490IP1 - Russian LED display for avionics and military applications

Some time ago, I purchased interesting russian LED digital display 490IP1 (К490ИП1) from Ebay. According to information from seller, it was used mostly in avionics and military applications because of the small size. This display measures only 12mm x 5mm!

Now, how to hook it up to a microcontroller? 490IP1 has only few pins for control, so after some experiments I found that:

pin#9 -DOT control

pin#2 -Display Blank

pin#6 -Reset

pin#7 -Count

pin#1 -Display power 5V

pin#5 -Logic power 5V

pin#8 -GND

You may think that this is something like HDSP1414 or NSM1416 because it has some control logic inside but it appears that 490IP1 is a simple decade counter with separate power for display itself and control logic! Just apply reset to start then toggle count pin until desired digit is reached, you can also turn off the display during the count with pin#2. I believe these displays are stackable and you can use pin#4 for this purpose. Basically control looks similar to TIL307 but display features are significantly reduced comparing to Texas Instruments TIL307 version.

CY8CKIT-042 kit from Cypress was selected for this experiment as it has 5V tolerant MCU. Simple test code.

Picture from datasheet:

Video

IGT1-203 Self Scan bar graph display

Another bunch arrived on my workbench, my recent eBay purchase, IGT1-203 plasma bar graph display. This is single channel self scan plasma display with a working principle similar to  PBG12201  panel indicator (Love that glow in the dark!). IGT1-203  has   5 scan  cathodes, one reset  segment/cathode, one anode for linear control, and two keep-alive pins. 

Simple STM8 library was written to drive this IGT1-203 display panel.  It  uses  one  ADC channel, TIM4 scan  timer and embedded IDWG  watchdog for better stability.

 Schematic is pretty simple:

Video

S35190 3-wire RTC clock library for STM8003F3U6

S35190  is  a   3-wire  real-time  clock  IC with automatic time correction feature (hardware compensation). This is very useful option because  most  of  RTC crystals are not precise and require calibration or external  trimmer capacitor.

 

This simple  library  was  developed  on  STVD  4.3.6, built with Cosmic compiler. Reads/writes year, date & time, UART is pushing out the data.

PCB with 2x2 mm RTC S35190 timer and 3x3mm STM8003F3U6 micro-controller.
Library.

Thingspeak with ESP8266 board

Thingspeak  allows  you store your data in the cloud  and do calculations. This is very useful  because  large  data from sensors always available online without microcontroller memory waste.

Looking  at  some  of the examples for ESP8266 processor I was able to get  this board stream data directly to Thingspeak.

Here is my feed with the temperature,   pressure   (BMP280),   magnetometer  (MAG3110), humidity   (CC2D33)   and   light   sensor  (BH1750)  data.