2 layers71.1 × 54.6 mm
Mouse jiggler
barrettotte/mech-mouse-jiggler
A very impractical and stupid mouse jiggler using a crank mechanism, 12V DC motor, and a PWM circuit.
19 parts1MIT
2 layers86.4 × 70.5 mm
Adjustable Load v1.1
kholia/Adjustable-Load-v1.18Easy + Cost-Effective Variable Electronic Load.
- Size
- 86.4 × 70.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 15
- Pads
- 77
- Tracks, vias
- 86, 2
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 6 Jun 2021
- Updated
- 25 Feb 2022
Overview
Adjustable Load v1.1 is an open-source printed circuit board by kholia, from the kholia/Adjustable-Load-v1.1 repository on GitHub. It is a 2-layer board of 86.4 × 70.5 mm with 20 parts on 15 nets, routed with 86 tracks and 2 vias.
It is built around the TC4420CPA and IRFZ44NPBF. Its parts include 5 resistors, 3 ICs, 2 capacitors, 1 transistor and 1 fuse. It belongs with the power boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdVariable Electronic Load
This variable electronic load helps with testing power supplies, and batteries.
Motivation: RIGOL DC Electronic Load-DL3021 costs ~50k - this project costs nothing in comparison, and does the job in typical amateur radio contexts just fine.
Rating: 20A @ 30V depending upon the heatsink.
Testing notes (Dhiru): I have tested my build up to 5A @ around 20v.
This is an improved version of https://www.instructables.com/DIY-Adjustable-Constant-Load-Current-Power/. All
credit goes to GreatScott for coming up with this project.
Note: The 3D renderings are only published to help with the manual layout work on Zero-PCBs. All screenshots are clickable and zoomable.
See Adjustable-Load-v1.1.pdf for details.
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | Screw_Terminal | footprints:TerminalBlock_bornier-2_P5.08mm | TB_5V1, TB_VCC1 |
| 1 | 10 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1 |
| 1 | 10A Fuse | footprints:BLX-A | F1 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2 |
| 1 | 150k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R4 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R5 |
| 1 | 22uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2 |
| 1 | 2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3 |
| 1 | 470uF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C3 |
| 1 | Arduino_Nano | footprints:arduino_nano | A1 |
| 1 | CURRENT-SENSOR-ACS712 | diy-modules:CURRENT-SENSOR-ACS712 | M1 |
| 1 | I2C-LCD-16X2 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | U4 |
| 1 | IRFZ44NPBF | TerminalBlock:TerminalBlock_bornier-3_P5.08mm | Q1 |
| 1 | Rotary_Encoder | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | U3 |
| 1 | TC4420CPA | footprints:DIP254P762X533-8 | U2 |
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Questions
How big is the Adjustable Load v1.1 PCB?
It measures 86.4 × 70.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Adjustable Load v1.1 use?
20 parts, built around the TC4420CPA and IRFZ44NPBF. 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 Adjustable Load v1.1 KiCad files?
From the kholia/Adjustable-Load-v1.1 repository on GitHub, at the commit this page was made from: the board is Adjustable-Load-v1.1.kicad_pcb and its schematic Adjustable-Load-v1.1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Adjustable Load v1.1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask kholia before reusing the design.