Circuit ATmega USBasp DIP AVR USB ISP/TPI programmer

ATmega USBasp DIP AVR USB ISP TPI programmer

Circuit ATmega USBasp DIP USB ISP/TPI programmer for Atmel AVR microcontroller. USBasp – USB ISP/TPI programmer for Atmel AVR microcontrollers, based on the design by Thomas Fischl. More information can be found at Windows users may need to install a driver. Of course, this is not necessary for linux and Mac users. Close SELFPROG and TGTPWR jumper when uploading firmware. If you are burning a fresh microcontroller, close the Slow Serial Clock jumper (SLOWCLK) since they are factory programmed for an internal 1MHz oscillator. This is not necessary if the improved firmware by nerdralph ( is used. Close Taget Power jumper (TGTPWR) to power the target device from the USBasp.

USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega88 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.

Schematic USBasp DIP AVR USB ISP TPI programmer

Schematic Atmega Usbasp Dip Avr Usb Isp Tpi Programmer

Features Circuit ATmega USBasp DIP AVR USB ISP/TPI programmer:

  • Works under multiple platforms. Linux, Mac OS X and Windows are tested.
  • No special controllers or smd components are needed.
  • Programming speed is up to 5kBytes/sec.
  • SCK option to support targets with low clock speed (< 1,5MHz).
  • Planned: serial interface to target (e.g. for debugging).


Bom Circuit ATmega USBasp DIP AVR USB ISP/TPI programmer

Name Designator Footprint Quantity
Resistors 1/4W
10k R1 Brown, black, orange, gold 1
1k R2,R3 Brown, black, red, gold 2
68R R4, R5 Blue, gray, black, gold 1
2k2 R6 Red, red, red, gold 1
100n C1 Ceramic capacitor 1
100u C2 Electrolytic capacitor 1
22p C4,C3 Ceramic capacitor 2
3V6 D1,D2 Zener diode 2
ATMEGA8A-PU U1 DIP28 – Microcontroller 1
BUSY LED1 Led 3 mm red 1
USB LED2 Led 3 mm green 1
USB-B-Female USB USB-M-49 – USB connector type B 1
12MHz XTAL1 HC-49S – Crystal 1
PROG ICSP HDR-IDC-2.54-2X3P – ICSP connector 1

Download files, PCB in PDF, Gerber, PNG




Case 3D

Buy AVR USB ASP in AliExpress

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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

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