2 layers100 × 74 mm
Qym solder
basson/qym-solder
QymSolder - Soldering station three in one - hakko t12, hot air gun, d909/898D or analog.
135 parts4GPL-3.0
2 layers50 × 31 mm
ZeroCrossPower
UserHackable/ZeroCrossPowerZeroCrossPower
- Size
- 50 × 31 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 9
- Pads
- 35
- Tracks, vias
- 37, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Apr 2016
- Updated
- 20 Jul 2026
Overview
ZeroCrossPower is an open-source printed circuit board by UserHackable, from the UserHackable/ZeroCrossPower repository on GitHub. It is a 2-layer board of 50 × 31 mm with 14 parts on 9 nets, routed with 37 tracks and 0 vias.
It is built around the H11AA1. Its parts include 4 diodes, 3 resistors and 2 capacitors.
Main components
1README
README.mdZero Crossing Detector and Power Supply
I used this board in my Range Rebuild to give me zero crossing detection, as well as provide power using a simple AC wall wart style transformer, and a linear regulator.
This allows me to drive my solid state relays at zero crossing, and use the inherent frequency of the power line as the clock for a very slow PWM for power control.
ZeroCrossPower
Board dimensions
- (196851, 122047) original units
- (1.9685, 1.2205) inches
- (50.0002, 30.9999) mm
| Front | Back |
|---|---|
 |  |
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | DIODE-1N4001-KIT | D1, D2, D3, D4 | |
| 3 | AXIAL-0.3 | R1, R2, R3 | |
| 2 | M023.5MM | SCREWTERMINAL-3.5MM-2 | JP1, JP3 |
| 1 | CPOL-RADIAL-1000UF-25V | C2 | |
| 1 | 1X03 | JP2 | |
| 1 | CPOL-RADIAL-1000UF-63V | C1 | |
| 1 | H11AA1 | DIP6 | U$1 |
| 1 | PCB_DP_RECTANGLE-31X50 | DP5031_V1 | PCB1 |
Questions
How big is the ZeroCrossPower PCB?
It measures 50 × 31 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ZeroCrossPower use?
14 parts, built around the H11AA1. 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 ZeroCrossPower KiCad files?
From the UserHackable/ZeroCrossPower repository on GitHub, at the commit this page was made from: the board is KiCad/ZeroCrossPower/ZeroCrossPower.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the ZeroCrossPower design in my own project?
Its repository states no licence, so its author keeps all rights: ask UserHackable before reusing the design.
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