Data Sheet

Introduction: The STOP:bit is a bolt-on/clip-on board for the BBC micro:bit replicating a
traffic light. The PCB has been designed to have the same physical features of a traffic
light, with the addition of a BBC micro:bit as the pedestrian crossing control box.
Layout & !
Dimensions:
Software: Custom MAKECODE blocks
have been created. They are available at:
https://github.com/KitronikLtd/pxt-
kitronik-stopbit
It is also possible to use the ‘digital write
pin’ block to operate the LEDs.
STOP:bit for the BBC micro:bit
www.kitronik.co.uk/5642
Pinout
P0
Red LED
P1
Yellow LED
P2
Green LED
LEDs: The STOP:bit has 3 10mm LEDs (1 Red, 1
Yellow, 1 Green). Each of these LEDs is driven from
one of the BBC micro:bit IO pins. The table to the
right gives the connections between the LEDs and the
IO pins.
P0 / Red LED pin
Yellow LED
10mm dia
Green LED
10mm dia
Red LED
10mm dia
Snap-off
base stand
P1 / Yellow LED pin
P2 / Green LED pin
0V
1.6mm
14mm
120mm
38mm
10mm
54mm
20mm
Connection: x5 M3 countersunk screws allow the
user to bolt the STOP:bit onto the BBC micro:bit.
Crocodile clips also can be used between the pads
on the STOP:bit and the matching pads on the BBC
micro:bit.
Stand: The bottom section of the STOP:bit PCB is
designed to break off and then slot together with
the main PCB to form a stable cross base.
Power: Power is supplied from the BBC micro:bit connections
3V (Not connected)