Elektor Team
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Dock for BBC micro:bit

“Base to micro:bit, you are cleared to dock.”

Dock for BBC micro:bit
There should be at least a million BBC micro:bits floating around the UK and other parts of the world right now. Though there are indeed many things you can do with a micro:bit, you have a somewhat limited user interface unless you get really good at writing Bluetooth-connected apps and take advantage of your smart phone.
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Component list
Component list
Resistor (1%, 0.1 W, 0603)
R3-R7,R17,R20,R23-R32 = 0Ohm
R19 = 0Ohm, not mounted
R16 = 100Ohm
R2,R9-R12,R33,R34 = 100kOhm
R13, R14, R18, R21, R22 = 150Ohm
R15 = 49.9Ohm (1206)
R1 = 698kOhm
R8 = 10kOhm potentiometer, linear
C1,C2,C4,C5,C6 = 1µF (0603)
C7,C8,C9 = any value, 1206, 0.85mm height
D2 = 1N5819HW-7-F
D1 = IR67-21C/TR8 (IR diode)
U1 = MCP1824-ADJE/OT
U2 = LCD NHD-C0220BiZ-FS(RGB)-FB-3V NNP (optional)
D3 = LED, blue, 0603
Q1,Q2,Q4,Q5,Q6 = DMG1012UW
Q3 = PT91-21B/TR7
J6 = Edge connector socket, 2x40, 0.05” pitch
J7 = 25-pin pin header, 0.1” pitch
J3,J4 = 2-pin pin header, 0.1” pitch
J5,J8 = 3-pin pin header, 0.1” pitch
J2 = USB micro B connector
BZ1 = Piezo buzzer
S1,S2,S3,S4 = Tactile switch, 6x6mm
PCB 160274-1 rev3.2
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