Check the listing for details. Voltage Regulator for model train controller AC : Input 12-24VAC output 9VDC. Condition: New. Listed at 6.00 USD. Voltage Regulator Power Supply Module LM7809 for Model train AC terminal Input 12-24V Output 9VDC Max 1.2 amp This LM 7809 module is used to convert the voltage output from the accessories AC voltage terminal present on most conventional model train controllers. This AC (alternating current) voltage usually ranges between 15-20 constant Volts AC . The Regulator module converts the voltage to a stable 9 Volt Direct Current (DC) output which is used to power accessory item such as LED lighting, Signals, Turnout Spurs switches, circuit boards, RR Crossing bells etc. Used in conjunction with a power distribution hub many accessories can be operated. (see our store) Input can be up to 24 Volts AC or DC with output of a stable 9 Volts Direct Current (DC). The maximum output is 1.2 Amps. Buy it Now $6 with Shipping via USPS of $4.80 (USPS Ground Advantage)