2 layers73.1 × 65.2 mm
Module dual powerstage tiled
Squantor/DiySolderingStation
Do it yourself soldering station
252 parts7MIT
2 layers80 × 80 mm
User interface
Squantor/DiySolderingStation7Do it yourself soldering station
- Size
- 80 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 91
- Nets
- 48
- Pads
- 281
- Tracks, vias
- 536, 38
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 May 2020
- Updated
- 2 Oct 2026
Overview
User interface is an open-source printed circuit board by Squantor, from the Squantor/DiySolderingStation repository on GitHub, published under the MIT licence. It is a 2-layer board of 80 × 80 mm with 91 parts on 48 nets, routed with 536 tracks and 38 vias.
It is built around the PCF8574T and RB521S-30. Its parts include 46 resistors, 15 diodes, 12 capacitors, 5 switches and 2 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
2
PCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O Expanders
RB521S-30
SOD-5231 Independent 1A 200mA 30V 30uA@10V 500mV@200mA SOD-523 Schottky Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Schottky Diodes
README
electronics/POC_temp_sens/README.mdProof of concept JBC T245 and T115 temperature sensing circuit
JBC T245 handle thermocouple sensing circuit as copied/adapted from the reverse engineered CD-2BC schematic. The PCB is made to imitate a 2.54mm pitch prototyping board cut to size to fit the prototype. On top of this protoboard a small size nuclone with LPC845 microcontroller is put on top.
HSI (Hardware Software Interface)
- ADC voltage reference is 3V REF3030AIDBZT
- Crystal connected to pin 0_08 and 0_09
- Pin 0_24: UART RX connected to CH340B TX
- Pin 0_25: UART TX connected to CH340B RX
- Pin 0_12: Bootloader pin connected to switch with 10K pullup and 100nF capacitor, switch impedance is 100Ohm.
- Pin 0_04: 5V presence detection done with a resistive divider with 5.6K from 5V to 10K to ground
- Pin 1_00, Pin 1_01, Pin 1_02: 74HC4053 multiplexer 1, pulled down by 100K resistor
- Mux setting 0: NT115 connector pin 1, C1 connection through 22K 1% resistor
- Mux setting 1: NT115 connector pin 4, C2 connection through 22K 1% resistor
- Mux setting 2: NT115 connector pin 3, C3 connection through 22K 1% resistor
- Mux setting 3: T245 connector pin 1, C1 connection through 22K 1% resistor
- Mux setting 4: T245 connector pin 5, C2 connection through 22K 1% resistor
- Mux setting 5: T245 connector pin 2, C3 connection through 22K 1% resistor
- Mux setting 6:
- Mux setting 7:
- Pin 1_05, Pin 1_06, Pin 1_07: 74HC4053 multiplexer 2, pulled down by 100K resistor
- Mux setting 0: NT115 connector pin 5, C1 connection through 22K 1% resistor
- Mux setting 1: NT115 connector pin 4, C2 connection through 22K 1% resistor
- Mux setting 2: NT115 connector pin 3, C3 connection through 22K 1% resistor
- Mux setting 3: T245 connector pin 1, C1 connection through 22K 1% resistor
- Mux setting 4: T245 connector pin 5, C2 connection through 22K 1% resistor
- Mux setting 5: T245 connector pin 2, C3 connection through 22K 1% resistor
- Mux setting 6:
- Mux setting 7:
- Pin 0_07: Differential voltage with gain X from multiplexer 1 and 2, range X V and filtered by X kohm with X nF
TODO's
- Building up prototype
- Test & characterise
- update Readme.md with pictures and BOM
BOM
- OP07 opamp
- LM358 dual opamp
- 74HC4053 multiplexer
- Small nuclone LPC845 with USB2UART and serial flash, 3V ADC voltage reference.
Pictures
Measurements
Parts
91| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 4.7K | SquantorRcl:R_0603_hand | R1, R10, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R44, R45 +6 |
| 17 | TBD | SquantorRcl:R_0603_hand | R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R38, R40 +1 |
| 8 | 100n | SquantorRcl:C_0603 | C4, C5, C6, C7, C8, C9, C10, C11 |
| 8 | 5V | SquantorDiodes:SOD-523 | D5, D6, D7, D8, D9, D10, D11, D15 |
| 7 | RB521S-30 | SquantorDiodes:SOD-523 | D1, D2, D3, D4, D12, D13, D14 |
| 4 | Cherry Blue | MX_Only:MXOnly-1U-NoLED | S1, S2, S3, S4 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 100 | SquantorRcl:R_0603_hand | R2, R3, R4 |
| 3 | 1u | SquantorRcl:C_0603 | C2, C3, C12 |
| 2 | 0 | SquantorRcl:R_0603_hand | R39, R42 |
| 2 | PCF8574 | SquantorIC:SOT162-1-NXP | U1, U2 |
| 1 | 10u | SquantorRcl:C_0603 | C1 |
| 1 | 1K | SquantorRcl:R_0603_hand | R25 |
| 1 | 600 | SquantorRcl:L_0603 | FB1 |
| 1 | ALPS_EC11E18244A5 | SquantorSwitches:ALPS_EC11E_style5 | SW1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | Conn_01x06 | Connector_JST:JST_PH_S6B-PH-K_1x06_P2.00mm_Horizontal | J1 |
| 1 | Conn_02x05_Odd_Even | SquantorConnectors:Header-0254-2X05-H010 | J2 |
| 1 | LCM1602 | SquantorModules:LCM1602K | A1 |
| 1 | NTC? | SquantorRcl:R_0603_hand | R43 |
| 1 | OHWLOGO | Symbol:OSHW-Symbol_6.7x6mm_SilkScreen | N1 |
| 1 | V20200605 | SquantorLabels:Label_Generic | N2 |
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Questions
How big is the User interface PCB?
It measures 80 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the User interface use?
91 parts, built around the PCF8574T and RB521S-30. 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 User interface KiCad files?
From the Squantor/DiySolderingStation repository on GitHub, at the commit this page was made from: the board is electronics/user_interface/user_interface.kicad_pcb and its schematic electronics/POC_temp_control/POC_temp_control.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the User interface design in my own project?
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).