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1st Cobargo Scout Group

Scouts
NSW

  JOTA/JOTI Electronics projects and Team Building projects


Stuck for Ideas for an electronics project for JOTA/JOTI?

Looking for a robust project designed with the soldering ability of youth members in mind?

Want to be able to customise it with your own group name?

Would you like to reduce kit costs, and board failure?

Sick of rewriting assembly documentation to suit youth members?

Then look no further.


Alternative to commercially available kits.

There are many excellent commercial kits available, but they are not really designed to last. After using commercially available kits for many years, Cobargo Scouts switched to our own custom designed kits. The following are just some of the design principles used to make them faster to assemble, longer lasting, lower assembly failure rate, and reduced kit costs.


Design principles.

Full list of design principles used in these projects


What we are offering.

We are not selling/supplying the kits. What we are offering is the Intellectual property for these projects to Scout Groups including the following.


Included Documentation and design files for each project. PCB Design Files

Original design files, (including Schematic, and PCB)so that you can customise the artwork and order the boards yourself. The files have been designed using Easyeda online pcb design.



All Projects are suitable for all Scout Sections

These projects are suitable for all Sections within Scouts. With some of the more complex projects where they have a lot of components - e.g "Get to 9", it works better if you presolder some of the components for the younger sections. In 2022 we built the "Get to 9" kit and pre-soldered just the IC sockets and resistor networks for the Joeys, and Younger Cubs. This left them with still quite a few components to solder in, but it reduced the activity length time so that it was not too long and they did not loose interest, and they still felt that sense of accomplishment in building the kits. It is recommended that when Joeys and Cubs are building these kits, that you have adequate supervision. In this case we have a 1:1 ratio of youth member to someone supervising. Venturers are very good supervisors !!.



  JOTA/JOTI Projects to build

  5 Note Organ

A simple organ that plays 5 different notes based on a 555 timer. We used this project for the 1st time at JOTA/JOTI last year (2020)and it took youth members (Cubs, Scouts and Venturers) between 30-45 minutes to assemble, with no board failures and only one component failure as it had to be desoldered, and was broken in the process (this was out of 60 kits).


5 Note Organ Overview video



Documentation

Component Sorter
Assembly instructions
How it Works
Instructor Guide
Parts List
PCB and Schematics



  The Irritator

Works like a Theremin, but using light to vary the pitch, based on a 555 timer. Its a really annoying sound, hence the name.

The Irritator video




Documentation

Component Sorter
Assembly instructions
How it Works
Instructor Guide
Parts List
PCB and Schematics



  LED Flasher Version 1

Flashes a single diffused LED, should run continuously for at least 2 years, based on a 7555 ic.


Documentation

Component Sorter
Assembly instructions
How it Works
Instructor Guide
Parts list
PCB and Schematics





  LED Flasher - Version 2 (compact version)

Flashes a single diffused LED, should run continuously for at least 2 years, based on a 7555 ic. The battery holder is on the back of the board in this version, making it more compact, stand up on its own, chaper to make and better protection for fingers from the pins on the back.

Documentation

Component Sorter
Assembly instructions
How it Works
Instructor Guide
Parts list
PCB and Schematics





  Catch Me

Stop a flashing LED, by pressing the Catch button when the LED is on. Turn the potentionmeter to increase difficulty by making it flash faster.


Documentation

Component Sorter
Assembly instructions
Instructor Guide
Parts list
PCB and Schematics




  Get to 9

Press the Steps to 9 button when the LED is on, and the 7 Segment display will increase by 1. Press the button when the LED is off, and the display will reset to zero. The aim is to get to 9 on the display. Turn the potentionmeter to increase difficulty by making the LED flash faster.


Documentation

Component Sorter
Assembly instructions
Instructor Guide
Parts list
PCB and Schematics



  Blue Peak

This is an LDR based game. You play it by varying the amount of light falling on the LDR's to make the LED's flash left or right. If you can keep just the 2 green LED's illuminated then the blue LED will stay on.


Blue Peak video








  Tent Light

This tent light can easily illuminate a 2-3 person hiking tent. It will run off 1-AA Alkaline battery for 30-40 hours. Most hike tents have a loop in the centre and the tent light has a hook for hanging off the loop. If there is no loop, there is also a plastic alligator type clamp that can be used to attach it. It will often work better if its attached to the end of the tent so you are not shadowing it. It weighs about 45 grams.

Instructor Guide

NOTE: Please read the Instructor Guide completely for this project. It is a fairly simple project, but there is a number of different, LED and Switch options, as well as 4 different tapes that are required to complete this project.




Documentation

Component Sorter
Assembly instructions
Instructor Guide
Parts list
PCB and Schematics




  Firebug

The Firebug is a simulated fire that will run for at least 20 hours on 2AA batteries. It uses 4 Candle LEDS' and 2 Orange LEDS to simulate the flicker of a fire.

Instructor Guide

NOTE: Please read the Instructor Guide completely for this project. .



Firebug video





  Rock It

When the LED is on, rock the board to the right and the 7 Segment displays will increase by 1. Rock the board when the LED is off, and the display will reset to zero. The score can get up to 99 on the display. Turn the potentionmeter to increase difficulty by making the LED flash faster. This game requires a sence of rhythm to play.


NOTE: This is an advanced kit with a lot of parts. If you have Cubs and Joeys assembling this kit, it is highly recommended that you at least pre-solder the IC sockets, and maybe also the resistor networks in for them to reduce the time it takes to assemble it.





Documentation

Component Sorter
Assembly instructions
Instructor Guide
Parts list
PCB and Schematics


  Hypnotic

This is a very simple project, that involves 3 different colour flashing LED's. The 3 oscillators have the same value components, but as the components have slighly different tolerances, the LED's flash at slightly different rates. This creates different patterns where the LEDS will flash either from top to bottom, then reverse, then appear to flash randomly, and start all over again. Its quite mesmerising to look at. It should run for at least a year continously off the batteries.


NOTE: Please read the instructor guide for this project, in particular the section on Capacitor selection, otherwise the project will not work as intended.






Documentation

Component Sorter
Assembly instructions
Instructor Guide
Parts list
PCB and Schematics




  Don't Touch

This project involves carefully moving a loop of wire over another wire that has been bent into different shapes. The aim is to get from one end to the other without touching the wires together. If they touch, then the buzzer will sound and the 7 segment display will advance by one.


Don't Touch video




  Team Building Projects

The following Projects are designed as Patrol activities that can be used at JOTA/JOTI, or regional or State activities where the Patrol members have to work as a team to acheive a task

Please Note: - The projects are designed to be built by leaders, not youth members. The instructions assume that the assembler has quite an extensive knowledge of electronics and experience in building kits, and can work out the finer details. .




  Find Me

Find Me can either flash an LED, sound a single beep or both with an adjustable time interval from approx 6-40 seconds. It is designed more for leaders to use as a Sensory game for younger members, either indoors or outdoors, requiring those playing to carefully listen, look or both. The LED can easily be seen 100M away in the dark.






Documentation

Limited documentation is provided as it is only intended for Leaders to build these.


Assembly instructions
Parts list
PCB and Schematics


  433mhz Radio Fox Hunting

Want to run Radio Fox hunting but don't have the equipment or the necessary radio licence to run this activity. This kit runs on the 433MHZ frequency, which is in the ISM (industrial Scientific and medical) band, so does not need a licence to use, as long as the output is below a certain level.

  Interferance Warning

As this is on the 433MHZ frequency, you will need to be aware that they will interfere with other devices in the same band, such as car remotes, wireless doorbells etc. I have found that as you long as you keep the transmitters at least 20M (50M to be safe) away from other devices that it may interfere with then you will not have any issues. It best not to run these in a built up area.


  Documentation

Limited documentation is provided as it is only intended for Leaders to build these.


  Kit Overview - please read
  Transmitter Schematic
  Receiver Schematic
  Parts List
  Transmitter design file
  Receiver Design file

Fox hunting receiver video


  Move It Carefully

Move It Carefully is designed as a whole patrol activity. It has 6 switches, 3 that need to be pushed in, and three toggle switches that need to be held down. It also needs to be kept level.

Remove the start plug and the 7 segment display counts down in minutes and seconds (adjustable from 1 to 15 Minutes). It also "Ticks' and Beeps continuously if you let a switch go or tilt it, and the display will show the error. The Youth members then have to move the box to another location (setup an obstacle course), all while holding the switches in and keeping it all level.

They then need to plug in another plug at the end before the timer expires. They will get a Pass or Fail (timer dependant), and a score indicating the number of seconds it was not level or switches let go

You can strap out some of the switches or even the tilt sensor, to make it easier for younger members..

This project is based on a PIC 16F877A Microcontroller.

Move it Carefully Video





  Upcoming Projects


What this space for further projects




Contact for further information     venturers@cobargoscouts.org.au