Variable Regulator Kit 0 - 30V / 1A

provides stabilized DC with variable control 1.5-30V. 1A. maximum
Includes rectified filter for ready connection to 24VAC
power supply 30V
box for product FB06
PCB dimensions : 2.4" X 1.7"
Depending on the required output voltage, you can use a 12VAC transformer for voltages < 15VDC.
And for voltages > 15VDC, a 24VAC transformer is required.

NOTE** The transformer should be rated at slightly higher than your required current regardless of the voltage.