Soldering iron s
AmitBarman99·Soldering-iron-s-pcb
About the Soldering iron s PCB
Soldering iron s is an open source AVR/Arduino PCB design by AmitBarman99, published on GitHub. It is a 2-layer board measuring 75.1 × 21.6 mm, with 28 components from 20 distinct parts.
Its main chip is the ATmega328P-A, from the AVR/Arduino family. Other key parts include the TSR_1-2490 and LM358. By type, the board carries 10 resistors, 4 ICs, 4 connectors, 4 capacitors, 2 transistors and 2 switches.
It belongs with the displays & leds and sensors designs in this gallery.
From the project
The PCB board of a portable Soldering iron with temperature display and increment-decrement switchs
1. OLED temperature display 2. Increment push button 3. Decrement push button 4. USB port for programming 5. 90 degree orientation input-output plug
The 3D view of this soldering iron's pcb is here :
Credit : AMIT BARMAN ETC undergrad at IIESTS'25

Main components on the Soldering iron s
Soldering iron s bill of materials (BOM)
28 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATmega328P-A | TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | TSR_1-2490 | Converter_DCDC_TRACO_TSR-1_THT | U2 |
| 1 | LM358 | DIP-8_W7.62mm_Socket_LongPads | U3 |
| 1 | PinHeader_1x04_P2.00mm_Vertical | PinHeader_1x04_P2.00mm_Vertical | U4 |
| 1 | 2SC1945 | TO-220-3_Vertical | Q1 |
| 1 | IRF4905 | TO-220-3_Vertical | Q2 |
| 1 | Crystal_16MHz | Crystal_DS10_D1.0mm_L4.3mm_Horizontal_1EP_style1 | Y1 |
| 1 | USB_B_Micro | USB_Micro-AB_Molex_47590-0001 | J1 |
| 1 | PORT | Hirose_DF13-05P-1.25DS_1x05_P1.25mm_Horizontal | J2 |
| 1 | VIBRATOR | JWT_A3963_1x02_P3.96mm_Vertical | J3 |
| 1 | Plug | JWT_A3963_1x02_P3.96mm_Vertical | P1 |
| 2 | SW_Push | SW_PUSH_6mm_H5mm | SW1, SW2 |
| 1 | 1N5819 | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 3 | 0.1uF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C2, C3 |
| 1 | 2.2nF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4 |
| 4 | 10K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R4, R7, R10 |
| 1 | 1M | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 2 | 1k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R6 |
| 1 | 200k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5 |
| 2 | 2K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R8, R9 |
Soldering iron s design files
The KiCad project lives in the AmitBarman99/Soldering-iron-s-pcb repository on GitHub; these links point at the commit this page was built from.
- Layoutsoldering_iron.kicad_pcb
- Schematicsoldering_iron.kicad_sch
Soldering iron s: common questions
What microcontroller does the Soldering iron s use?
The Soldering iron s is built around the ATmega328P-A, from the AVR/Arduino family.
How big is the Soldering iron s PCB?
The Soldering iron s measures 75.1 × 21.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Soldering iron s?
28 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Soldering iron s design files?
From the AmitBarman99/Soldering-iron-s-pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Soldering iron s design in my own project?
The repository has no license, so all rights stay with AmitBarman99. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Soldering iron s without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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