
Ultra DB X51 v1
ExploreEmbedded/8051_DevelopmentBoard
Design files and sample code for 8051 development Ultra Boards

Driver for a Raspberry Pi-based Deployment Trigger Button
Releasebuttonboard is an open-source printed circuit board by apparentlymart, from the apparentlymart/release-button repository on GitHub. It is a 4-layer board of 99.5 × 56 mm with 34 parts on 36 nets, routed with 249 tracks and 3 vias.
It is built around the PAM8407DR and 24C16. Its parts include 7 capacitors, 7 ICs, 4 resistors and 1 switch.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | VAL** | Local:Mounting_Hole_2.75mm | Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm, Mounting_Hole_2.75mm |
| 4 | 0.1uF | Discret:C1 | C2, C3, C4, C5 |
| 4 | FILTER | Discret:R4 | FB1, FB2, FB3, FB4 |
| 2 | 1uF | Discret:C2 | C6, C7 |
| 2 | 3.9K | Discret:R3 | R2, R3 |
| 2 | REncHeader | Pin_Headers:Pin_Header_Straight_1x05 | U4, U7 |
| 2 | SPEAKER | Local:Terminal_Block_2x3.5mm | SP1, SP2 |
| 1 | 100nF | Discret:C1 | C1 |
| 1 | 10K | Discret:R3 | R4 |
| 1 | 1K | Discret:R3 | R1 |
| 1 | 24C16 | SOIC_Packages:SOIC-8_3.9x4.9mm_Pitch1.27mm | U1 |
| 1 | BtnHeader | Pin_Headers:Pin_Header_Straight_1x04 | U5 |
| 1 | JUMPER | Pin_Headers:Pin_Header_Straight_1x02 | JP1 |
| 1 | OLEDHeader | Pin_Headers:Pin_Header_Straight_1x08 | U3 |
| 1 | PAM8407 | SOIC_Packages:SOIC-16_3.9x9.9mm_Pitch1.27mm | U6 |
| 1 | RASPIPLUSHEADER | Pin_Headers:Pin_Header_Straight_2x20 | U2 |
| 1 | ROTENC | Local:PEC11 | SW1 |
It measures 99.5 × 56 mm and has 4 copper layers, 1.6 mm thick.
34 parts, built around the PAM8407DR and 24C16. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the apparentlymart/release-button repository on GitHub, at the commit this page was made from: the board is pcb/releasebuttonboard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask apparentlymart before reusing the design.

ExploreEmbedded/8051_DevelopmentBoard
Design files and sample code for 8051 development Ultra Boards

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