29 August 2020

Neon Tester TS-990

›
My neon/nixie/gas-filled-tube tester homemade 5 years ago still works, but it is cumbersome to carry the device and a 12V battery when you n...
28 August 2020

Jam Replay Bluetooth speaker battery replacement

›
While I've been blog-silent this August 2020, I do have thought of electronics and done some repairs here and there. Like a relative...
25 July 2020

Independent glow from a Thyratron tube

›
Thyratron Glow! This is a self follow-up of a 2017 experiment with a low-pressure gas-filled vacuum tube, a Raytheon Thyratron 2051. [Well,...
23 July 2020

Lagomarsino Totalia LD-122

›
Totalia LD-122 calculator. According to the date I typed on the keypad, I have owned this Lagomarsino Totalia LD-122 calculator for one year...
11 July 2020

My current LoRA "DX" is 64 km

›
After few experiments with spread factor and the GP antenna, thanks to TTN Mapper service I can visualize which gateways have received my Lo...
10 July 2020

How to calculate LoRa GP antenna

›
Say you want to try a GP antenna on your LoRa module. How long should it be? A Ground-Plane antenna consist of 1 radiator and a number of el...
09 July 2020

LoRA GP antenna

›
N ow that I can map my LoRA signal, I can play with RF and try to get the most out of it. The most straightforward way is to use a better an...
07 July 2020

Simulating a LoRA node GPS position on TTN

›
A simple way to see your LoRAWAN node or gateway coverage is to use the TTN Mapper service. In order to get my node visible on TTN Mapper I...