Seven segment LED display TM1637 interfacing
with Arduino, Node MCU, ESP32
There is a seven segment LED display TM1637 connected to Micro-controller on I2C bus. We can display any values we wish on this. TM1637 only uses four pins which makes it a very convenient choice of use.
CLK Pin: The Clock pin helps to keep the clock pulse sync in with module and microcontroller.
GND: The ground (GND) is pin to make the common ground with external devices.
VCC: The power (VCC) input pin to power the module. Accepts 3.3-5V VCC.
DIO: The data pin helps in sending and receiving data from the microcontroller.
The module TM1637 gives the 8 luminance levels which are adjustable through the programming.
The device operates on both 3.3V and 5V.
The TM1637 module consists of two parts; the first is a 4-digit 7-segment display and the second one is the TM1637 7-Segment Display Driver IC. The IC supports many functionalities including on-off and brightness control. This IC also has a data queue which means that you can send all the data packets to the IC and the IC will display all the information sequentially, giving headroom to your microcontroller for other tasks.
TM1637 4-Digit 7-Segment Display Module Circuit Diagram is very simple and needs a couple of components to work properly. The main component of the module is the TM1637 IC and the display module. Other than that, we need 4 capacitors and two resistors and that’s all for the components required to build the circuit.
Interfacing Seven Segment LED display TM1637 with Arduino:
VCC and GND of TM1637 is interfaced with Arduino 5 volts DC and ground pin.
CLK (Clock) is connected to SCL Pin of Arduino and DIO is connected to SDA (Data) pin of Arduino.
Interfacing Seven Segment LED display TM1637 with Node MCU:
VCC and GND of TM1637 is interfaced with Node MCU 3.3 volts DC and ground pin.
CLK (Clock) is connected to SCL Pin GPIO5 of Node MCU and DIO is connected to SDA (Data) pin GPIO4 of Node MCU.
Interfacing Seven Segment LED display TM1637 with ESP32:
VCC and GND of TM1637 is interfaced with ESP32 3.3 volts DC and ground pin.
CLK (Clock) is connected to SCL Pin GPIO22 of ESP32 and DIO is connected to SDA (Data) pin GPIO21 of ESP32.