How do I connect the VMA 301 RTC to my arduino uno?

Velleman IO Sensors and Actuators
1

Hello, how do I connect a VMA 301 real time clock to my arduino uno? On the internet I only find the schematic for the arduino mega. It has 5 ports: RST, DAT, CLK, GND, VCC

2

This doesn’t matter.
I suggest pin 6,7,8 and change the pins in the example program.

3

Arent those digital output pins on the Arduino uno?
I would have thought that SCLK = A5, DAT = A4, and CE = ??.

Can you help explain?

4

Hi
Yes sure. The IC DS1302 uses SPI as communication protocol.
A5 and A4 are used for the I2C protocol. You can use any pin with SPI as for I2C dedicated hardware is needed

5

#define CE_PIN 5 // Chip Enable
#define IO_PIN 6 // Input/Output
#define SC_PIN 7 // Serial Clock

I did use these pins for the DS1302(digital pins)