# 8-Channel Thermal Validation Controller ## Description ESP32-based eight-channel K-type thermocouple acquisition and fail-safe 24 V, 5 A heater controller with onboard power conversion. ## Project Details - **Owner:** enriquersr - **Created:** 9/10/2026 - **Last Updated:** 9/26/2026 - **Visibility:** Public - **Stars:** 1 ## Key Components ### D1 — [SMBJ33A-13-F](https://www.flux.ai/lcsc/smbj33a-13-f~jw2e.md) - LCSC Part Number: C135067 - Manufacturer Name: DIODES(美台) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ33A-13-F_C135067.pdf - Functional Group: Input & Power - Role Details: 33V standoff 600W TVS after fuse; coordinates with regulated 24V source and 65V protection controller. Final surge environment must be bench-validated. - JLCPCB Part Class: Extended Part - Role: Input Surge Clamp - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ33A-13-F_SMBJ33A-13-F_C135067.html - Manufacturer Part Number: SMBJ33A-13-F - Part Type: TVS - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SMBJ33A-13-F](https://www.flux.ai/lcsc/smbj33a-13-f~jw2e.md) - Part Type: TVS - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Manufacturer Part Number: SMBJ33A-13-F - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ33A-13-F_SMBJ33A-13-F_C135067.html - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ33A-13-F_C135067.pdf - Manufacturer Name: DIODES(美台) - Role Details: 33V standoff TVS from switched heater node to ground clamps cable-inductance overshoot below 100V MOSFET rating; repetitive stress must be measured at final PWM/cable length. - LCSC Part Number: C135067 - Role: Heater Node Clamp - Functional Group: Heater Output **Pins:** - A [pin 2] - K [pin 1] ### D3 — [SS34](https://www.flux.ai/lcsc/ss34~6q67.md) - Role Details: Series Schottky from onboard 5V buck to DevKit 5V pin prevents USB VBUS from back-feeding the buck rail; forward drop included in DevKit supply margin. - Forward Voltage: 0.3V to 0.45V - Manufacturer Part Number: SS34 - Part Type: Schottky Barrier Diodes (SBD) - Diode Type: Schottky - Manufacturer Name: UMW(友台半导体) - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.lcsc.com/datasheet/C2758511.pdf - Reverse Voltage: 40V - Role: USB Backfeed Isolation - Functional Group: Input & Power,MCU Host - LCSC Part Number: C2758511 - Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [LM5013DDAR](https://www.flux.ai/adrian95/lm5013ddar.md) - Symbol Style: parametric-v1 - Manufacturer Part Number: LM5013DDAR - Package or Case Code: 8-powerSoic - Role Details: 100V, 3.5A LM5013 selected after worst-case logic budget; provides large input transient and ESP32 RF peak margin. Exact datasheet 5V application values required. - Part Type: Linear Regulator - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/524b6a450a52e5e852f95c810d6c7b8c899bf7c1b5c33bba9a82499d324d039d.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Functional Group: Input & Power - Role: 24V to 5V Buck - Manufacturer Name: Texas Instruments **Pins:** - BST [pin 7] - EN/UVLO [pin 3] - EP [pin 9] - FB [pin 5] - GND [pin 1] - PGOOD [pin 6] - RON [pin 4] - SW [pin 8] - VIN [pin 2] ### J1 — [1729128](https://www.flux.ai/adrian95/1729128~gmm.md) - Manufacturer Name: Phoenix Contact - Role Details: Phoenix Contact 2-position 5.08mm terminal block, 17.5A/400V nominal; exceeds 24V 5A system current. - Package or Case Code: 1729128 - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1729128 - Datasheet URL: http://www.phoenixcontact.net/product/1729128 - Role: Power Connector - Functional Group: Input & Power **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [1729128](https://www.flux.ai/adrian95/1729128~gmm.md) - Datasheet URL: http://www.phoenixcontact.net/product/1729128 - Manufacturer Part Number: 1729128 - Functional Group: Heater Output - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Package or Case Code: 1729128 - Role Details: Phoenix Contact 2-position 5.08mm terminal block, 17.5A/400V nominal; carries protected 24V and 5A switched return. - Manufacturer Name: Phoenix Contact - Role: Heater Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [DMT6008LFG](https://www.flux.ai/kicad-part-library/dmt6008lfg~qw.md) - Role Details: 60V 7.5mΩ external MOSFET for LM74700; approximately 0.19W at 5A, subject to final copper thermal validation. - Package or Case Code: Diodes_PowerDI3333-8 - Manufacturer Part Number: DMT6008LFG - Functional Group: Input & Power - Role: Ideal Diode MOSFET - Datasheet URL: https://www.diodes.com/assets/Datasheets/DMT6008LFG.pdf **Pins:** - D [pin 5] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q2 — [BSC040N10NS5ATMA1](https://www.flux.ai/adrian95/bsc040n10ns5atma1.md) - Role Details: 100V N-MOSFET, 4mΩ max at 10V; conduction loss about 0.10W at 5A before temperature rise. Gate driven from protected 12V bias; verify SOA and thermal copper at final PWM. - Datasheet URL: https://www.infineon.com/assets/row/public/documents/24/49/infineon-bsc040n10ns5-datasheet-en.pdf?fileId=5546d4624a0bf290014a0fbcee2e6b38 - Role: Heater Switch - Part Type: Transistors - Symbol Style: parametric-v1 - Manufacturer Part Number: BSC040N10NS5ATMA1 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Infineon - Functional Group: Heater Output **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### SW1 — [434123043816](https://www.flux.ai/silicon-yard/434123043816.md) - Role: Manual Safety Reset - Manufacturer Part Number: 434123043816 - Manufacturer Name: Würth - Functional Group: Safety Interlock - Mount: Surface Mount - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/0c826312ad255f59a78fc262307a6aec36b1b26d9e56f71c12b166f606cbd328.pdf - Part Type: Electromechanical Components - Role Details: Momentary SPST-NO pushbutton requests latch clear; logic prevents clearing while aggregate fault remains asserted. **Pins:** - COM [pin 1] - NO [pin 2] ### U1 — [ESP32-DEVKITC-32UE](https://www.flux.ai/adrian95/esp32-devkitc-32ue~ba.md) - Datasheet URL: https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32/esp-dev-kits-en-master-esp32.pdf - Role: MCU Host - Functional Group: MCU Host - Role Details: Library DevKitC carrier symbol/footprint proxy; BOM must be ESP32-DevKitC-32E non-PSRAM. DevKitC-32UE proxy chosen only because exact 32E library entry is unavailable; verify identical V4 header/mechanical geometry before PCB release. - Manufacturer Name: Espressif Systems - Allow Substitutes: No - Symbol Style: parametric-v1 - Manufacturer Part Number: ESP32-DEVKITC-32E - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Development Board **Pins:** - 3V3 [pin 1] - 5V [pin 19] - CLK [pin 38] - CMD [pin 18] - D0 [pin 37] - D1 [pin 36] - D2 [pin 16] - D3 [pin 17] - EN [pin 2] - GND [pin 26] - GND [pin 20] - GND [pin 14] - GPIO0 [pin 33] - GPIO12 [pin 13] - GPIO13 [pin 15] - GPIO14 [pin 12] - GPIO15 [pin 35] - GPIO16 [pin 31] - GPIO17 [pin 30] - GPIO18 [pin 28] - GPIO19 [pin 27] - GPIO2 [pin 34] - GPIO21 [pin 25] - GPIO22 [pin 22] - GPIO23 [pin 21] - GPIO25 [pin 9] - GPIO26 [pin 10] - GPIO27 [pin 11] - GPIO32 [pin 7] - GPIO33 [pin 8] - GPIO34 [pin 5] - GPIO35 [pin 6] - GPIO4 [pin 32] - GPIO5 [pin 29] - RX [pin 24] - TX [pin 23] - VN [pin 4] - VP [pin 3] ### U10 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Symbol Style: Parametric - Manufacturer Name: Omega - Manufacturer Part Number: PCC-SMP-K-5 - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Part Type: Connector - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Role: Thermocouple Socket **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U11 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Symbol Style: Parametric - Manufacturer Name: Omega - Manufacturer Part Number: PCC-SMP-K-5 - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role: Thermocouple Socket - Part Type: Connector **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U12 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Symbol Style: Parametric - Manufacturer Part Number: PCC-SMP-K-5 - Manufacturer Name: Omega - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Role: Thermocouple Socket - Part Type: Connector - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U13 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Manufacturer Part Number: PCC-SMP-K-5 - Manufacturer Name: Omega - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Symbol Style: Parametric - Part Type: Connector - Role: Thermocouple Socket - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U14 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Role: Thermocouple Socket - Symbol Style: Parametric - Manufacturer Name: Omega - Manufacturer Part Number: PCC-SMP-K-5 - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Part Type: Connector **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U15 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Role: Thermocouple Socket - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Part Type: Connector - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Symbol Style: Parametric - Manufacturer Name: Omega - Manufacturer Part Number: PCC-SMP-K-5 **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U16 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Role: Thermocouple Socket - Part Type: Connector - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Symbol Style: Parametric - Manufacturer Part Number: PCC-SMP-K-5 - Manufacturer Name: Omega **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U17 — [PCC-SMP-K-5](https://www.flux.ai/cherepanyadima/pcc-smp-k-5~iy.md) - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Part Type: Connector - Datasheet URL: https://assets.omega.com/spec/PCC-OST-SMP_spec.pdf - Role Details: Omega K-type miniature PCB receptacle with thermocouple-alloy contacts; footprint must be checked against Omega mechanical drawing before release. - Symbol Style: Parametric - Manufacturer Name: Omega - Manufacturer Part Number: PCC-SMP-K-5 - Role: Thermocouple Socket **Pins:** - NEG [pin NEG] - POS [pin POS] - SHIELD [pin S2] - SHIELD [pin S1] ### U18 — [TPS7A2033PDBVR](https://www.flux.ai/lcsc/tps7a2033pdbvr~89ay.md) - Manufacturer Part Number: TPS7A2033PDBVR - Functional Group: Input & Power - Part Type: Power Management - Package or Case Code: SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - Role: Clean Sensor LDO - JLCPCB Part Class: Extended Part - LCSC Part Number: C2862740 - Role Details: Low-noise 300mA fixed 3.3V LDO dedicated to eight MAX31856 devices and safety logic; ample margin over estimated sub-100mA load. - Manufacturer Name: TI(德州仪器) - Datasheet URL: https://www.lcsc.com/datasheet/C2862740.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhaVFZURllbUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - NC [pin 4] - OUT [pin 5] ### U19 — [LM74700QDBVRQ1](https://www.flux.ai/silicon-yard/lm74700qdbvrq1~gr.md) - Manufacturer Part Number: LM74700QDBVRQ1 - Manufacturer Name: Texas Instruments - Role: Reverse Polarity Controller - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/5b664c4286cb0717e8b6b5bb13207f916b39c5e4547b6e096a102ba7dfa8f6ca.pdf - Functional Group: Input & Power - Role Details: 65V ideal-diode controller driving external N-MOSFET; protects 24V input against reverse polarity with low loss at 5A. - Symbol Style: parametric-v1 **Pins:** - ANODE [pin 6] - CATHODE [pin 4] - EN [pin 3] - GATE [pin 5] - GND [pin 2] - VCAP [pin 1] ### U2 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Manufacturer Part Number: MAX31856MUD+ - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role: Thermocouple Digitizer - Part Type: Integrated **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U20 — [UCC27511DBVR](https://www.flux.ai/jecstronic/ucc27511dbvr~rhd.md) - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 4A source/8A sink low-side driver powered from 12V gate-bias rail; non-inverting input receives hardware-qualified heater command. - Part Type: Power Management - Symbol Style: parametric-v1 - Manufacturer Part Number: UCC27511DBVR - Datasheet URL: https://www.ti.com/lit/ds/symlink/ucc27511.pdf - Functional Group: Heater Output - Role: Gate Driver **Pins:** - GND [pin 4] - IN- [pin 5] - IN+ [pin 6] - OUTH [pin 2] - OUTL [pin 3] - VDD [pin 1] ### U21 — [SN74LVC2G74QDCURQ1](https://www.flux.ai/lcsc/sn74lvc2g74qdcurq1~k9ko.md) - Product Info Url: https://lcsc.com/product-detail/74-Series_TI_SN74LVC2G74QDCURQ1_SN74LVC2G74QDCURQ1_C132002.html - Functional Group: Safety Interlock - Manufacturer Part Number: SN74LVC2G74QDCURQ1 - Part Type: Flip Flops - LCSC Part Number: C132002 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010302_Texas-Instruments-SN74LVC2G74QDCURQ1_C132002.pdf - Role: Fault Latch - Package or Case Code: VSSOP-8_L2.3-W2.0-P0.50-LS3.1-BR - Manufacturer Name: TI(德州仪器) - Role Details: D flip-flop with asynchronous preset/clear. Active-low aggregate FAULT asynchronously presets latched-fault Q; reset clear is hardware-gated so it cannot clear while FAULT remains active. - JLCPCB Part Class: Extended Part **Pins:** - ~{CLR} [pin 6] - ~{PRE} [pin 7] - ~{Q} [pin 3] - CLK [pin 1] - D [pin 2] - GND [pin 4] - Q [pin 5] - VCC [pin 8] ### U22 — [SN74LVC1G04DBVR](https://www.flux.ai/lcsc/sn74lvc1g04dbvr~w1fc.md) - Symbol Style: parametric-v1 - Manufacturer Name: UMW(友台半导体) - Role Details: Creates FAULT_ACTIVE high from open-drain active-low aggregate FAULT_N for reset gating. - Voltage Supply: 1.65 ~ 5.5V - Supply Current (max): 10uA - Product Info Url: https://lcsc.com/product-detail/Gates-and-Inverters_Youtai-Semiconductor-Co-Ltd-SN74LVC1G04DBVR_C434067.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2405141144_UMW-Youtai-Semiconductor-Co---Ltd--SN74LVC1G04DBVR_C434067.pdf - Role: Fault Polarity Inverter - JLCPCB Part Class: Extended Part - Functional Group: Safety Interlock - LCSC Part Number: C434067 - Package or Case Code: SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR - Operating Temperature: -40℃~+125℃ - Part Type: Gates - Manufacturer Part Number: SN74LVC1G04DBVR **Pins:** - A [pin 2] - GND [pin 3] - NC [pin 1] - VCC [pin 5] - Y [pin 4] ### U23 — [NC7SZ32M5X](https://www.flux.ai/adrian95/nc7sz32m5x~7w.md) - Functional Group: Safety Interlock - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: NC7SZ32M5X - Manufacturer Name: onsemi - Role: Reset Safety OR - Part Type: Integrated Circuit - Role Details: Forces latch clear input inactive whenever a thermocouple fault is active; manual/POR clear is accepted only after FAULT_N returns high. - Datasheet URL: https://www.onsemi.com/pdf/datasheet/nc7sz32-d.pdf **Pins:** - PROG [pin 5] - STAT [pin 1] - VBAT [pin 3] - VIN [pin 4] - VSS [pin 2] ### U24 — [74AHC1G08SE-7](https://www.flux.ai/adrian95/74ahc1g08se-7~7i5.md) - Role: Reset Request AND - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/74AHC1G08.pdf - Role Details: Combines manual-reset-not and power-on-reset-not; output goes low for either reset request. - License: https://creativecommons.org/licenses/by/4.0/ - Functional Group: Safety Interlock - Manufacturer Part Number: 74AHC1G08SE-7 - Part Type: Integrated Circuit **Pins:** - A [pin 1] - B [pin 2] - GND [pin 3] - VCC [pin 5] - Y [pin 4] ### U25 — [74AHC1G08SE-7](https://www.flux.ai/adrian95/74ahc1g08se-7~7i5.md) - Manufacturer Name: Diodes Incorporated - Role: Heater Permission AND - Datasheet URL: https://www.diodes.com/assets/Datasheets/74AHC1G08.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Functional Group: Safety Interlock,Heater Output - Role Details: Hardware gates GPIO26 PWM with latch Q-bar. Either MCU-low/disconnected or latched fault forces driver input low. - Part Type: Integrated Circuit - Manufacturer Part Number: 74AHC1G08SE-7 **Pins:** - A [pin 1] - B [pin 2] - GND [pin 3] - VCC [pin 5] - Y [pin 4] ### U26 — [TLV803EA30DBZR](https://www.flux.ai/adrian95/tlv803ea30dbzr~dwm.md) - Functional Group: Safety Interlock - Part Type: Integrated Circuits - Manufacturer Part Number: TLV803EA30DBZR - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/26c6d6ec88e3eafb55b6479ee2983cf1708fcf4b7699b33da4317359fd0cecd6.pdf - Manufacturer Name: Texas Instruments - Role Details: 3.08V open-drain supervisor guarantees reset request during 3.3V power-up/brownout so heater latch powers into OFF state. - Role: Power-On Reset Supervisor - Package or Case Code: SOT-23-6 - Symbol Style: parametric-v1 **Pins:** - GND [pin 1] - RESET [pin 2] - VDD [pin 3] ### U3 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Manufacturer Part Number: MAX31856MUD+ - Role: Thermocouple Digitizer - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Part Type: Integrated **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U4 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Manufacturer Part Number: MAX31856MUD+ - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Role: Thermocouple Digitizer - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Part Type: Integrated - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U5 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Part Type: Integrated - Role: Thermocouple Digitizer - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Manufacturer Part Number: MAX31856MUD+ - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U6 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Part Type: Integrated - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Manufacturer Part Number: MAX31856MUD+ - Role: Thermocouple Digitizer **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U7 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Part Type: Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Role: Thermocouple Digitizer - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Manufacturer Part Number: MAX31856MUD+ **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U8 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Manufacturer Part Number: MAX31856MUD+ - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Role: Thermocouple Digitizer - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Part Type: Integrated **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U9 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Functional Group: Thermocouple CH0,Thermocouple CH1,Thermocouple CH2,Thermocouple CH3,Thermocouple CH4,Thermocouple CH5,Thermocouple CH6,Thermocouple CH7 - Part Type: Integrated - Role: Thermocouple Digitizer - Role Details: One MAX31856MUD+ per K-type channel; 3.3V SPI, independent CS, hardware FAULT aggregation. - Manufacturer Part Number: MAX31856MUD+ - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/enriquersr/8-channel-thermal-validation-controller~va](https://www.flux.ai/enriquersr/8-channel-thermal-validation-controller~va).* --- *Generated from [https://www.flux.ai/enriquersr/8-channel-thermal-validation-controller~va](https://www.flux.ai/enriquersr/8-channel-thermal-validation-controller~va)*