A Totally Reto Mode makes a comeback


Since the inception of ham radio until the early 2000s, the licensing of an individual to become a ham radio operator has required an examination in sending and receiving international Morse code, CW, or “continuous wave” (as opposed to spark transmissions, which were intermittent). The reason for this was that the on/off nature of Morse code was reliable, needing the minimum of technology to implement, and that frequency stability and selectivity of early radios did not facilitate voice transmission and reception. There are many quant videos of military training films for Morse code instruction. To put it simply (which I try to do, sometimes too simply), almost any individual — especially one with musical ability — can learn Morse code in about two weeks to the five words per minute level (WPM), and about six weeks to the 13 WPM level.

I am KD8VON.  I have struggled to learn Morse Code for a few years now.  Nice to see that the effort wasn’t wasted.

Recently I did a DIY project on my YouTube channel changing the standard “Hello World” blink script for Arduino to be just a little different for those amateur radio operators who know the Morse.

GMH 053 DIY a better Arduino blink sketch, Hello World, Ham style

Please visit my channel and Subscribe if you like this video or you are a Ham.

Via: Nuts & Volts Match 2017 Issue



GMH 053 Project Build a better Arduino blink sketch, Hello World, Ham style

Hello from KD8VON. The standard Arduino blink sketch used to confirm your Arduino board is working is just too boring. Being an Amateur Radio Geek I wrote this sketch to blink hello world out in Morse code.

Who knows Morse code? Some amateur radio operator, some pilots and a few Geeks like me.

This video and sketch are dedicated to Harvey Ernst who introduced me to Ham radio and electronics back when I was 13. Thank you.

—– Links —-

GitHub link to the HelloWorld Arduino sketch

I hope you enjoyed this video and if you liked it or my escapades then click on that LIKE button.  Any questions or feedback is greatly appreciated.

I have a companion blog https://GeekMustHave.com where I preach technology.

Do a Geek a favor and subscribe to my YouTube channel. I would really appreciate it.

Now… go build something… go code something


GMH 052 Project Build Keep your Corp PC awake aka ImF15

Keep that corporate PC from going to sleep after inactivity. This video is a beginners introduction to the Arduino IDE,. ATTiny85, and the special sketch named (ImF15) that presses the F15 once a minute to keep your PC awake.

Make the ATtiny look like a standard type keyboard by using the proper VID/PID combination.

Depending on your skill level you can skip to
5:30 – Add Attiny to Arduino IDE
11:50 – The ImF15 sketch code.

Beware of the clones. Some fake ATTiny’s will cause issues on some systems.

——— LINKS ———-

Caffeine software (Zhorn) donation based

ATtiny board manager JSON

DigiSpark/Arduino drivers and GitHub code library

GitHub location for ImF15 sketch

I hope you enjoyed this video and if you liked it or my escapades then click on that LIKE button.

Any questions or feedback is greatly appreciated.

I have a companion blog https://GeekMustHave.com where I preach technology.

Do a Geek a favor and subscribe to my YouTube channel. I would really appreciate it.

Now… go build something.

GMH 040 Postbag Soldering Pad, ATTiny167, ATMega32U4, ESP8266, Mega 2650

The Adafruit package will be opened in another Postbag video.

Soldering Pad Heat-resistant Heat Gun BGA Soldering Station Repair Insulation Insulator Pad Desk Mat Maintenance For Platform $4.54


5V 8W Mini Portable USB Electric Powered Soldering Iron Pen Tip with Touch Switch Protective Cap $6.19


L298N Dual H-Bridge Stepper Motor Driver Board For Arduino $1.42


ESP8266 Web Sever serial WiFi expansion board shield ESP-12E for UNO r3UNO R3 DIY $5.20


3.2 inch TFT LCD module Ultra HD 320X480 + MEGA 2560 R3 Board and SD Card slot+ USB Cable $13.78


0.96 I2C IIC SPI Serial 128X64 Blue and Yellow OLED LCD LED Display Module for $2.80


CP2102 USB 2.0 to UART TTL 5PIN Connector Module Serial Converter with Dupont lin $1.35


Experimental 9V battery snap power cable to DC 9V clip male line battery adapter for UNO r3 DIY $0.70 / 5 module with 2-row pin header For Leonardo 1PCS $3.18

New Pro Micro ATmega32U4 5V/16MHz Module with 2 row pin header For Leonardo 1PCS $3.50


5PCS 2 Channel IIC I2C Logic Level Converter Bi-Directional Module 5V to 3.3V $1.40 5 units


Digispark Pro Kickstarter development board use Micro ATTINY167 module for uail $3.50


I hope you enjoyed this video and if you liked it or my escapades then click on that LIKE button.

Any questions or feedback is greatly appreciated.

I have a companion blog https://GeekMustHave.com where I preach technology.

Do a Geek a favor and subscribe to my YouTube channel. I would really appreciate it.

Now… go build something… remember measure twice


GMH 026 NSFW Postbag Wine Corker, Servos, SBC Cases, Logic converters

GMH 026 NSFW Postbag Wine Corker, Servos, SBC Cases, Logic converters

Plastic Red happy man Wine Bottle Stoppers Kitchen Bar Tools fit general wine bottles


100% NEW Wholesale SG90 9G Micro Servo Motor For Robot 6CH RC Helicopter Airplane Controls for Arduino


This is the most popular mini servo. Only weighs 9 gram and gives you a 1.5kg.cm torque. Pretty strong regarding its size. Suitable for Beam type robot.

Operating speed: 0.3second/ 60degree
Stall Torque : 1.5kg/cm

High-Quality Metal gear Digital Servos MG90S 9g Servo Upgraded SG90 For Rc Robot Helicopter Airplane mg995 mg90


Metal Gear
Full Ball Bearing
Stall Torque : 1.8kg/cm(4.8V )2.2kg/cm(6V)
Operating Speed : 0.1sec/60degree(4.8v),0.08sec/60degree(6v)

SG5010 High Torque Digital Servo Motor RC Robot for Arduino UNO R3


Coreless motor and double ball bearing.
Operating speed (4.8V no load): 0.14sec/60 degrees
Operating speed (6.0V no load): 0.11sec/60 degrees
Stall torque (4.8V): (8kg/cm) (110oz/in.)
Stall torque (6.0V): (11kg/cm) (156oz/in.)

Best Price Enclosure Transparent Gloss Acrylic Box Clear Cover Compatible For Arduino Mega 2560 R3 Case UNO


Hot Raspberry Pi 3 Transparent Acrylic Case Protective Cover Box with Mini Fan for Raspberry Pi 2 Model B and B+ (B Plus) Board


Mini Fan:
Suitable for Raspberry Pi B / Raspberry Pi B+ / Raspberry Pi A+ / Raspberry Pi 2

4-channel Bi-Directional Logic Level Shifter Converter 3.3V 5V for Arduino TE291


If you’ve ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. the bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time.


GMH-015 Postbag Platic Box, NodeMCU HUZZAH feather board, TV-B-Gone Kit

Adafruit HUZZAH ESP8266 Breakout

Add the Internet to your next project with an adorable, bite-sized WiFi microcontroller, at a price you like! The ESP8266 processor from Espressif is an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) and TCP/IP stack with DNS support as well. While this chip has been very popular, it’s also been very difficult to use. Most of the low-cost modules are not breadboard friendly, don’t have an onboard 500mA 3.3V regulator or level shifting, and aren’t CE or FCC emitter certified….UNTIL NOW!

Each module comes pre-loaded with NodeMCU’s Lua interpreter (NodeMCU 0.9.5 build 20150318 / Lua 5.1.4 to be specific), you can run commands, and ‘save’ Lua programs directly to the module’s Flash using a USB-Serial converter cable. But, if you’d like, you can skip Lua and go direct to using the Arduino IDE. Once you download the ESP8266 core, you can treat it just like a microcontroller+WiFi board, no other processors needed!
Adafruit TV BeGone TV-B-Gone Kit – Universal v1.2

When we were putting together the TV-B-Gone kit, we started imagining a dystopian future, filled with televisions, where this kit would be super useful and we’d be a hero for having one. And while maybe that’s dramatic, the TV-B-Gone is perfect for playing pranks on your friends during the Super Bowl or getting some peace and quiet during dinner.
Feather Stacking Headers – 12-pin and 16-pin female headers

These two Female Stacking Headers alone are, well, lonely. But pair them with any of our Feather boards and you’re in business!
What do they do? They stack. Put the headers through your Feather and then you can not only plug them into a solderless breadboard, but you could attach circuitry on top as well


GMH-014 Postbag – Buttons, LoRa, USB Soldering Iron, UNO & Display

GMH-014 Postbag – Buttons, LoRa, USB Soldering Iron, UNO & Display

This video is a postbag of buttons, LoRa transceivers, USB soldering iron and an UNO with Display.  Please excuse the length and editing, this is my first attempt at a postbag with more items than should be covered in a single video. I will split up large postbags in the future into multiple videos.

UXCELL JST Connectors

No longer available from the vendor I bought the last of them from them, here is an alternative link.

MCX Male to BNC Female Adapter pigtail adapter


Tactile square push buttons 12mm x 12mm with various color caps


LoRa Radio Modules 915 MHz 100mW RF wireless


Keyestudio UNO R3 development board


Keyestudio display shield 20 char by 4 lines White on blue


Andreas Spiess, the guy with the Swiss accent.

#120 LoRa / LoRaWAN World Record Attempt. Will I succeed?

USB Soldering Iron 5VDC 8 watts

Page no longer available, alternative link


Julian Letts review on the soldering iron.