Biohacker Meow-Ludo Disco Gamma Meow-Meow who was fined for implanting an Opal Card chip into his hand has had his conviction overturned.

Mr Meow-Meow, 33, pleaded guilty to using public transport without a valid ticket and for not producing a ticket to transport officers.

In March, he was fined $220 for breaching the Opal Card terms of use and was ordered to pay $1,000 in legal costs.

Mr Meow-Meow appealed against the conviction in the District Court and today it was quashed.

District court judge Dina Yehia took into account his good character, while describing the case as "highly unusual … involving a unique set of circumstances."

Meow-Ludo Disco Gamma Meow-Meow using his arm as an Opal Card. ( ABC News: Nick Dole )

She said that, while there were legal issues of general deterrence, she was of the view that the objective seriousness of the offence fell towards the lower end of the range, if not the bottom.

Judge Yehia said Mr Meow-Meow had not tampered with the Opal Card in order to avoid paying the fine.

She acknowledged he had no prior convictions so directed the conviction be set aside.

However, Judge Yehia upheld the court costs.

Outside court, Mr Meow-Meow said he was pleased with the outcome

He said he did not encourage anyone else to implant an Opal Card chip into their skin.

Mr Meow-Meow said he would not do it again without permission from Transport New South Wales.