My setting for the GoPro is 1 picture each 2 seconds for a 360° timelapse; This will result in a video of 1 minute.
If you want to make a partial timelapse (180°), take 1 picture every second
I glued the bottom of the kitchen timer on the removable spare shoe of my tripod, and on the top I glued a GoPro mount.
I used this:
Ikea Ordning Timer, Stainless Steel
For the timer to signal, wind it up by turning it clockwise half a turn
Never turn the timer counter-clockwise as this can damage the movement
Designer: IKEA of Sweden
Price: $16.99
Velbon EX Macro 3-Section Tripod with 3 Way Pan & Tilt Head/QR Plate
Maximum Extension: 22.17 inches
Folded Length: 11.06 inches
Minimum Operating Height: 7.99 inches
Price: $143.52
Velbon QB-4LC Quick Release Platform
QB-4LC fits Tripod: 400, 5000, CX-430 CX-440, DF-10ML, DF-40, T-3500 Videomate 400
Length=45mm;Width=45mm
Price: $17.95