Real-Time Clock Bricklet¶

Features¶

• Battery-backed real-time clock
• Hundredth of a second time resolution
• Low power consumption in battery mode

Description¶

The battery-backed Real-Time Clock Bricklet can be used to extend the features of Bricks with the capability to accurately keep date and time over long time periods even if the Brick is not constantly powered.

This Bricklet can also be used to keep the system time of a RED Brick (using this example program) or a Raspberry Pi.

Technical Specifications¶

* datasheet value

Resources¶

• PCF85263A datasheet (Download)
• Schematic (Download)
• Outline and drilling plan (Download)
• Source code and design files (Download)
• 3D model (View online | Download: STEP, FreeCAD)

Test your Real-Time Clock Bricklet¶

To test a Real-Time Clock Bricklet you need to have Brick Daemon and Brick Viewer installed. Brick Daemon acts as a proxy between the USB interface of the Bricks and the API bindings. Brick Viewer connects to Brick Daemon. It helps to figure out basic information about the connected Bricks and Bricklets and allows to test them.

Connect the Real-Time Clock Bricklet to a Brick with a Bricklet Cable.

If you connect the Brick to the PC over USB, you should see a new tab named "Real-Time Clock Bricklet" in the Brick Viewer after a moment. Select this tab. If everything went as expected you can now see the Bricklet's and the local date and time counting up.

You can set the Bricklet's date and time you your local time by clicking the "Save Local" button.

After this test you can go on with writing your own application. See the Programming Interface section for the API of the Real-Time Clock Bricklet and examples in different programming languages.

Case¶

A laser-cut case for the Real-Time Clock Bricklet is available.

The assembly is easiest if you follow the following steps:

• Screw spacers to the Bricklet,
• screw bottom plate to bottom spacers,
• build up side plates,
• plug side plates into bottom plate and
• screw top plate to top spacers.

Below you can see an exploded assembly drawing of the Real-Time Clock Bricklet case:

Hint: There is a protective film on both sides of the plates, you have to remove it before assembly.

Programming Interface¶

See Programming Interface for a detailed description.