BOMwiki the bill-of-materials encyclopedia
30,454,201 parts mapped · 193,225 items
Discussion History

Alarm Mechanism

Assembly

The wake-up works: a 12-hour cam closes a contact at the set time, powering a small motor whose eccentric swings a hammer between two bells. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Alarm Mechanism parts and their functions

7 top-level parts · 8 parts in total · full bill of materials below
Alarm Mechanism parts diagram: 1 alarm cam, 2 trip contact, 3 alarm motor, 4 eccentric pin, 5 hammer arm, 6 bell dome, 7 piezo buzzer. 8 parts in 7 top-level items.
Alarm Mechanism parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Alarm Cam 1× Set-time cam disc
2 Trip Contact 1× Cam-follower switch
3 Alarm Motor 1× Hammer drive motor
4 Eccentric Pin 1× Crank pin
5 Hammer Arm 1× Bell striker
6 Bell Dome 2× Twin bells
7 Piezo Buzzer 1× Backup piezo sounder

3D model

No 3D model yet. Have a CAD file of this? Add a 3D model. STL renders right on this page; STEP, FreeCAD, and OpenSCAD sources are welcome too (openly licensed, like all 3D models on BOMwiki).

Build & assembly graph

expand / collapse · shared sub-assemblies converge · links to related products · est. labour
product / assembly shared across products atomic part related product

Tap an assembly to expand/collapse · tap a part to open it · use “Open page” for any node · drag to pan, scroll to zoom.

Bill of materials for Alarm Mechanism

7 top-level lines · 7 rows shown · 8 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Alarm Cam alarm-clock-alarm-cam 1× 1 · part
2 Trip Contact alarm-clock-trip-contact 1× 1 · part
3 Alarm Motor alarm-clock-alarm-motor 1× 1 · part
4 Eccentric Pin alarm-clock-eccentric 1× 1 · part
5 Hammer Arm alarm-clock-hammer-arm 1× 1 · part
6 Bell Dome alarm-clock-bell-dome 2× 2 · part
7 Piezo Buzzer alarm-clock-buzzer 1× 1 · part

Something wrong in this list? Report a problem with this BOM.

Where the alarm mechanism is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗
Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
flex.com ↗ Singapore Electronics contract mfg 1,000 pcs 6–10 wks
dixoninfo.com ↗ Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
bydelectronic.com ↗ Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗
Singapore Electronics contract mfg 1,000 pcs 6–10 wks