METHOD AND APPARATUS FOR VALVE CONTROL

摘要

A valve control circuit in accordance with the invention comprises a direct current (DC) voltage source and a DC-DC step-up converter coupled with the DC voltage source. The circuit also comprises a programmable controller coupled with the DC-DC converter, a first valve control switch coupled with the DC source and the controller, and a first valve coupled with the first valve control switch. The circuit further comprises a valve-picking circuit coupled with the controller such that a current source of the valve-picking circuit is selectively coupled with the first valve control switch to open the first valve in response to electrical signals from the controller.