Oh absolutely! Start by inviting AttendanceBot to a channel by /invite @attendancebot in that channel. 


1. To enable announcements for all punches, head to your settings panel by typing 'settings'-->Announcements & Notifications-->Channel Notifications Settings and set the toggle ON for the "In/out notifications" option


2. To enable announcements for all punches, set the toggle ON for the "Break notifications" option and hit "Update"



You can also announce punch card on the channel at a specific time of the day. 

Note: Enabling this would make the channel very noisy. Use with caution. You can always come back and disable this.