2 layers51 × 35.5 mm
AC to DC conveter
Raunak5/electronics-designs
A collection of analog, digital and PCB design projects created using KiCad.
11 parts
2 layers79.5 × 45 mm
Transformerless power supply
Raunak5/electronics-designsA collection of analog, digital and PCB design projects created using KiCad.
- Size
- 79.5 × 45 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 9
- Pads
- 37
- Tracks, vias
- 63, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Aug 2026
- Updated
- 15 Oct 2026
Overview
Transformerless power supply is an open-source printed circuit board by Raunak5, from the Raunak5/electronics-designs repository on GitHub. It is a 2-layer board of 79.5 × 45 mm with 19 parts on 9 nets, routed with 63 tracks and 0 vias.
Its parts include 7 diodes, 4 capacitors, 4 resistors, 2 connectors and 1 IC. It belongs with the power boards of this library.
README
README.mdKiCad Projects
This repository contains my KiCad practice projects and electronic circuit designs.
Projects:
- Transformerless Power Supply
- AC to DC Converter
- Simple Voltage Regulator
Tools Used:
- KiCad
- Git
- GitHub
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4 |
| 2 | 20k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | D_Zener | Diode_THT:D_A-405_P7.62mm_Horizontal | D5, D6 |
| 2 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J1, J2 |
| 1 | 0.1uF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1 |
| 1 | 1000uF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C2 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 225K/2.2uF | Capacitor_THT:C_Rect_L18.0mm_W7.0mm_P15.00mm_FKS3_FKP3 | C4 |
| 1 | 470uF | Capacitor_THT:CP_Radial_D10.0mm_P3.80mm | C3 |
| 1 | LED | LED_THT:LED_D5.0mm | D7 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
The 18 most common of 19 parts.
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Questions
How big is the Transformerless power supply PCB?
It measures 79.5 × 45 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Transformerless power supply use?
19 parts. 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 Transformerless power supply KiCad files?
From the Raunak5/electronics-designs repository on GitHub, at the commit this page was made from: the board is 0_transformerless_power_supply/Transformerless power supply.kicad_pcb and its schematic 0_transformerless_power_supply/Transformerless power supply.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Transformerless power supply design in my own project?
Its repository states no licence, so its author keeps all rights: ask Raunak5 before reusing the design.