2 layers99.3 × 98.6 mm
FlexiblePS
profdc9/FlexibleCharger
An Arduino-controlled charger for different kinds of batteries, or it can be a standalone power supply
118 parts13
2 layers
ClassD
Rodolfo855/PreAmpStage- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 21
- Pads
- 130
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Nov 2026
- Updated
- 5 Nov 2026
Overview
ClassD is an open-source printed circuit board by Rodolfo855, from the Rodolfo855/PreAmpStage repository on GitHub. It is a 2-layer board with 41 parts on 21 nets.
It is built around the LM358 and TL494. Its parts include 11 resistors, 9 capacitors, 3 ICs and 3 connectors.
Main components
2Parts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | R_Small_US | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, R12 |
| 8 | TestPoint | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | R_Potentiometer_Trim_US | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2, RV3 |
| 2 | C_Small | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C7, C8 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C9 |
| 1 | 10nF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C3 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C10 |
| 1 | 1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2 |
| 1 | C_Polarized_Small | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | C_Small | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C4 |
| 1 | C_Small_US | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2 |
| 1 | Conn_01x02_Pin | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | Conn_01x03 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J3 |
| 1 | L78L09_TO92 | Package_TO_SOT_THT:TO-92_Inline_Wide | U1 |
| 1 | LM358 | Package_DIP:DIP-8_W7.62mm_Socket | U2 |
| 1 | TL494 | Package_DIP:DIP-18_W7.62mm_Socket | U3 |
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Questions
What parts does the ClassD use?
41 parts, built around the LM358 and TL494. 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 ClassD KiCad files?
From the Rodolfo855/PreAmpStage repository on GitHub, at the commit this page was made from: the board is PreAmp/ClassD.kicad_pcb and its schematic PreAmp/ClassD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ClassD design in my own project?
Its repository states no licence, so its author keeps all rights: ask Rodolfo855 before reusing the design.