2 layers163.6 × 33.2 mm
CompactBeamspringP2
purdeaandrei/CompactBeamSpring
Compact Beamspring Controller, based on the TH Xwhatsit design
68 parts8
2 layers163.6 × 18.8 mm
CompactBeamspring
purdeaandrei/CompactBeamSpring8Compact Beamspring Controller, based on the TH Xwhatsit design
- Size
- 163.6 × 18.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 61
- Pads
- 179
- Tracks, vias
- 579, 131
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 Sep 2020
- Updated
- 15 Sep 2022
Overview
CompactBeamspring is an open-source printed circuit board by purdeaandrei, from the purdeaandrei/CompactBeamSpring repository on GitHub. It is a 2-layer board of 163.6 × 18.8 mm with 34 parts on 61 nets, routed with 579 tracks and 131 vias.
It is built around the MCP4921-E/P, 74AHC595D and LM339AD. Its parts include 12 resistors, 6 capacitors, 6 ICs and 3 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
MCP4921-E/P
PDIP-8-40℃~+125℃ 1 12 12LSB 2.7V~5.5V 4.5us Integrated buffer、Power-on reset、Power-down mode、Programmable gain SPI Voltage Buffer PDIP-8 Digital to Analog Converters (DAC) ROHSMicrochip TechnologyDigital To Analog Converters (DAC)
74AHC595D
SOIC-16-40℃~+125℃ 1 170MHz 2V~5.5V 74AHC 8 8mA Serial-to-Serial or Parallel Tri-State SOIC-16 Shift Registers ROHSNexperiaShift Registers
LM339AD
SOIC-14-18V~-1V、1V~18V -40℃~+125℃ 1.3us 1.3us 25nA 2V~36V 2mV 36V 3nA 800uA Four channels Open Collector Rail-to-rail input TTL、CMOS SOIC-14 Comparators ROHSTexas InstrumentsComparators
README
README.mdCompact Beamspring controller.
This controller only supports new style card edge connectors only, and it requires the side of the card edge connector to be cut off, and the pins be bent 90 degress.
Images
Other controllers in this family:
- https://github.com/purdeaandrei/CompactBeamSpringAdditionalExpansion
- https://github.com/purdeaandrei/SMDModelFController
- https://github.com/purdeaandrei/SMDModelFController/tree/extra_columns
- https://github.com/purdeaandrei/SMD4704KishsaverClassModelFController
- https://github.com/listofoptions/TH-XWhatsIt
Origins and license
This project is based on the Through-hole xwhatsit by listofoptions, which is un turn based on the capsense controllers by XWhatsIt (Tom Wong-Cornall). original liscencure holds, as well as CERN OSH (compatible license).
original implementation of Tom Wong-Cornall's controller documented here
http://downloads.cornall.co/ibm-capsense-usb-web/ibm-capsense-usb.html
Working theory of operation is under the previous link.
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0U1 | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3, C4, C5, C6 |
| 4 | 100k 1% | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R9, R10, R11, R12 |
| 3 | 74AHC595 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3, U4, U7 |
| 3 | Not Mounted | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R6, R7, R8 |
| 2 | 20K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R4 |
| 2 | 4K7 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R5 |
| 2 | Net-Tie_3 | NetTie:NetTie-3_THT_Pad0.3mm | NT1, NT2 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 1 | BEAMSPRING CONNECTOR | TH-XWhatsIt:30-pin-universal-beamspring-connector_v3_onlyflat | J1 |
| 1 | Dac Output | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | EXPANSION HEADER | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | LM339A | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | MCP4921-E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | MountingHole_Pad | TH-XWhatsIt:ChassisGnd | H1 |
| 1 | PadsToShort | TH-XWhatsIt:PadsToShort | J2 |
| 1 | ProMicro | promicro:ProMicro | U5 |
| 1 | Threshold Voltage | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
The 32 most common of 34 parts.
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Questions
How big is the CompactBeamspring PCB?
It measures 163.6 × 18.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CompactBeamspring use?
34 parts, built around the MCP4921-E/P, 74AHC595D and LM339AD. 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.
Where can I download the CompactBeamspring KiCad files?
From the purdeaandrei/CompactBeamSpring repository on GitHub, at the commit this page was made from: the board is CompactBeamspring/CompactBeamspring.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the CompactBeamspring design in my own project?
Its repository states no licence, so its author keeps all rights: ask purdeaandrei before reusing the design.