# Monthly Copper Gadget Copter ## Description 110VAC 1.5A Fan Dimmer with Opto-Isolated TRIAC and Full Protection ## Project Details - **Owner:** carlos110w - **Created:** 11/21/2025 - **Last Updated:** 11/22/2025 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart LR subgraph AC_Mains_Section["AC Mains Section"] L((L)) --> Fuse[Fuse (1.5A slow-blow)] N((N)) --> TriacMT1[TRIAC MT1] Fuse --> TriacMT2[TRIAC MT2] L --> MOV[MOV (275 VAC)] end TriacMT1 & TriacMT2 --> Load[Fan Load] subgraph Protection_Network["Protection Network"] Fuse MOV Snubber[RC Snubber] end Snubber --> TriacMT1 Snubber --> TriacMT2 subgraph TRIAC_Switching_Stage["TRIAC Switching Stage"] TriacMT1 & TriacMT2 & Gate[TRIAC Gate] end subgraph Control_Path["Control Path"] Pot[Potentiometer (10kΩ)] --> Opto[Optotriac (non-zero-cross)] Opto --> Gate end ``` ## Key Components ### D1 — [Diode_THT_P10.16mm_Horizontal](https://www.flux.ai/jecstronic/diodethtp1016mmhorizontal.md) - Part Type: Diode **Pins:** - A - K ### D2 — [Diode_THT_P10.16mm_Horizontal](https://www.flux.ai/jecstronic/diodethtp1016mmhorizontal.md) - Part Type: Diode **Pins:** - A - K ### D4 — [DB3](https://www.flux.ai/kicad-part-library/db3.md) - Datasheet URL: http://cdn-reichelt.de/documents/datenblatt/A100/DB%203%23st.pdf - Package or Case Code: D_DO-35_SOD27_P7.62mm_Horizontal - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: DB3 - Part Type: Diode THT **Pins:** - A [pin 2] - K [pin 1] ### J1 — [Terminal Block, 4-Contact, 5.08mm Pitch, Through Hole Mount, 1-Row, Screw Termination](https://www.flux.ai/mrcyme/terminal-blockc-4-contactc-5p08mm-pitchc-through-hole-mountc-1-rowc-screw-termination.md) - Part Type: Connector - Manufacturer Name: DORABO - Manufacturer Part Number: DB2ERC-3.5-9P-GN - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2303271530_DORABO-DB2ERC-3-5-9P-GN_C430560.pdf **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### Q2 — [BT136-600E,127](https://www.flux.ai/adrian95/bt136-600ec127.md) - Part Type: Thyristors - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BT136-600E,127 - Manufacturer Name: WeEn Semiconductors - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NXP%20PDFs/BT136-600E.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/carlos110w/monthly-copper-gadget-copter](https://www.flux.ai/carlos110w/monthly-copper-gadget-copter).* --- *Generated from [https://www.flux.ai/carlos110w/monthly-copper-gadget-copter](https://www.flux.ai/carlos110w/monthly-copper-gadget-copter)*