First tests of accelerometer ADXL335 using I2C controlled 20×4 LCD
For the tests I used already installed for 16×2 display module LiquidCrystal_I2C library (see distance meter and other posts)
The accelerometer IC itself is described on Analog Devices and has pretty simple interface when mounted on GY-61 board. There are just 3 connectors for each direction acceleration analog signals and power. It seems that one can power GY-61 module with 5V but I sticked to 3v3 and also used it as the reference voltage for analog input. Continue reading ADXL335 I2C 2004 LCD
DS3231 clock with AT24C32 memory connected to TM1637 controlled 4digits 7segment display. This is first step in using DS3231 clock – see also next steps with 8 digits 7 segment display and with use of internal timer interrupts and with combining two display types)
As you can see all setup was arranged on Proto Shield with SYB-170 breadboard. This way, it can be easily dismounted from UNO base, and left aside. Then, once you want to use UNO board for another project you can take it, and once you want return to this one, the shield has to be slided onto UNO, code written back to the board, and everything works back again :-). As I often switch between the projects, I do like this approac, and have at least 2 proto shields loaded with some parts and finished_but_may_return_to projects on them 🙂 )
Continue reading DS3231 AT24C32 TM1637 4digits
13.56MHz RFID reader RC522 with optional LCD 16×02 (1602) module and dual color diode connected.
Basic setup with just UNO and reader connected – see below. The code for such case with reading tags and using Serial output could be located in AddicoreRFID library.
Continue reading RFID RC522 test