Use to operate semaphores (with 2 or 3 positions and up to 2 arms) and 3-way stub switches. Also use for regular turnouts if you like the versatile position programming and LED/switch hookups. Features a "bounce" semaphore arm function. Can use DCC to control or pushbuttons or both. Can drive indicator LEDs with builtin resistors.
Dual 3-Way Servo Accessory Decoder
This can drive two servos to 3 positions. Can be used with semaphores or with stub-turnouts or control 2 turnouts. You can use a signal system, 3 pushbuttons or a 3-way switch and/or DCC. The 3 positions are fully programmable with the 3 buttons on the board. The center position features anti-backlash to ensure that it is in the same position whether driven from the left or the right. You the DCC by "teaching" the address - no CV programming. Resistors are built-in to drive external indicator LEDs.
Miniature Servo (SG90) Subminiature 9g servo. These have plenty of power for hinged point turnouts and solid rail point turnouts. If the point rails are hinged then the rail size is not an issue - it has been used up to G scale, otherwise code 100 is max for non-hinged points . Size 1.25" wide (including mounting tabs) x 0.5" deep x 1.125" tall. Servo lead about 7". The label on the servo and the lead colors may vary between batches. Works with all of our boards. Every servo is tested before shipping.
Servo is shown for illustration purposes. Kit includes 8 L-brackets and 8 screws
L-bracket Mounting Kit
This is a nice way to mount servos for operating a semaphore blade. The kit works well for both miniature (SG90) and standard size servos. The kit includes (8) 3/8" L-brackets and (8) #4-40x1/4" screws for mounting four servos.
LBR001 $5.95 USD
How to mount your servos to operate a dual-bladed semaphore using the L-brackets. The view is from the bottom below the semaphore. The two actuating wires will come up through the hole to be attached to the servo arms.
Dual 3-way In Action
Here is a photo sequence showing the Dual 3-Way driving a 3-way stub switch. Thanks to Jason Reis for building the switch for me. The Hex Frog Jiucer would be the ideal way to power the 3 frogs.
Hre are some shots of the Dual 3-Way Servo Driver being used to drive a Tomar semaphore. The action is controlled by a Logic Rail Tech Signal Animator both of which can be purchased here.