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 you duff and build something!
Training the hand and mind since 1982.

Tuesday, January 3, 2017

Laser Cutter

Just got the laser cutter up and running. Thanks to Electrical, HVAC and MFW, they ran all the electric and vents to the outside. Here are some pics

Above Epilog Fusion 30x20 Bed 60 Watt CO2

 Here is a sign example, we used a 6x12 inch oak board, light spray paint and then sanded

Here is a 1/8 inch acrylic plastic sheet cut to our line following robot, we assemble this project in the 9th grade.

Here is an video of the sign etching

Monday, December 5, 2016

Friday, May 6, 2016


TDA7375 Power Amp Project  

Make Sure all holes are correct size
 for RCA and Green Screw Connector

 Install LEFT RCA RED connector

Install RIGHT RCA WHITE connector


Install 10 K Ohm Resistor

Install .39uF Cap

Install second .39uF Cap

 Install 47uF Cap - side left

 Install 100uF Cap

 Green Screw Connector
Open side facing LEFT

 Green Screw Connector
Open side facing LEFT
 Green Screw Connector
Open side facing RIGHT

 Green Screw Connector
Open side facing RIGHT

Install TDA7375

Mark Heatsink

 Mark Heatsink

Drill and Tap 4-10

Monday, January 18, 2016

FTDI Cable to Bluetooth HC-05 Programmer

Here is a board that can program the HC-05 Bluetooth Module using AT commands.

All that is needed is a momentary reset switch and a SPST and a resistor. Didn't bother with a PCB because it would be one of a kind to program about (40) BT Modules. With the blimp project we need to rename each module to prevent confusion, Stock name is set for HC-05.

Steps to rename HC-05 Bluetooth Module
Open the Arduino IDE
Setup correct comm port that the FTDI cable is on
Select tools and open Serial Monitor
Set for 38,400 Baud

Set Switch to PROG
Push Reset Switch to place HC-05 Board to AT Command Mode
Type AT
Should reply back OK
Should reply back HC-05
Type AT+NAME=(new name here)
Should reply back (new name here)
Set Switch to RUN
Push Reset

Schematic Coming Soon!