Printing system with power regulation

1. A printing system comprising:

a printhead cartridge comprising a printhead;

a cradle unit for supporting the printhead cartridge; and

an interface at which the cradle unit is removably engageable with the printhead cartridge, the interface comprising printed circuit board with connections for connecting the printhead cartridge with a power supply which is remote from the interface, a power regulation circuit for regulating supply of power from the power supply to the printhead cartridge, and a print control circuitry of the cradle unit; wherein,

the print control circuitry is incorporated on a second printed circuit board, the first and second printed circuit boards having complementary connectors which cooperate to provide the connection of the printhead cartridge and print control circuit.

2. A printing system according to claim 1 , wherein the power regulation circuit is configured to regulate the supply of power from the power supply so that ink ejection nozzles of a printhead incorporated in the printhead cartridge receive substantially constant power.

3. A printing system according to claim 1 , wherein the first printed circuit board is arranged so as to substantially orthogonally project from the second printed circuit through the cooperation of the complementary connectors.

4. A printing system according to claim 3 , wherein the complementary connectors are arranged so that the first printed circuit board is able to pivot with respect to the second printed circuit board.