Learning and fast prototyping
hand-turned 24-detent knob with a push switch — the standard menu / setpoint / volume input for a robot control panel; 60 RPM max, so not a motor-shaft encoder.
Engineering inference
Bourns
Bourns PEC11 Rotary Encoder + Knob Kit
Bourns PEC11-4215F-S24 12 mm mechanical rotary encoder with push switch (Adafruit 377, knob included): 24 detents / 24 pulses per turn, 2-bit quadrature A/B + common, momentary SPST push switch, 6 mm flatted metal shaft 15 mm long, M7 bushing panel mount, 1 mA @ 5 V contacts, 60 RPM max, −30 to +70 °C, 30 000-cycle life, 5 g. The classic menu / volume knob for robot UIs.
PEC11-4215F-S24Development boardPrice$4.50www.adafruit.com · in stock
Buy at www.adafruit.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
No-load speed, rated performance and stall limits describe different operating points. A stall specification is not a continuous operating rating.
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 13.2 × 12.5 × 21.5 mm
- Verification
- generated
- Envelope complete
- Yes
Signals & mounting
Signals and mounting
Resolution, output stage and the pads you wire — what the controller needs to count it.
- Sensing
- mechanical
- Type
- incremental
- Channels
- A/B quadrature
- Output
- mechanical contacts to common — add pull-ups
- Supply voltage
- 5–5 V
- Mounting
- panel mount: M7×0.75 threaded bushing with washer and nut, plus two PCB tabs
| Pad / pin | Position | Role | Notes |
|---|---|---|---|
| A | signal a | channel A contact to common (quadrature, mechanical) | |
| C | ground | common — usually tied to ground, A/B pulled up | |
| B | signal b | channel B contact to common (quadrature, mechanical) | |
| SW1 | other | push switch contact (momentary SPST, normally open) | |
| SW2 | other | push switch contact (momentary SPST, normally open) |
CPR counts both edges of both channels on the sensed shaft; on a gearmotor multiply by the gear ratio for the output shaft.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
Stall torque and current are not continuous ratings. Check the duty cycle and starting load when choosing the driver and power supply.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Motor body
- Product operating range
- -30 to 70 °C
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 13.2 mm
- Width
- 12.5 mm
- Reported height / thickness
- 21.5 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Board connectors
| ID / type | Pins | Pitch | Notes |
|---|---|---|---|
| enc3 PC pins (A, C, B), 2.5 mm pitch | 3 | 2.5 mm | — |
| sw2 PC pins for the push switch | 2 | Unknown | — |
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
www.adafruit.com
US · USD
$4.50Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 1, 2026, 07:46 AM UTC
- Delivery estimate
- Not quoted
Observed within the last 24 hours. Confirm the current supplier quote.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
Bourns PEC11 rotary encoder with the included knob (Adafruit 377) (opens in a new tab)
Unverified reference
inspected: 12 mm metal-frame encoder, 3 PC pins (A C B), black soft-touch knob with white pointer
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.constraints.electrical.supply_voltage_max_v, spec.constraints.electrical.supply_voltage_min_v, spec.constraints.thermal.operating_temp_max_c, spec.constraints.thermal.operating_temp_min_c, spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.height_mm, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.geometry.other.weight_g, spec.provides.channels, spec.provides.encoder_type, spec.provides.features, spec.provides.index_channel, spec.provides.interface, spec.provides.max_speed_rpm, spec.provides.mounting, spec.provides.output_type, spec.provides.resolution_ppr, spec.provides.sensing, spec.provides.shaft_diameter_mm, spec.usage.connectors, spec.usage.pinout, spec.usage.pinout_complete
sha256 1e4470f3c4cbbd0a497cc499c8e45922c2035005cbbe2b7d0c6171228ea4de00
Supports: offers
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FAQ
Bourns PEC11 Rotary Encoder + Knob Kit questions
What voltage powers the Bourns PEC11 Rotary Encoder + Knob Kit?
Supply range 5–5 V.
How much does the Bourns PEC11 Rotary Encoder + Knob Kit cost?
From $4.5 at www.adafruit.com. Prices are observed unit prices before tax and shipping.
What are the Bourns PEC11 Rotary Encoder + Knob Kit dimensions?
13.2 × 12.5 × 21.5 mm. A STEP model is available for enclosure fit checks.
Where does this Bourns PEC11 Rotary Encoder + Knob Kit data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.