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.

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.

Tuesday, October 23, 2018

White board broken

Today we received our new white board with a damaged rail, we desperately needed it for our classes, so we decided to fix it. Thanks to my senior H.P. we got the rail repaired. We also had to figure out how to mount it, it wasn't easy we had to machine a few parts to hang the board. It was a great engineering project which made us think outside the box.

Friday, October 19, 2018

Poor solder Joint Example

Hello, this post is for my exploratory freshmen, this is a great example of a poor solder joints on the Simon project. On your first two components please have one of the instructors examine your soldering joints so we can correct it before it gets worst. Thank you and remember the three second rule.

notice shorts, cold solder joints and burn marks.

Saturday, October 13, 2018

Ready for open house

Come on down! Open house starts in a few minutes. Talk with our student and see all of our amazing projects! We also have a special gift for you, thanking you for coming. You can even assemble it with your own hands!