Usbasp
About the Usbasp PCB
Usbasp is an open source AVR/Arduino PCB design by agkaminski, published on GitHub. It is a 4-layer board measuring 14 × 50.8 mm, with 35 components from 20 distinct parts.
Its main chip is the ATmega8A-M, from the AVR/Arduino family. By type, the board carries 16 resistors, 5 diodes, 4 transistors, 3 connectors, 3 capacitors and 1 IC.
From the project
Various hardware projects that do not deserve their own repository.
My realization of the famous usbasp. Enhanced with logic level shifters to allow wide range of targed Vdd's.
Main components on the Usbasp
Usbasp bill of materials (BOM)
35 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATmega8A-M | QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm | U2 |
| 4 | BS170F | SOT-23 | Q1, Q2, Q3, Q4 |
| 1 | 12M | Crystal_HC49-U_Vertical | Y1 |
| 1 | AVR-ISP-6 | Edge6 | J1 |
| 1 | AVR-ISP-10 | Edge10 | J2 |
| 1 | USB_C_Receptacle_USB2.0_14P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
| 1 | Jumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | SW_DIP_x02 | SW_DIP_SPSTx02_Slide_9.78x7.26mm_W7.62mm_P2.54mm | SW1 |
| 1 | LL4148 | D_MiniMELF | D1 |
| 1 | Green | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | Red | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 2 | 3V6 | D_MiniMELF | D4, D5 |
| 2 | 22p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 1 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 8 | 4K7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 2 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 2 | 1K5 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13 |
| 2 | 66R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14, R15 |
| 1 | 2K2 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16 |
Usbasp design files
The KiCad project lives in the agkaminski/hw_projects repository on GitHub; these links point at the commit this page was built from.
- Layoutusbasp/kicad/usbasp.kicad_pcb
- Schematicusbasp/kicad/usbasp.kicad_sch
Usbasp: common questions
What microcontroller does the Usbasp use?
The Usbasp is built around the ATmega8A-M, from the AVR/Arduino family.
How big is the Usbasp PCB?
The Usbasp measures 14 × 50.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Usbasp?
35 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Usbasp design files?
From the agkaminski/hw_projects repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Usbasp design in my own project?
The repository has no license, so all rights stay with agkaminski. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Usbasp 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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