A man has admitted he damaged nine speed cameras across Adelaide but has told a court he cannot remember damaging 13 more.

Police allege Aaron Goods, 24, attacked speed cameras last November and December at places including Crafers West, Goodwood and Morphett Vale.

He has pleaded guilty in Adelaide Magistrates Court to nine charges of property damage relating to fixed cameras valued at up to $30,000.

Goods will contest another 13 counts of property damage because he cannot remember offending.

Police also have charged him with driving offences, a bail breach and with possessing a prohibited weapon.

It is alleged a crossbow was found at his home along with marbles police allege he might have planned firing at cameras.

The magistrate has suggested the parties discuss compensation over cameras damage ahead of another hearing in September.