
PedalIntermediate
rolfluc/VCR
Voltage Controlled Resistor for use as an intermediate to convert voltage into a resistance.

RP2040-Based Logic Analyzer that captures "state" mode
State Mode Logic Analyzer is an open-source printed circuit board by baldengineer, from the baldengineer/State-Mode-Logic-Analyzer repository on GitHub, published under the MIT licence. It is a 4-layer board of 82.8 × 56.7 mm with 134 parts on 116 nets, routed with 1,090 tracks and 167 vias.
It is built around the RP2040, 74LVC245APW and IS25LP128F-JBLE, with the 74HC4520D, AD5241BRZ1M and BZA856AVL among its other parts. Its parts include 40 resistors, 19 capacitors, 9 ICs, 7 diodes and 7 connectors. It belongs with the sensors and measurement boards and the RP2040 boards of this library.
Every logic analyzer available today samples asychrnously. On slower systems this is needlessly wasteful.
This logic analyzer works as a state mode capture. A clock on the device-under-test (DUT) drives the capture.
More to come...
| Qty | Value | Footprint | References |
|---|---|---|---|
| 37 | TestPoint_Harwin | My Libraries:Harwin-S1751-46-Test-Point | TP0, TP1, TP10, TP11, TP100, TP101, TP102, TP103, TP104, TP105, TP106, TP107, TP108, TP109, TP110, TP111 +21 |
| 16 | 220 | Resistor_SMD:R_0603_1608Metric | R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40 |
| 13 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4, C7, C8, C9, C11, C19, C20, C21, C22, C23, C24, C31 |
| 7 | 0 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9, R11, R12, R13, R15, R18, R19 |
| 6 | 4k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R5, R6, R7, R8 |
| 4 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R10, R14 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C5, C10, C12 |
| 3 | DNP | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R20, R21, R22 |
| 3 | MountingHole | MountingHole:MountingHole_2.7mm | H1, H2, H3 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R16, R17 |
| 2 | 27p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23, R24 |
| 2 | 74LVC245APW | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U10, U11 |
| 2 | DAC Disable | Jumper:SolderJumper-2_P1.3mm_Bridged2Bar_Pad1.0x1.5mm | JP4, JP5 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 1v1 | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D3 |
| 1 | 2040_L0 | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D6 |
| 1 | 3v3 | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D2 |
| 1 | 5V | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D1 |
| 1 | 5V USB0 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | 74HC4520D | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | A0 | Jumper:SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm | JP3 |
| 1 | AD0 | Jumper:SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm | JP1 |
| 1 | AD1 | Jumper:SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm | JP2 |
| 1 | AD5241BRZ1M | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U6 |
| 1 | Armed | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D4 |
| 1 | BZA856AVL | Package_TO_SOT_SMD:SOT-353_SC-70-5 | D7 |
| 1 | Boot 0 | Button_Switch_SMD:SW_SPST_PTS810 | SW2 |
| 1 | CLK Bypass | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP6 |
| 1 | ECS-120-18-33-JEM-TR | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | Exp In | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Horizontal | J4 |
| 1 | Exp Out | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Horizontal | J3 |
| 1 | G*** | My Libraries:BE5v2 | svg2mod |
| 1 | IS25LP128F-JBLE | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U7 |
| 1 | LTC6994xS6-1 | Package_TO_SOT_SMD:TSOT-23-6 | U4 |
| 1 | MCP1826S | Package_TO_SOT_SMD:SOT-223 | U9 |
| 1 | MCP4725 | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | Probe | Connector_PinHeader_2.54mm:PinHeader_2x12_P2.54mm_Vertical | J5 |
| 1 | Probe Power | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | Reset 0 | Button_Switch_SMD:SW_SPST_PTS810 | SW1 |
| 1 | SWD0 | FTSH-105-01-L-DV-K:SAMTEC_FTSH-105-XX-X-DV | J7 |
| 1 | Triggered | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D5 |
| 1 | USB0 | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
The 132 most common of 134 parts.
It measures 82.8 × 56.7 mm and has 4 copper layers, 1.6 mm thick.
134 parts, built around the RP2040, 74LVC245APW, IS25LP128F-JBLE and 74HC4520D. 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 baldengineer/State-Mode-Logic-Analyzer repository on GitHub, at the commit this page was made from: the board is kicad/state mode logic analyzer.kicad_pcb and its schematic kicad/state mode logic analyzer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

rolfluc/VCR
Voltage Controlled Resistor for use as an intermediate to convert voltage into a resistance.

baldengineer/Mega-IIe
Using the Mega II from a IIgs to make a Apple IIe compatible computer: The Mega IIe!



abelwu2001/Picosat-Pocketcube-UTN-FRC-2026
Proyecto Final para el armado de un nanoSat


KITTY-6502/hardware
the KITTY is a 65c02 homebrew kit microcomputer designed around text mode graphics and cartridge media. It is fully open source, and uses exclusively in-production parts.

timex-sinclair-projects/tspico-hardware
Status 2026-10-19: prototype 3 (v3.0-proto3, changes below). Proto1 (v3.0-proto1) was built and brought up; proto2 added its fixes (below).