WD0AJG's Ham Rado Daily

Monday, September 9, 2019

Fwd: Building a Programmable Thermostat with a Nextion Display, Designing Antenna Systems, Single-Chip Four Channel Datalogger, Calculators as Coprocessors




Newsletter #137
 
 

BUILDING A PROGRAMMABLE THERMOSTAT WITH A NEXTION LCD DISPLAY
Customizing a thermostat for a simple forced air heating/cooling system.

 

I realized there were several things I wanted to learn about thermostats. I determined to do some studying and then build one of my own design. Here's what I did.

 

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DESIGNING ANTENNA SYSTEMS
The radio antenna and its role in a radio system.

 

Here are some thoughts on assembling a radio antenna system with a focus on reducing the known variants that are usually either overlooked or that can creep in when you're not looking.

 
 

Single-Chip, Four Channel Datalogger
A simple data logging circuit for many applications.

 

This inexpensive datalogger is suitable for just about any application where a small, cheap, low power circuit is needed to sample analog voltages, convert them to digital values, and store a modest amount of data in non-volatile memory.

 

CALCULATORS AS COPROCESSORS
Turn a TI calculator into a computing machine.

 

Connect Texas Instruments calculators to Arduinos to extend this open source prototyping platform's computing power for math functions and to make graphic capabilities easier to implement.

 
 
 
 

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