tours? Something else?

If you have ideas or comments, please email me at SeattleRoboticsSociety(at)


Meeting Pictures on Google Photos. If you have other pics you'd like to share please send them to SeattleRoboticsSociety(at) The following people shared something with the group:

  • Will S. has built a computerized tidal clock that processes data downloaded from NOAA to drive a stepper motor with a hand that shows the current tide level and subsequent high and low tides for his location. Showed us his tide clock (including a regular clock) which is a present for his wife who likes to hike on the beach. It consists of a dual face display with a regular analog clock on top and a servo driven tide clock (indicator). The tide clock is run by a PIC processor with a servo control, LCD control, and Real Time Clock interface. Power is provided by a wall wart. He also showed us his Bus Pirate from Sparkfun, which can monitor and display bus context and activity. Costing $35.45, this board can sniff out and display SPI and I2C signals.
  • Ron P. demoed his I2C network based on a Raspberry Pi Zero W and several peripherals. Sensors and devices included an environmental sensor, a keyboard, and a proximity sensor. Sparkfun provides a Python library for this device. Devices include a Hat for Raspberry Pi, pushbuttons, a Keypad, a Thermocouple Amplifier, a Proximity sensor, a joystick, and many others. Also demoed a Sparkfun Redboard Artemis Arduino compatible that can run TensorFlow models. It features 1MB flash and 384K RAM and runs at 48 MHZ. Sparkfun has written a core to allow the Artemis to be programmed in the Arduino environment.
  • Joseph showed us his 4WD robot that he's building. It is in its early stages. He has some trouble with the skid steering system he's trying to use.
  • Steve K. showed his BS2 Boe-Bot that he's using for the robotics class at Seattle Christian School. He added a back bumper, IR Cliff sensors, and a front-mounted PING sensor. Steve also mentioned that the standard HC-SR04 ping sensor can be used as a 3-pin sensor by hooking a 1.7K resistor from the Trigger line to the Echo line. The trigger line is connected to an I/O pin and triggered then read as an input to receive the returning echo signal. This cuts down on I/O’s needed in your microprocessor and allows the cheap PING sensors to be used as it they were the more expensive 3-pin PINGs. Here is an article about this trick that uses a 10K resistor.

Feature Presentation

    Our program presenter was FIRST Robotics Team 5588, Team Reign from Holy Names Academy. This is an all-girls FIRST team (the only one in Washington!) from the Capitol Hill area. Their robot is designed to pick up and store target disks during the competition.

    In addition to competing in the FIRST challenge they see their mission as:

  • Help to start new FLL and FTC teams at local schools
  • Show their robot at local functions like the SRS
  • Work in the FIRST environment to promote mental health
  • Here are their presentation slides.

The Workshop

    The afternoon workshop was lightly attended but worthwhile. We will have these in the future as long as people want to attend.

If you have comments or opinions on this writing, please email me at SeattleRoboticsSociety(at)

To October 19, 2019 Weblog

To August 17, 2019 Weblog

Back to the SRS Weblog index page.