The circuit in this Design Idea bootstraps a large capacitor in series with the solenoid to provide a large actuation voltage (Figure 1). This higher voltage provides substantially more current to operate the solenoid (Figure 2, which is available at 100610dib), speeding the operation of the solenoid. You can also choose operating voltages or solenoid specifications that result in lower continuous current through the solenoid, reducingrndc power consumption and resulting in a cooler-running solenoid with better reliability.
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