# Round Black Hoverboard ## Description Ultra-Low Power 10-LED Coin-Cell Roulette Chaser with Sound ## Project Details - **Owner:** mridhul - **Created:** 10/16/2025 - **Last Updated:** 10/16/2025 - **Visibility:** Public - **Power Requirements:** Battery - **Human Interface:** Buttons - **Operating Voltage:** 3V - **Human Interface:** Display - **System Architecture:** flowchart TD Vin[Coin Cell] --> Timer555[555 Timer] Vin --> Counter4017[CD4017 Decade Counter] StartButton[Start Button] --> Counter4017Reset[Reset/Enable Pin] Timer555 -->|CLK| Counter4017 Counter4017 --> LEDs[10 LEDs Array] Counter4017 -->|Enable Buzzer| Transistor[NPN Transistor] --> Buzzer[Buzzer] ## Key Components ### BT1 — [BAT-HLD-001-THM](https://www.flux.ai/adrian95/bat-hld-001-thm~aun.md) - Role Details: Coin-cell holder for CR2032 battery - Role: Power Source - Part Type: Battery Holder - Package or Case Code: BAT-HLD-001-THM - Manufacturer Part Number: BAT-HLD-001-THM - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.te.com/usa-en/product-BAT-HLD-001-THM.datasheet.pdf - Manufacturer Name: Linx Technologies Inc. **Pins:** - N [pin N] - P1 [pin P1] - P2 [pin P2] - P3 [pin P3] - P4 [pin P4] ### J1 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Manufacturer Name: TE Connectivity AMP Connectors - Package or Case Code: TE_282837-2 - Role Details: External buzzer connection - Part Type: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Manufacturer Part Number: 282837-2 - Role: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### LED1 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: LED indicator for chaser sequence - Role: Indicator - Package or Case Code: LED_0805_2012Metric - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED10 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: LED indicator for chaser sequence - Package or Case Code: LED_0805_2012Metric - Part Type: LED - Role: Indicator **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role: Indicator - Role Details: LED indicator for chaser sequence - Package or Case Code: LED_0805_2012Metric - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED3 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Part Type: LED - Role: Indicator - Package or Case Code: LED_0805_2012Metric - Role Details: LED indicator for chaser sequence **Pins:** - A [pin 2] - K [pin 1] ### LED4 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Package or Case Code: LED_0805_2012Metric - Role Details: LED indicator for chaser sequence - Part Type: LED - Role: Indicator **Pins:** - A [pin 2] - K [pin 1] ### LED5 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Part Type: LED - Role Details: LED indicator for chaser sequence - Package or Case Code: LED_0805_2012Metric - Role: Indicator **Pins:** - A [pin 2] - K [pin 1] ### LED6 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Part Type: LED - Role: Indicator - Role Details: LED indicator for chaser sequence - Package or Case Code: LED_0805_2012Metric **Pins:** - A [pin 2] - K [pin 1] ### LED7 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: LED indicator for chaser sequence - Role: Indicator - Package or Case Code: LED_0805_2012Metric - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED8 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: LED indicator for chaser sequence - Role: Indicator - Package or Case Code: LED_0805_2012Metric - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED9 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role: Indicator - Part Type: LED - Package or Case Code: LED_0805_2012Metric - Role Details: LED indicator for chaser sequence **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [SMMBT3904LT1G](https://www.flux.ai/adrian95/smmbt3904lt1g~yxq.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: SOT-23 - Part Type: Transistor - Role: Switching - Role Details: NPN transistor driver for buzzer - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt3904lt1-d.pdf - Manufacturer Part Number: SMMBT3904LT1G - Breakdown Voltage: 40V **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### SW1 — [KSC341GLFS](https://www.flux.ai/adrian95/ksc341glfs~fb0.md) - Role Details: Start push button for sequence - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: KSC341GLFS - Datasheet URL: https://www.ckswitches.com/media/1969/ksc3.pdf - Manufacturer Part Number: KSC341GLFS - Part Type: Switch - Manufacturer Name: C&K - Role: Switch **Pins:** - COM_1 [pin 1] - COM_2 [pin 2] - NO_1 [pin 3] - NO_2 [pin 4] ### U1 — [LMC555N](https://www.flux.ai/lcsc/lmc555n~41hv.md) - Role: Integrated Circuit - Operating Voltage: 3V - Product Info Url: https://lcsc.com/product-detail/Clock-Timing-Application-Specific_HGSEMI-LMC555N_C725328.html - Role Details: Astable timer for clock generation - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2008221534_HGSEMI-LMC555N_C725328.pdf - Voltage Rating: 5V - LCSC Part Number: C725328 - Manufacturer Part Number: LMC555N - JLCPCB Part Class: Extended Part - Part Type: Clock/Timing-Application Specific - Manufacturer Name: HGSEMI(华冠) - Package or Case Code: DIP-8_L9.7-W6.4-P2.54-LS7.6-BL **Pins:** - ~{RESET} [pin 4] - ~{TRIGGER} [pin 2] - CTL_VOL [pin 5] - DISCHARGE [pin 7] - GND [pin 1] - OUTPUT [pin 3] - THRESHOLD [pin 6] - VCC [pin 8] ### U2 — [CD4017BPWR](https://www.flux.ai/jecstronic/cd4017bpwr~ep.md) - Manufacturer Part Number: CD4017BPWR - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/cd4017b.pdf - Voltage Rating: 5V - Package or Case Code: SOP65P640X120-16N - Role Details: Decade counter for LED sequence - Operating Voltage: 3V - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Role: Integrated Circuit **Pins:** - *0 [pin 3] - *1 [pin 2] - *2 [pin 4] - *3 [pin 7] - *4 [pin 10] - *5 [pin 1] - *6 [pin 5] - *7 [pin 6] - *8 [pin 9] - *9 [pin 11] - CARRY_OUT [pin 12] - CLOCK [pin 14] - CLOCK_INHIBIT [pin 13] - RESET [pin 15] - VDD [pin 16] - VSS [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/mridhul/round-black-hoverboard~lq](https://www.flux.ai/mridhul/round-black-hoverboard~lq).* --- *Generated from [https://www.flux.ai/mridhul/round-black-hoverboard~lq](https://www.flux.ai/mridhul/round-black-hoverboard~lq)*