How to Install USBtinyISP Driver on Windows 10 64-bit
USBtinyISP is a simple and inexpensive AVR programmer that can be used to flash and read microcontrollers such as Arduino. However, installing the driver on Windows 10 64-bit can be tricky. Here are the steps to follow:
Download the Windows USBtinyISP signed driver built with libusb v1.12 from this link. This driver is compatible with the latest WinAVR[^1^]. If you have an older version of WinAVR, you may need to use the Windows USBtinyISP driver built with libusb v1.10 instead[^1^].
Run the installer and accept the license agreement. Select the USBtinyISP driver from the list of options and click Install.
Plug in your USBtinyISP device into an open USB slot. You should see a popup message that says \"Driver installed\".
Go to your Device Manager (Start Menu -> Settings -> Control Panel -> System -> Hardware) and look for the device under \"libusb-win32 devices\". It should be named \"USBtinyISP\".
You can now use your USBtinyISP device with AVRDUDE or AVRStudio to program your AVR microcontrollers.
If you are using Mac OS X or Linux, you do not need to install a driver[^2^]. For more information on how to use USBtinyISP, check out the user manual.
Sometimes, you may encounter some problems when using USBtinyISP. Here are some common issues and how to fix them:
If you get an error message that says \"avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)\" or \"avrdude: initialization failed, rc=-1\", it means that your USBtinyISP device is not recognized by your computer. This could be due to a faulty USB cable, a loose connection, a missing driver, or a wrong port number. Try the following solutions:
Check your USB cable and make sure it is not damaged or broken. Try using a different cable if possible.
Check your USB port and make sure it is not loose or dirty. Try plugging your device into a different port if possible.
Check your driver and make sure it is installed correctly. Follow the steps in the previous section to install or reinstall the driver.
Check your port number and make sure it matches the one in your avrdude command or AVRStudio settings. You can find the port number in your Device Manager under \"libusb-win32 devices\". It should be something like \"\\\\\\\\.\\\\libusb0-0001\".
If you get an error message that says \"avrdude: verification error; content mismatch\" or \"avrdude: error reading signature data for part \\\"ATmega328P\\\", rc=-2\", it means that your USBtinyISP device is not communicating properly with your target microcontroller. This could be due to a wrong wiring, a wrong chip type, a wrong clock speed, or a low power supply. Try the following solutions:
Check your wiring and make sure it is correct and secure. Follow the pinout diagram in the user manual to connect your device to your target microcontroller.
Check your chip type and make sure it matches the one in your avrdude command or AVRStudio settings. You can find the chip type on the label of your microcontroller or in its datasheet.
Check your clock speed and make sure it matches the one in your avrdude command or AVRStudio settings. You can find the clock speed on the label of your microcontroller or in its datasheet.
Check your power supply and make sure it is sufficient and stable. You can use the jumper on your device to power your target microcontroller from the USB port, but only if it requires 5V and less than 100mA[^1^]. If you need more power or a different voltage, you should remove the jumper and power your target microcontroller separately.
If none of these solutions work, you can try contacting Adafruit support or posting on their forums for more help. 061ffe29dd