# Conservation Gold Scramble Suit ## Description Bee Venom Collector - USB-C charged Li-ion + 24V boost + ATtiny85 control ## Project Details - **Owner:** poseidon3191 - **Created:** 2/16/2026 - **Last Updated:** 2/16/2026 - **Visibility:** Public - **Placement Notes:** - Provide thermal copper area under Q1 (TIP122). - Keep MT3608 switching loop tight: U2 SW <-> L1 <-> output cap C3 and VIN cap C2 close to U2. - Place J4 near the board edge for access. - **Layout Rules - Power nets:** Power net class intent: 25 mil minimum trace width for USB_5V and VBOOST_24V, and battery net (currently named "Net 1"; rename to BATT if desired). - **System Architecture:** ```mermaid flowchart TD USB_C["USB-C 5V Input"] CHG["TP4056 Li-ion Charger"] BAT["1S Li-ion Cell"] BOOST["MT3608 Boost 24V"] MCU["ATtiny85 MCU"] SW["TIP122 Low-side Switch"] GRID["Bee Grid Output"] USB_C --> CHG CHG --> BAT BAT --> BOOST BAT --> MCU MCU --> SW BOOST --> GRID SW --> GRID ``` - **Copper Pour - GND:** Intent: add GND pours on both top and bottom layers with 12 mil clearance, plus stitching vias where applicable. - **Layout Rules - Signal nets:** Signal net class intent: 10 mil trace width and 8 mil clearance for all other nets. ## Key Components ### J1 — [USB-C 2.0 Receptacle](https://www.flux.ai/corynrobinson/usb-c-20-receptacle.md) - Manufacturer Part Number: USB4105-GF-A - Part Type: USB C - Purchase Url: https://www.digikey.com/en/products/detail/gct/USB4105-GF-A/11198441 - Manufacturer Name: GTC - Role Details: USB-C power input (VBUS + GND). - Package: USB-C receptacle - Datasheet URL: https://gct.co/files/drawings/usb4105.pdf - Role: Connector **Pins:** - CC1 [pin 6] - CC2 [pin 12] - D- [pin 7] - D- [pin 9] - D+ [pin 10] - D+ [pin 8] - GND [pin 1] - GND [pin 16] - GND [pin 15] - GND [pin 2] - SBU1 [pin 11] - SBU2 [pin 5] - VBUS [pin 3] - VBUS [pin 14] - VBUS [pin 4] - VBUS [pin 13] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Role: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Package: THT 2.00mm - Manufacturer Name: JST Sales America - Role Details: JST-PH 2-pin battery connector. - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J3 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal.md) - Part Type: Connector - Role: Connector - Manufacturer Part Number: 691137710002 - Manufacturer Name: Würth Elektrik - Package: THT screw terminal - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Role Details: 2-pin screw terminal for bee grid +24V and switched return. **Pins:** - P1 [pin 1] - P2 [pin 2] ### J4 — [AVR-ISP-6](https://www.flux.ai/vasy_skral/avr-isp-6.md) - Part Type: Connector - Role Details: AVR ISP 6-pin (MISO/MOSI/SCK/RESET/VCC/GND). - Role: Programming header - Datasheet URL: https://www.we-online.com/catalog/datasheet/61200621621.pdf - Manufacturer Part Number: 61200621621 - Package: 2x3 2.54mm - Manufacturer Name: Würth Elektronik - Exclude from BOM: false **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### Q1 — [TIP122](https://www.flux.ai/lcsc/tip122.md) - Part Type: Darlington Transistors - LCSC Part Number: C358524 - Transistor Type: NPN - Package: TO-220-3_L10.0-W4.5-P2.54-L - Collector Current: 5A - JLCPCB Part Class: Extended Part - Role: Low-side switch - Manufacturer Name: BLUE ROCKET(蓝箭) - Product Info Url: https://lcsc.com/product-detail/Others_Foshan-Blue-Rocket-Elec-TIP122_C358524.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Foshan-Blue-Rocket-Elec-TIP122_C358524.pdf - Role Details: TIP122 Darlington NPN low-side switch for bee grid return. - Manufacturer Part Number: TIP122 - Collector-emitter voltage: 100V - DC current gain: 1000@3V,3A - Package or Case Code: TO-220-3_L10.0-W4.5-P2.54-L - Power: 2W **Pins:** - B [pin 1] - C [pin 2] - E [pin 3] ### U1 — [TP4056](https://www.flux.ai/lcsc/tp4056.md) - Role Details: USB 5V to 1S Li-ion charger (TP4056). - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - JLCPCB Part Class: Extended Part - Role: Charger - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409241408_UMW-Youtai-Semiconductor-Co---Ltd--TP4056_C725790.pdf - Manufacturer Name: UMW(友台半导体) - Manufacturer Part Number: TP4056 - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_UMW-Youtai-Semiconductor-Co-Ltd-TP4056_C725790.html - LCSC Part Number: C725790 - Part Type: Battery Management ICs - Package: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP **Pins:** - ~{CHRG} [pin 7] - ~{STDBY} [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U2 — [MT3608L](https://www.flux.ai/lcsc/mt3608l.md) - Role: Boost Converter - Role Details: Boost converter set to 24V output (MT3608 family). - IC Type: DC-DC Boost Converter - Logic Function: Voltage Boosting - Operating Voltage: Input: 2V to 24V Output: Adjustable, 5V to 28V - JLCPCB Part Class: Extended Part - Frequency: 1.2 MHz - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL_3 - Part Type: DC-DC Converters - Manufacturer Part Number: MT3608L - LCSC Part Number: C2932326 - Power Consumtion: 1.2 mA (load-dependent) - Package: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL_3 - Manufacturer Name: 西安航天民芯 **Pins:** - EN [pin 4] - FB [pin 3] - GND [pin 2] - OC [pin 6] - SW [pin 1] - VIN [pin 5] ### U3 — [ATTINY85-20SU](https://www.flux.ai/adrian95/attiny85-20su.md) - Part Type: Microcontroller - License: https://creativecommons.org/licenses/by/4.0/ - Role: MCU - Manufacturer Part Number: ATTINY85-20SU - Power Requirements: BATT (1S Li-ion) - Manufacturer Name: Microchip - Package: 8-SOIC - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet-Summary.pdf - Role Details: ATtiny85 MCU; firmware generates 128 Hz 30% PWM with 15 min auto-off. **Pins:** - ~RESET~/PB5 [pin 1] - AREF/PB0 [pin 5] - GND [pin 4] - PB1 [pin 6] - PB2 [pin 7] - VCC [pin 8] - XTAL1/PB3 [pin 2] - XTAL2/PB4 [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/poseidon3191/conservation-gold-scramble-suit](https://www.flux.ai/poseidon3191/conservation-gold-scramble-suit).* --- *Generated from [https://www.flux.ai/poseidon3191/conservation-gold-scramble-suit](https://www.flux.ai/poseidon3191/conservation-gold-scramble-suit)*