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mark_blackburn's avatar
mark_blackburn
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2 years ago

Adaptor for USB Blaster II to USB Blaster header

We have a board designed for the original USB Blaster. The connector for the USB Blaster II is slightly larger. Is there an adaptor available that would allow us to connect the USB Blaster II into a ...
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_AK6DN_'s avatar
_AK6DN_
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Not sure what you mean by "slightly larger"?

Was your original board built with a 2mm spacing 2x5 header instead of a 2.54mm (100mil) spacing header (I have seen this)?

Both the original USB Blaster and the newer USB BlasterII use a standard 100mil spacing 2x5 header.

If it is shrouded, it must have the polarity notch in the correct orientation.

Unshrouded also works, just need to insure pin1 orientation of connectors align.

I have the data sheets all the way back to the ByteBlasterMV from 1999 and the ISP connector is always
listed as being a 2x5 100mil standard female connector that is 250mil wide by 700mil long.

Same dimensions for all the ByteBlasterXX and USBBlasterXX variations.

You may need to send a photo of what does not fit.

mark_blackburn's avatar
mark_blackburn
Icon for New Contributor rankNew Contributor
2 years ago

Here's a photo of the USB Blaster vs USB Blaster II connectors:

Here's a photo of the USB Blaster mated to our board. The shrouded connector just fits the USB Blaster connector. There's no room for the wider USB Blaster II connector: