KTM-S1201: 12 Digit 7-segment LCD display

original article !!

   Like SDA5708: 8 character 7x5 dot matrix LED display, this display is received as gift for test.

   KTM-S1201 display is drived by NEC D7225 (UPD7225G) chip and I found a very usefull article named Arduino and KTM-S1201 LCD modules

   I use also info from www.pongrance.com

   For control this display with Arduino sketch must download KTMS1201.h file and put in same directory with sketch:

and in Arduino IDE software you see:

   First step was to made a pcb for schematic with a 10..20k variable resistor for contrast:

   Schematic is made after nest info:

   Test schematic is:

   After upload the example sketches and few changes in sketches, on display I can see:

   After that, I made a new schematic with DHT22 (AM2302) sensor:

   I write a sketch named KTMS1201_DHT22.ino and on display I can see:

   I finished the schematic with RTC clock module (made with DS3231, but work fine with DS1307) and KY-040 rotary encoder:

After upload KTMS1201_DHT22_RTC_ver1m0.ino sketch, I cand see:

- hour:

- humidity and temperature:

- data, after a short push:

- change mode, first year, after a long push (3-4 seconds):

- change month:

- change day:

- change hours:

- change minutes:

   I made few movie:

- weather station with clock on KTM-S1201 display

- weather station with clock on KTM-S1201 display (2)

    Final sketch is KTMS1201_DHT22_RTC_ver1m1.ino and I use a changed KTMS1201.h file for C and Y letters:

   Finally, I change the sketch (see KTMS1201_DHT22_RTC_ver1m1b.ino) for another style for humidity: