# Handheld Socketed Module Console ## Description Handheld computing carrier board for a salvaged CPU module using a 100-pin mezzanine socket, with preserved 2S battery charging, balancing, and service-friendly edge I/O. ## Project Details - **Owner:** risk4444 - **Created:** 8/25/2025 - **Last Updated:** 4/21/2026 - **Visibility:** Public - **Operating Voltage:** Battery-backed portable system rails derived from charger/power-path subsystem - **Power Requirements:** USB charging input with handheld battery operation, power-path management, and multi-cell battery balancing/protection support - **Implementation Details:** Handheld form factor using a socketed removable CPU/module instead of fixed compute, with serviceable replacement and compact board organization - **Connector Type:** Socketed mezzanine CPU module plus external handheld I/O - **Stars:** 1 ## Key Components ### — [123A-40M00](https://www.flux.ai/baueralex174/123a-40m00~c0.md) - Manufacturer Part Number: 123A-40M00 - Manufacturer Name: Attend - LCSC Part Number: C6383750 **Pins:** - P1 - P10 - P11 - P12 - P13 - P14 - P15 - P16 - P17 - P18 - P19 - P2 - P20 - P21 - P22 - P23 - P24 - P25 - P26 - P27 - P28 - P29 - P3 - P30 - P31 - P32 - P33 - P34 - P35 - P36 - P37 - P38 - P39 - P4 - P40 - P41 - P42 - P43 - P44 - P45 - P46 - P47 - P48 - P49 - P5 - P50 - P51 - P52 - P53 - P54 - P55 - P56 - P57 - P58 - P6 - P67 - P68 - P69 - P7 - P70 - P71 - P72 - P73 - P74 - P75 - P8 - P9 ### J3 — [DF40HC(3.0)-100DS-0.4V(51)](https://www.flux.ai/adrian95/df40hc3p0-100ds-0p4v51~qko.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Connector Type: Board-to-board mezzanine - Connector Rows: 2 - Package: Board-to-board - Role: CPU Module Socket - Manufacturer Name: Hirose - Datasheet URL: https://www.hirose.com/en/product/document?clcode=&productname=&series=DF40&documenttype=Catalog&lang=en&documentid=en_DF40_CAT - Manufacturer Part Number: DF40HC(3.0)-100DS-0.4V(51) - Implementation Details: Pins 1-14 dedicated GND returns, pins 77/79/81/83/85/87 VSYS feeds, pin 82 reserved low-speed control rail; all remaining pins intentionally reserved and currently isolated pending salvaged CPU module pin map. - Role Details: Primary mezzanine socket for removable salvaged CPU/module; reserved interface groups include power, ground, battery-management control, debug, clocks, storage, display, USB, and networking for handheld integration. - Connector Pitch: 0.4mm - Package or Case Code: DF40HC30100DS04V51 - Connector Positions: 100 **Pins:** - 1 [pin 1] - 10 [pin 10] - 100 [pin 100] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 2 [pin 2] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] - 23 [pin 23] - 24 [pin 24] - 25 [pin 25] - 26 [pin 26] - 27 [pin 27] - 28 [pin 28] - 29 [pin 29] - 3 [pin 3] - 30 [pin 30] - 31 [pin 31] - 32 [pin 32] - 33 [pin 33] - 34 [pin 34] - 35 [pin 35] - 36 [pin 36] - 37 [pin 37] - 38 [pin 38] - 39 [pin 39] - 4 [pin 4] - 40 [pin 40] - 41 [pin 41] - 42 [pin 42] - 43 [pin 43] - 44 [pin 44] - 45 [pin 45] - 46 [pin 46] - 47 [pin 47] - 48 [pin 48] - 49 [pin 49] - 5 [pin 5] - 50 [pin 50] - 51 [pin 51] - 52 [pin 52] - 53 [pin 53] - 54 [pin 54] - 55 [pin 55] - 56 [pin 56] - 57 [pin 57] - 58 [pin 58] - 59 [pin 59] - 6 [pin 6] - 60 [pin 60] - 61 [pin 61] - 62 [pin 62] - 63 [pin 63] - 64 [pin 64] - 65 [pin 65] - 66 [pin 66] - 67 [pin 67] - 68 [pin 68] - 69 [pin 69] - 7 [pin 7] - 70 [pin 70] - 71 [pin 71] - 72 [pin 72] - 73 [pin 73] - 74 [pin 74] - 75 [pin 75] - 76 [pin 76] - 77 [pin 77] - 78 [pin 78] - 79 [pin 79] - 8 [pin 8] - 80 [pin 80] - 81 [pin 81] - 82 [pin 82] - 83 [pin 83] - 84 [pin 84] - 85 [pin 85] - 86 [pin 86] - 87 [pin 87] - 88 [pin 88] - 89 [pin 89] - 9 [pin 9] - 90 [pin 90] - 91 [pin 91] - 92 [pin 92] - 93 [pin 93] - 94 [pin 94] - 95 [pin 95] - 96 [pin 96] - 97 [pin 97] - 98 [pin 98] - 99 [pin 99] ### U13 — [MP2672AGD-0000-P](https://www.flux.ai/adrian95/mp2672agd-0000-p~cm6.md) - Package: QFN-18 - Role Details: 2S Li-ion charger with integrated power-path and balancing for handheld system battery pack - Implementation Details: Preserved as handheld 2S charger and power-path front end. Active rails are CHG_IN, BAT_MID, VBAT_PACK, VSYS, CHG_CTRL, and GND. Nonessential digital/status pins are intentionally isolated pending system controller assignment. - Datasheet URL: https://www.mouser.com/datasheet/2/277/MP2672AGD-1947369.pdf - Role: Battery Charger - Part Type: Integrated Circuit - Manufacturer Part Number: MP2672AGD-0000-P - Manufacturer Name: Monolithic Power Systems Inc. - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~ACOK [pin 18] - ~STAT [pin 16] - AGND [pin 6] - BATT [pin 10] - BST [pin 3] - CV [pin 17] - IN [pin 1] - ISET [pin 5] - MID [pin 9] - NTC [pin 8] - PGND [pin 13] - SCL [pin 14] - SDA [pin 15] - SW_1 [pin 2] - SW_2 [pin 12] - SYS [pin 11] - VCC [pin 4] - VLIM [pin 7] ### U14 — [BQ76920PW](https://www.flux.ai/kicad-part-library/bq76920pw~da.md) - Role: Battery Monitor - Manufacturer Part Number: BQ76920PW - Package: TSSOP-20 - Role Details: Cell monitor and balancing controller supervising the handheld 2S battery pack protection interface - Datasheet URL: http://www.ti.com/lit/ds/symlink/bq76920.pdf - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: TSSOP-20_4.4x6.5mm_P0.65mm - Implementation Details: Preserved as the 2S battery monitor and balancing supervisor. Active rails are VBAT_PACK, BAT_MID, BAL_CTRL, I2C_SCL, I2C_SDA, and GND. Alert, charge/discharge drive, thermistor, and sense terminals are intentionally isolated pending future protection FET and host interface definition. **Pins:** - ALERT [pin 20] - BAT [pin 10] - CAP1 [pin 7] - CHG [pin 2] - DSG [pin 1] - NC [pin 11] - REGOUT [pin 8] - REGSRC [pin 9] - SCL [pin 5] - SDA [pin 4] - SRN [pin 19] - SRP [pin 18] - TS1 [pin 6] - VC0 [pin 17] - VC1 [pin 16] - VC2 [pin 15] - VC3 [pin 14] - VC4 [pin 13] - VC5 [pin 12] - VSS [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/risk4444/handheld-socketed-module-console~as](https://www.flux.ai/risk4444/handheld-socketed-module-console~as).* --- *Generated from [https://www.flux.ai/risk4444/handheld-socketed-module-console~as](https://www.flux.ai/risk4444/handheld-socketed-module-console~as)*