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I am thinking to buy one of "ATTINY85 Development Board"...

Before buying I was checking details/Advantages of it.


First I thought this is just a breakout board & USB for power.

But, then found It can be programmed with "Digispark driver & board manager" directly by the USB.


I checked this Question: EBay “Development Programmer Board for ATtiny”

Someone said there:

"While limited, this type of board can be useful for "blink an LED on USB command" type tasks"


My Main question is:

Is it really programmable withut any TTL/ICSP/FTDI extention?

If so, is it possible to program other AVR chip (Attiny/Atmega) with simple codes directly via USB...?

(with same method)

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Is it really programmable withut any TTL/ICSP/FTDI extention?

Only if you use an ATTiny chip that has the "Micronucleus" bootloader already installed.

If so, is it possible to program other AVR chip (Attiny/Atmega) with simple codes directly via USB...?

Some can, but most need a bootloader installing. The ATMega32U4, for example, has a "DFU" mode, which is essentially a bootloader in ROM, that you can use directly over USB. In general, though, the answer is "Not without installing an appropriate bootloader with some hardware programmer first".

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  • Thanks... Now it makes sense... Because most of the tutorials doesn't told about "bootloader" part, maybe the soldered MC already has it... At last found a video with best review & tutorial YT link – BLUE Jun 4 at 14:37

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