Push Button

The PomeLabs Push Button Module (PML-PB-01) puts a single, deliberate, physical action at the center of your circuit. Press it and a clean momentary signal appears — IP67-sealed against dust and water, rated for $60,000$ cycles, with two UART ports so the rest of your kit stays connected while you interact.

Revision: v1.0 | Part Number: PML-PB-01 | Series: PomeLabs Core Kit

Schematic

Digital Twin

In the PomeLabs App, the PML-PB-01 is mirrored as a digital twin in both the Playground and inside any Connect Activity. On connection the module reports its unique ID, firmware version, and type, and the App places it in your circuit by reading the live netlist — so you always see which module it is and how it is wired. The button is a passive momentary contact: the App knows the module is present and where it sits, but the current release neither simulates a press nor streams the live contact state.

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Datasheet

1. Overview

The PML-PB-01 centers on the TS05-66-50-BK-260-SMT-67 (Same Sky / CUI Devices) — a $6 \times 6\,\mathrm{mm}$ surface-mount tactile switch rated for $60,000$ mechanical cycles. It is SPST normally-open (NO) and momentary: terminals S1_A and S1_B are electrically open at rest and make contact only while the button is held down, returning to open on release.

The IP67 rating distinguishes this switch from standard tactile components — it is dust-tight and protected against temporary immersion, making it suitable for lab environments where liquid spills or particulate contamination are a real risk. The $260\,\mathrm{gf}$ ( $2.6\,\mathrm{N}$ ) operating force provides firm, unambiguous tactile feedback that eliminates accidental actuation during circuit handling.

2. BOM Components

Ref.	Type	Value / Part	Role on this module
S1	Tactile switch	TS05-66-50-BK-260-SMT-67 (Same Sky)	SPST normally-open momentary push button. IP67 rated. Black actuator, $5\,\mathrm{mm}$ height, $260\,\mathrm{gf}$ ( $2.6\,\mathrm{N}$ ) operating force, $6 \times 6\,\mathrm{mm}$ SMT body. S1_A and S1_B open at rest; contact made only while button is held. $60,000$ cycle mechanical life. Brass terminals (silver-plated); SUS contacts (silver-plated).
R1, R2	Resistor	$4.7\,\mathrm{k\Omega}$	Pull-up resistors on UART TX/RX lines to $3.3\,\mathrm{V}$ .
p1, p2	Connector	Node headers	Left and Right node connectors exposing $+5\,\mathrm{V}$ , GND, S+, S−, RX/TX, TX/RX to downstream modules.

Parameter	Symbol	Value	Unit
Voltage Rating (across open contacts)	$V_{max}$	$12$	VDC
Current Rating (through closed contacts)	$I_{max}$	$50$	mA
Operating Temperature	$T_{op}$	$-30$ to $+80$	°C
Storage Temperature	$T_{stg}$	$-40$ to $+100$	°C
Mechanical Life (cycles)	$N_{mech}$	$60,000$	—
Electrical Life (cycles)	$N_{elec}$	$60,000$	—

3.1.2 Recommended Operating Conditions

Recommended conditions for reliable operation.

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	$V_{CC}$	$1$	—	$12$	VDC
Operating Current	$I_{op}$	$0.01$	—	$50$	mA
Operating Force	$F_{op}$	—	$260$ ( $2.6\,\mathrm{N}$ )	—	gf
Switch Travel (Actuator stroke)	$D_{travel}$	—	$0.25$	—	mm
Contact Resistance	$R_{cont}$	—	—	$100$	m $\Omega$
Insulation Resistance ( $500\,\mathrm{VDC}$ )	$R_{ins}$	$100$	—	—	M $\Omega$
Dielectric Strength ( $1$ minute)	$V_{diel}$	—	$250$	—	VAC
Bounce Time (typical)	$T_{bnce}$	—	$5$	—	ms

4. Pin Descriptions

All signal pins are referenced to GND.

Pin / Net Name	Direction	Description
S1_A	Passive	Terminal A of switch S1. One side of the SPST momentary contact. Connect to signal source or pull-up/pull-down circuit.
S1_B	Passive	Terminal B of switch S1. Connected to the opposing rail (GND or signal destination). Electrically connected to S1_A only when button is pressed.
TX_L-1 / TX_L-2	Input	UART transmit from Backend MCU (USART1/USART3) to Left and Right node connectors.
RX_L-1 / RX_L-2	Output	UART receive from Left and Right node connectors back to Backend MCU.
TX_P-1 / TX_P-2	Output	Transmit lines to node-side connectors.
RX_P-1 / RX_P-2	Input	Receive lines from node connectors.
5VBus	Power In	$5\,\mathrm{V}$ supply rail.
3V3	Power In	$3.3\,\mathrm{V}$ logic rail for pull-up resistors R1–R2 ( $4.7\,\mathrm{k\Omega}$ ).
GND	Ground	Common ground reference for all components and connectors.

5. Connection Guide & Common Errors

Correct wiring and power-up sequence:

Connect GND first, shared across all modules on the common bus.
Connect 5VBus to a regulated $5\,\mathrm{V}$ source.
Connect 3V3 for UART pull-up resistors R1 and R2.
Connect S1_A to signal source (e.g. $3.3\,\mathrm{V}$ via pull-up to VCC). Connect S1_B to GND for active-low configuration.
Configure Backend MCU GPIO as input with pull-up/pull-down to avoid floating input.
Do not exceed $12\,\mathrm{Vdc}$ or $50\,\mathrm{mA}$ through the switch contacts.

Common wiring errors and consequences:

Mistake	Symptom	Correction
Voltage on S1 terminals exceeds $12\,\mathrm{Vdc}$	Contact degradation or arcing; switch permanently damaged	Keep switched voltage $\leq 12\,\mathrm{Vdc}$ .
Current through S1 exceeds $50\,\mathrm{mA}$	Contact welding or burning; switch fails open or stuck closed	Keep switched current $\leq 50\,\mathrm{mA}$ . Add series resistor if load current may exceed this.
Switch input node left floating (no pull-up or pull-down)	Floating CMOS input on Backend MCU — undefined logic level	Always connect a pull-up or pull-down resistor on the GPIO reading S1. Typical $10\,\mathrm{k\Omega}$ .
More than $2$ reflow cycles applied to S1	Switch housing or waterproof seal may be damaged; IP67 rating voided	Limit reflow soldering to a maximum of $2$ cycles per TS05 assembly specification.

Schematic

Digital Twin

Datasheet

1. Overview

2. BOM Components

3. Electrical Specifications

3.1 TS05-66-50-BK-260-SMT-67

3.1.1 Absolute Maximum Ratings

3.1.2 Recommended Operating Conditions

4. Pin Descriptions

5. Connection Guide & Common Errors

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