mirror of
https://github.com/ravinrabbid/DonCon2040.git
synced 2024-11-20 11:47:07 +01:00
48 lines
7.5 KiB
Markdown
48 lines
7.5 KiB
Markdown
# DonConIO - Signal Conditioning for the DonCon2040
|
|
|
|
This board hosts a Seeed Studio XIAO RP2040 microcontroller unit and provides signal conditioning for the piezo drum triggers. The conditioning circuit is reverse engineered from the *V260 SIF PCB* found in the original arcades. This is also the main reason why this board uses mainly through hole parts ... for *authenticity*.
|
|
|
|
|
|
|
|
## Sensors
|
|
|
|
The arcade drum uses *Sensatec GSS-4SD* piezo impact sensors. While those are only available as expensive arcade spare parts, the *GSS-4SA* and *GSS-4SC* variants used in this build can be readily ordered directly from the manufacturer. My guess here is that the *D* variant only uses a different cable and connector, but who knows ...
|
|
|
|
You can also try your luck with any generic piezo, in this case you might have to tune the filters and amplification factor.
|
|
|
|
## Note
|
|
|
|
This board does not use the internal ADCs of the RP2040 since those are pretty noisy and have a static offset of around +25mV. You can however still skip the external ADC and level-shifter and connect the signals directly to ADC pins of the XIAO RP2040 if you want to save some cost.
|
|
|
|
## Bill of Materials
|
|
|
|
| **Reference** | **Description** | **Digikey Part** | **Notes** |
|
|
| ----------------------------------------------------- | :--------------------------------------------------: | :-----------------------: | :---------------------------------------------------------------------------------------: |
|
|
| J6, J7 | Seeed Studio XIAO RP2040 | - | |
|
|
| U1, U2, U3, U4 | TL072CP JFET OpAmp | 296-1775-5-ND | |
|
|
| U5 | MCP3204 12bit SPI ADC | MCP3204-CI/SL-ND | |
|
|
| U6 | MCP1541 4.09V Voltage Reference | MCP1541T-I/TTCT-ND | |
|
|
| U7 | TXB0104 4-Bit Bidirectional Voltage-Level Translator | 296-21928-1-ND | |
|
|
| PS1 | +/-12V DC to DC Converter | 2725-A0512S-1WR3-ND | |
|
|
| C1, C3, C5, C7 | 1nF Mylar/Polyester Capacitor | 493-14299-ND | |
|
|
| C2, C4, C6, C8 | 0.47µF Tantalum Capacitor | 478-1901-ND | |
|
|
| C9-C16 | 100nF Ceramic Capacitor | BC1084CT-ND | |
|
|
| C17 | 4.7µF Electrolytic Capacitor | 1189-1421-ND | |
|
|
| C18, C19 | 1µF Electrolytic Capacitor | 50YXJ4.7M5X11-ND | |
|
|
| C20, C22, C24, C25 | 0.1µF SMD Ceramic Capacitor | 1276-1003-1-ND | |
|
|
| C21, C23, C26 | 10µF SMD Ceramic Capacitor | 1276-6454-1-ND | |
|
|
| D1, D2, D5, D7, D8, D11, D13, D14, D17, D19, D20, D23 | 1SS133M Small Signal Diode | 1SS133MR0GCT-ND | While the 1SS133M is probably more *authentic*, a 1N4148 will probably just work as well. |
|
|
| D3, D4, D9, D10, D15, D16, D21, D22 | BAT43 Schottky Diode | 112-BAT43-TAPCT-ND | |
|
|
| D6, D12, D18, D24 | 1N5229B 4.3V 500mW Zener Diode | 1N5229BFSCT-ND | |
|
|
| R1, R10, R19, R28 | 1MΩ Resistor | 13-MFR-25FTE52-1MCT-ND | |
|
|
| R2, R11, R20, R29 | 4.7kΩ Resistor | 13-MFR-25FRF52-4K7CT-ND | |
|
|
| R3, R12, R21, R30 | 100kΩ Resistor | 13-MFR-25FRF52-100KCT-ND | |
|
|
| R4, R13, R22, R31 | 100Ω Resistor | 13-MFR-25FRF52-100RCT-ND | |
|
|
| R6, R15, R24, R33 | 5.1kΩ Resistor | 13-MFR-25FRF52-5K1CT-ND | |
|
|
| R7, R16, R25, R34 | 10kΩ Resistor | 13-MFR-25FRF52-10KCT-ND |
|
|
| R8, R17, R26, R35 | 1kΩ Resistor | 13-MFR-25FRF52-1KCT-ND |
|
|
| R9, R18, R27, R36 | 300Ω Resistor | MFR-25FRF52-300R |
|
|
| R37 | 10kΩ SMD Resistor | 2019-RK73H2ATTD1002FCT-ND | |
|
|
| J1, J2, J3, J4 | 2Pin S2B-PH-K-S Connector | 455-1719-ND | PHR-2 plus SPH-002T-P0.5L is the counterpart |
|
|
| J5 | 5Pin S5B-PH-K-S Connector | 455-1722-ND | PHR-5 plus SPH-002T-P0.5L is the counterpart |
|