Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off your duff and build something!
Training the hand and mind since 1982.

Sunday, May 12, 2019

Greetings Plymouth High School

Greetings Plymouth High School

The following is my electronic portfolio, some examples of engineering class work I have done.

Four Corners Challenge Project
The Four Corners Challenge Project is to operate efficiently, machines need their parts to fit precisely and to work together smoothly. The challenge is to build a machine out of cardboard that runs smoothly and dependably.
An example video is is listed below:
http://www.n1ir.com/2012/06/four-corners.html

Picture of Four Corners Challenge Project

Investigate tension and compression
In this project we built a paper bridge and chair prototypes out of paper. What shape makes the best bridge? Learn about how shape plays a role in designing sturdy structures.
An example video is is listed below:
http://www.n1ir.com/2012/06/investigate-tension-and-compression-in.html
 
Picture Investigate tension and compression

Blimp Jet Project
The Challenge si to add a jet-propulsion system so that a blimp flies straight and far under its own power.
An example video is is listed below:
http://www.n1ir.com/2012/07/the-blimp.html



Feel the Heat Project
In this project we designed and built a solar hot water heater and see how big a temperature change you can get.
An example video is is listed below
http://www.n1ir.com/2012/07/feel-heat.html


Below is examples of our Manufacturing Engineering Program


9th Grade Capstone Project
Line Following Robot Project - Design of a ultra fast line following robot project for student engineering technology project. Worked in conjunction with Electronics Engineering, Drafting and Precision Machine Technology provided a “canned” project. Robot would follow a black line (electrical tape) on the floor autonomously, via infrared led and infrared photo transistor. The engineering student program an algorithm in the Arduino. Students assemble the electronics and build a custom machined chassis and wheels. Students would “tune” the program to different track conditions.


10th Grade Capstone Project“Blimpy” Blue-tooth Controlled Blimp Project - Design of a ultra light modular control system for student engineering technology project. Worked in conjunction with Electronics Engineering, Drafting and Precision Machine Technology provided a “canned” project. Students assemble electronics and program the project, both in the Arduino IDE and a custom application on the cell phone using MIT APP inventor, scratch programming. Student would also design custom 3-d printed chassis in Solid Works
Online assembly instructions

TV-B-Gone
(Exploratory Project) – A universal remote control allows you to turn virtually any TV On or OFF. We prefer OFF. You control when you see TV, rather than what you see. The TV-B-Gone remote is so small that it easily fits in your pocket so that you have it handy whenever you need it, wherever you go: airports, restaurants, laundromats, etc. TV-B-Gone is a type of Universal Remote Control which works by shining pulses of invisible light that tells most any TV to turn OFF or On.

Online assembly instructions
 
http://www.n1ir.com/p/tv-b-gone.html

Exploratory Curriculumhttp://www.n1ir.com/p/exp2016.html
During our 5 day exploratory students build and take home ten unique projects. In an effort to reduce cost to the district I designed my own projects and documentation at a tenth of the cost of purchasing an off the shelf kit from a electronics supplier, Cost of my kits runs about $1.50 each.

        Resistor Triangle                       Resistor Square


        Resistor Cube                            Flashing LED


       Coin Decision Maker                Reaction Tester


        Insanity Alarm                          Continuity Tester



Example 11th Grade Curriculum Map

Related https://drive.google.com/open?id=0B4cPTBXMMjz9VjVmRjA2NkI0M3M

Shop https://drive.google.com/open?id=0B4cPTBXMMjz9VVBqQllodXZCS1U


Example Daily Lesson Plans

Related https://drive.google.com/open?id=0B4cPTBXMMjz9UTBsRU9oUlNieUE

Shop https://drive.google.com/open?id=0B4cPTBXMMjz9U1k5UlJRSjZuaDg


Please visit my You Tube Channel to see more projects and lessons
YOUTUBE Channel - https://www.youtube.com/user/chrisjohnson2003

Tuesday, April 30, 2019

Greetings Scituate High School

 Greetings Scituate High School


Below is examples of our program

9th Grade Capstone Project
Line Following Robot Project - Design of a ultra fast line following robot project for student engineering technology project. Worked in conjunction with Electronics Engineering, Drafting and Precision Machine Technology provided a “canned” project. Robot would follow a black line (electrical tape) on the floor autonomously, via infrared led and infrared photo transistor. The engineering student program an algorithm in the Arduino. Students assemble the electronics and build a custom machined chassis and wheels. Students would “tune” the program to different track conditions.


10th Grade Capstone Project“Blimpy” Blue-tooth Controlled Blimp Project - Design of a ultra light modular control system for student engineering technology project. Worked in conjunction with Electronics Engineering, Drafting and Precision Machine Technology provided a “canned” project. Students assemble electronics and program the project, both in the Arduino IDE and a custom application on the cell phone using MIT APP inventor, scratch programming. Student would also design custom 3-d printed chassis in Solid Works
Online assembly instructions

TV-B-Gone
(Exploratory Project) – A universal remote control allows you to turn virtually any TV On or OFF. We prefer OFF. You control when you see TV, rather than what you see. The TV-B-Gone remote is so small that it easily fits in your pocket so that you have it handy whenever you need it, wherever you go: airports, restaurants, laundromats, etc. TV-B-Gone is a type of Universal Remote Control which works by shining pulses of invisible light that tells most any TV to turn OFF or On.

Online assembly instructions
 
http://www.n1ir.com/p/tv-b-gone.html

Exploratory Curriculumhttp://www.n1ir.com/p/exp2016.html
During our 5 day exploratory students build and take home ten unique projects. In an effort to reduce cost to the district I designed my own projects and documentation at a tenth of the cost of purchasing an off the shelf kit from a electronics supplier, Cost of my kits runs about $1.50 each.

        Resistor Triangle                       Resistor Square


        Resistor Cube                            Flashing LED


       Coin Decision Maker                Reaction Tester


        Insanity Alarm                          Continuity Tester



Example 11th Grade Curriculum Map

Related https://drive.google.com/open?id=0B4cPTBXMMjz9VjVmRjA2NkI0M3M

Shop https://drive.google.com/open?id=0B4cPTBXMMjz9VVBqQllodXZCS1U


Example Daily Lesson Plans

Related https://drive.google.com/open?id=0B4cPTBXMMjz9UTBsRU9oUlNieUE

Shop https://drive.google.com/open?id=0B4cPTBXMMjz9U1k5UlJRSjZuaDg


Please visit my You Tube Channel to see more projects and lessons
YOUTUBE Channel - https://www.youtube.com/user/chrisjohnson2003

Friday, April 26, 2019

Greetings Barnstable County Sheriff

Greetings Barnstable County Sheriff,

Below is examples of some portfolio projects that I have done,

Click here to see my résumé


ELT/EPIRB Detector - Capstone Project

The design I came up with was a pager size device that would alert a pilot there ELT or Emergency Location Transmitter was on. A lot of time
NBEMS is Narrow Band Emergency Message System. Think back to your last public service event, drill, or deployment. You probably passed a lot of traffic best suited for voice communications but...What if you had been asked to pass Roster of evacuees, Required prescription medications, Directions to a disaster scene. The needs of our Served Agencies have changed. They still need voice communications but...There's an increasing need for data communications. We need to be able to provide more than just voice communications from a ham with an HT when we got called out to search for these ELT's they were false alarms in fact over 59 out of 60 of my documented finds were false activation's. I wanted to design a product that a pilot could wear or throw in his fight bag that if there was a signal on 121.500 Mhz (121.775 prototype) and was less than 200 feet away it would beep.
 Link below

Amateur radio saves lives!
On 9/25/2014 I received a distress call and saved a life! Mike a diabetic could not get up from his chair and called for help over amateur radio.
 
 Link below
 
Custom 2 Meter Radio Install
This was a custom install for a 2000 Toyota Camry with custom machined radio trunnion to a single DIN mount.

 
 Link below
  
Narrow Band Emergency Message System Interface
NBEMS is Narrow Band Emergency Message System. Think back to your last public service event, drill, or deployment. You probably passed a lot of traffic best suited for voice communications but...What if you had been asked to pass Roster of evacuees, Required prescription medications, Directions to a disaster scene. The needs of our Served Agencies have changed. They still need voice communications but...There's an increasing need for data communications. We need to be able to provide more than just voice communications from a ham with an HT

Link below

The Ignition Switch Delay for APRS node
"The Ignition Switch" featured in QST Aug09. This circuit provides protection against transient protection when starting your car and proves a delay off time for APRS equipment to send data before shut-down.


Link below

Pneumatic Antenna Launcher
This air-powered launcher is designed to launch sabot round over trees towing fishing line. The fishing line is used to pull up nylon twine and wire antennas, or heavier line and larger antennas. These launchers are used by Amateur Radio groups doing Emergency Service and other portable work, as well as installing antennas in backyard trees.

Link below


N1IR Tape Measure Beam Antenna
Here is an article I wrote for the next GARS Club Meeting. During the next club meeting on 3/26, we will be constructing Direction Finding (D.F.) antennas made from PVC pipe and steel tape measures, the nice thing about this antenna you can transmit on it as well with a pretty good SWR. A Kit is available for this antenna build just shoot me an email.
Link below


VOIP Echolink handheld microphone to PC interface
I wired up a Kenwood MC-58 to have more of a radio feel to Echolink.



Echo Link Demo Video
EchoLink is a computer-based Amateur Radio system distributed free of charge that allows radio amateurs to communicate with other amateur radio operators using Voice over IP (VoIP) technology on the Internet for at least part of the path between them. It was designed by Jonathan Taylor, a radio amateur with callsign K1RFD.




Astron Power Supply Fix
We were contacted by a local HAM radio operator that is blind about a power supply that runs his HF radio. The power supply was a ASTRON 30 and did not function. The students were excited about taking on this job, we troubleshot the problem down to a faulty regulator and bad crowbar circuit protection. The student got to learn about transistor Voltage Regulator and Silicon Controlled Rectifier used a a over voltage crowbar protection circuit.
Link below


Motorola GTX 900 Accessory Connector 
A write up on the Motorola GTX 900 Accessory Connector, our amateur radio club had bought a surplus lot of (50) GTX900 that I modified for 33CM amateur band
Link below
http://www.n1ir.com/2014/03/motorola-gtx-900-accessory-connector.html


Sealed Lead Acid Battery Monitor (SLAB_M)
This circuit was to monitor a Sealed Lead Acid Battery, if the battery drop below 10.6 volts a buzzer would sound. The challenge was to have a quiescent current smaller that the self discharge rate of the battery
Link below


Saturday, December 8, 2018

Student Made Video "How to Use Laser Cutter"

Very proud of my seniors, as an independent project they worked on a video for the shop to demonstrate How to Use Laser Cutter. This is a great instruction video and hope to see more. Thanks to TP,BD,PA and Bongo, you know who you are :)


Friday, December 7, 2018

555 Piano Organ Project

Hello, Here is a project that my sophomores are working on the 555 Piano Organ Project. It's a simple electronic toy piano can be easily constructed using the popular 555 timer IC. The NE555 timer IC was designed by Hans Camenzind in 1971. It consists of two threshold triggers, an RS flip-flop, and an output buffer. The 555 provides an easy, reliable way to create rectangular waveforms of adjustable pulse width and frequency by using different external component values.

Loudspeaker and Sound

A tone is a sound which is produced by a regular vibration. So it has only one frequency even though intensity/amplitude can vary. A Loudspeaker is an electronic transducer which converts electric signals to pressure variations to make the sensation of sound. To make this diaphragm of the loudspeaker will vibrate according to the frequency and amplitude of electric signals. Audible frequency range of humans is from 20Hz to 20KHz, so we are going to generate frequencies in this range using 555 timer and feed it to the loudspeaker.


Thursday, November 15, 2018

Students work on LCD TV

Hi just a posting were are fixing a 50 inch LCD TV. We found that the back-light LED was open, the left side of the LED strip behind the LCD had a bad LED. we tested the diver board and it was okay at 380 volts. The student learned how to troubleshoot high voltage power supplies safely, yes I did get a shock. Even with years of experience I get it once in a while, the important thing is keep one hand in your pocket while probing around high voltage, it can save your life.







Wednesday, November 7, 2018

Catastrophic failure of the FlashForge 3D Printer

Today we can across a Catastrophic failure of one of the FlashForge 3D Printers. The seniors (12th grade) students took it apart to find what the issues was. Unfortunately the head to the printer is beyond repair, another has been ordered and should be here in about one to two month. It was a great teaching point, we when over how plastic injectors worked and PID temperature controllers. We are going to make mechanical drawing in Solidworks and machine our own nozzles so we can have spares on hand.