Sat., June 11, 2022 – Marine GPS on a Pi

Dave will share his work in running Marine Navigation on a Pi including:

  • hardware requirements
  • how the zero could be used, but there are drawbacks
  • I was unable to get a pi 4
  • at George’s suggestion, I decided to go with the pi 400
  • hardware modifications to integrate the GPS unit within the pi 400 case
  • introduction to and a brief overview of the OpenCPN Chart Plotter Navigation software
  • some ideas I have to make a more “system-critical” GPS solution (will implement if I have time)

9:30-10a Cocktails & Conversation (virtual)
10a Presentation


QCollege has welcomed us back to meet in-person. We thank them for their support.

Virtual…

https://meet.vinnythegeek.ca/vicpimakers

Sat. Apr. 9, 2022 – Power Control

Show and Tell of how you are controlling the world (or at least your part of it) with an AC Power Control project. All are invited to share in this meeting.

QCollege, Suite 303 771 Vernon Ave · Victoria, BC, has welcomed us back to meet in-person. We thank them for their support.

We will be holding a Hybrid meeting (in-person & Jitsi). https://meet.vinneythegeek.ca/vicpimakers

Deid’s link: http://deid.ca/pi/power

George’s presentation .pdf

Sat. Nov. 13, 2021 – Infrared Data Communications

Jim Briante presenting

9:30-10a Cocktails & Conversation (virtual)
10a Presentation

Jim’s Presentation Notes are here.

IrDA Infrared communication
Infrared Emitting Diode
• Angle of half intensity: ϕ,
• Relative radian power vs wave length
Infrared Receiver
• Series for remote control
• Automatic gain control (AGC)
• Data format compatibility
Data Encoding Methods
• Pulse distance encoding, Pulse width encoding, Manchester bi-phase encoding
Basic IR System –IR emitter/receiver
• External components/software
• Generating Pulses
• With PSoC PWM interrupts
• Raspberry Pi Pico State Machine
• Receiving Pulse
• Raspberry Pi Pico using interrupts
Single Pulse Application Example
IR Receiver for Continuous Data Communication
• What works for RS-232 data transmission and why?
Project Utilising IR emitters/Receivers using RS-232 Communication
Reference

Sat. June 12, 2021 – Prototyping

9:30 AM to 11:30 AM PST

Jim will share with us his secrets in Prototyping projects, from concept to breadboarding, prototyping and printed circuit
board.

The discussion will touch on hardware/software tools used in each of the phases with focus on methods of prototyping and assembly.

See the presentation .pdf here.

9:30-10a Cocktails & Conversation
10a Presentations

Jitsi Virtual Meeting

https://meet.vinnythegeek.ca/vicpimakers


Please contact markg@vicpimakers.ca if you are having trouble connecting to the meeting server.

Sat. Mar. 13, 2021 – Hardware Containers

Now that you have the world’s most useful project, it is time to package it up so the world doesn’t break it. We’ll discuss using different packaging containers to protect your project.

9:30 AM to 11:30 AM PST

Jitsi Virtual Meeting

https://meet.vinnythegeek.ca/vicpimakers
Please contact markg@vicpimakers.ca if you are having trouble connecting to the meeting server.

George’s packaging presentation: https://docs.google.com/document/d/1ivUou7D7rNFYmZPl1GAi4F6A5dP52ewsqoxxl0eUt5c

Deid’s packaging presentation: http://drsol.com/~deid/pi/packaging/

Postponed – Projects and Challenges

Due to the current situation @ March 14, 2020, in-person meetings have been suspended until further notice. Please do join us on Slack or at our online learning sessions using Jitsi. Write to hello at vicpimakers.ca for invitations and information.

Q-CollegeSuite 303 771 Vernon Ave · Victoria, BC – 10am

1) Hack Challenge, by George
Modify a window alarm to be a useful or entertaining device. Window alarms to be supplied free March 14th, one per attendee.

2) Hack Challenge, by Deid
New “Christmas Light” patterns

3) … bring projects that you want to share or need help with… If you like, email a description to be added to this page.

It is fun to repurpose battery powered consumer products.  For instance, here is a Leak Detector made from a window alarm.  The article includes the window alarm schematic.  

And George made a bike theft deterrent alarm with remote radio alerting from the same window alarm.

In normal operation, the window alarm senses separation from its external magnet via its internal reed switch and feeds its piezo disk with an oscillation.  The window alarm runs on 3 button cells and draws no current when the reed switch is open. There is also a slide switch to enable/disable the alarm.

Here is a photo of the circuit board:  The OUT signal from the 8 pin oscillator chip is a 10V DC wave, pumped up by the inductor from 5 volts. A voltage divider can be added to lower this chip output signal to less than 5v to feed another device.    

Or the piezo can be used as a microphone, providing about 100mv into a very high impedance input

In May we can show what we achieved.

New “Christmas Light” patterns

Deid successfully connected a 50 light string of addressable LEDs to an ESP8266 to cause the lights to light and change colour and move and …

Deid created the following patterns:

  • Primary
  • Random
  • Web Safe
  • Follow
  • Lead
  • Random On ***
  • All On
  • All Off
  • Rainbow
  • Moving
  • Colour
  • Christmas
  • Rainbow Group
  • Dual Colour ***
    *** Shown in the images

The ESP8266 C code to do this can be found here.  Deid makes no representation that the existing code is good.  In fact he knows some of it is not. Feel free to fix.

The challenge is to add more patterns and the code to implement the patterns.  If you send Deid the code he will load and try the code. Unless someone comes up with a better way for folks to test remotely.


Saturday, Jan 11, 2020 – Amateur Radio

Using Nexus DR-S hat on your Pi to control your Amateur Radio. Nexus DR-X (aka: DigiLink) is a digital radio cross patch that allows you to link the Raspberry Pi sound card of your choice to nearly any amateur radio transceiver to enable perfect digital data communications.

The Buster RPI image includes a host of Ham apps and a simple dialog box that makes updating and installing your favorite programs easy. Deid’s presentation notes are here.

10:00 AM – 12:00PM
Q College Suite 303 771 Vernon Ave · Victoria, BC

Sat, Nov 23, 2019 -Electrical measurements in the unsteady state

10:00 AM to 12:00 PM

Learn how to measure the electrical world using your embedded device. In this talk, we’ll answer the following, and show you lots of cool stuff:

  • When does Ohm’s law apply?
  • Measuring inductance and capacitance, and formulas for these
  • Recording transient currents when a motor starts and stops.
  • Protecting devices with inrush current limiters and transient suppressors.

Camosun College Interurban Campus
4461 Interurban Road · Victoria, BC
Tech Bldg, Tech 177

Intro to Pi and Others: Part 4

Light it up!

Tuesday, May 21, 2019
6:00 PM to 7:30 PM
Q-College
Suite 303 771 Vernon Ave · Victoria, BC

Intro to Pi & Others is a 4 part series of short monthly sessions to help get you up and running with your Pi or Other (embedded device). It is a structured hour-long session where you can ask questions.

Please bring in your Pi, HDMI cable, and power supply. All other equipment will be provided.

This is a four-part series with each session building on the previous sessions, where Pi basics of software and hardware will be explored. Read More

Intro to Pi & Others Part 3

Light it up!

Tuesday, May 7, 2019
6:00 PM to 7:30 PM
Q-College
Suite 303 771 Vernon Ave · Victoria, BC

Intro to Pi & Others is a 4 part series of short monthly sessions to help get you up and running with your Pi or Other (embedded device). It is a structured hour-long session where you can ask questions.

Please bring in your Pi, HDMI cable, and power supply. All other equipment will be provided.

This is a four-part series with each session building on the previous sessions, where Pi basics of software and hardware will be explored. Read More

February 9, 2019 – Project Day

raspberry pi

VicPiMakers will be supporting Projects in 2019. What are Projects? Deid’s pond is a project, for example. If you have a project idea, bring it in and we’ll see how we can help you complete your project.

George Bowden – Timed Lock
Heidi Bada – Intro – https://badadigitalmarketing.com/piprojects/
Ideas
Phillips Hue – timed dim/colour
Weather Sensors
Wearable Sensors in sport
Home Safety –
Flow sensor in toilet
Launchpad pro using python – Open Firmware project
Environmental Sensors – birdfeeder motion (wisecam), soil moisture
Pi version of “the clapper”
Eileen & Cody – Space Station Light & Sound – https://github.com/cozyhost/
Plan on lighting Neo Pixels
Peter Sprague – Packet Radio Satellite tracker
Portable, run in truck
Moved from Pi, to FreeBSD
Dan Willis – LED running as a Canadian flag flying
Weatherproof boxes outside

10:00am
Q-College, Suite 303 – 771 Vernon Ave, Victoria, BC

Contact projects at vicpimakers dot ca to share your project on our next Project Day.