Servos, mounting brackets, extension cables, Y cables and reversers and parts to make working with servos easier.
May not be exactly as pictured. Penny for comparison, not included.
Miniature Servo (SG90) Subminiature 9g servo. These have plenty of power for hinged point turnouts and smaller rail (code 55 and smaller) solid point turnouts - when used with the servo mounting kit (SMK002 below) then it can handle higher loads, up to code 100 non-hinged rail. If the point rails are hinged then the rail size is not an issue - it has been used up to G scale. Our servo brackets (see below) are custom made to fit these servos. 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.
SRV002 $4.50 USD
Note -if you want to buy large quantities of servos you may want to
look on Ebay for SG90 servos and buy them direct from Taiwan. Shipping
time is 3-4 weeks but you can get them for less then my price. I can
recommend seller top_racing2007. The brand called Tower-Pro will also fit although I find them to be a little noisier.
Miniature Servo Mount Kit Mark II New version - has more flexible mounting with the same footprint and ease of installation. This kit is the result of many hours of experimentation in to the best way to mount a servo for the best operation. The fulcrum arrangement gives a mechanical advantage to the servo that reduces the operating current, makes alignment simpler and allows for moving even solid point turnouts reliably. The bracket fits the miniature servo sold here as well as most other 9g servos including ESky-2 and HiTec HS-55's. The kit contains everything you need to mount a servo including the bracket, mounting screws, .032" wire and instructions. The new version no longer requires cutting off the servo ear and uses a screw to hold the servo in place. Made by Motrak Models.
SMK002 $3.00 USD
Foam Tape Squares
Set of ten (10) 1" x 1" x 1/32" double-sticky foam tape squares. Use as replacements for the foam squares that come with the servo brackets or for some other use around your railroad. Comes as 2 strips of 5 squares with the backing pre-cut (see photo).
DST001 (set of 10) $2.95 USD
Music Wire .032" Regular Duty
Set of five (5) 4" pieces of steel music wire (spring wire). Remains springy after repeated uses. This is the same wire as used in the servo mounting bracket kit above. This wire is thick enough to drive solid-point turnouts and can be bent using a pair of pliers. Can be cut with a good pair of diagonal cutters - do NOT use your track-cutters or bargain bin diagonal cutters.
SMW001 (set of 5) $2.95 USD
Music Wire .047" Heavy Duty
Set of five (5) 4" pieces of steel music wire (spring wire). This is a heavier duty version. It about as thick as it can be and still fit in the servo horns. Use where you want only a little give in your drive. Can be bent using a pair of pliers and strong hands or use a vise. Can be cut with a good pair of large diagonal cutters - do NOT use your track-cutters or bargain bin diagonal cutters. You could also cut it with a cut-off wheel in a moto-tool.
SMW002 (set of 5) $3.25 USD
Small Screws for Servos
Set of 3 sizes of hard to find small screws useful for mounting servos and servo horns. You get 10 each of #2x5/16" (matches hole in servo bracket kit), #1 x 7/32" and #0 x 1/8" (for securing servo horns of miniature servos). All are pan-head Phillips drive with self-tapping threads suitable for the resin and nylon used in our brackets and servos. You don't technically need these if you buy the servo and servo mounting kit above as they come with the screws needed but if you are like me, you find that those little screws have an amazing ability to roll on to the floor, never to be found again. This kit may save you a lot of time getting replacements.
SCR001 (set of 30) $5.00 USD
Standard Size Servo
We recommend Hitec HS-311 servos as the best value for the money in a standard size. They are tough, powerful and inexpensive. We no longer carry them but there are several good sources of these on the web. A standard size servo might be better for an animation project. However, for turnouts, the miniatures plus mounting kit have plenty of power.
(servo not included)
L-Bracket Mounting Kit for 4 Servos
This is a set L-brackets that make a snap of mounting servos to the underside of subroadbed. These will fir both the stndard servos and the miniatures that we sell. They are just the thing for semaphore installation. The L-brackets have a tapped hole that accepts a 4-40 machine screw (included) and the other hole fits a #4 screw (not included but you can use the ones that came with the servo). The kit comes eight L-brackets and eight 4-40x5/16" screws, enough to mount 4 servos. The image illustrates how to mount them to a standard servo (servo not included in kit). LBR001 (set of 8) $3.00 USD
12" (30cm) Servo Extension Cable
3-wire servo extension cable 12" (30cm) long, 24 AWG stranded wire. Added to the 12" cord that comes with most standard size servos you can power a switch up to 2 feet from an Octopus or Quad Servo board.
SRX012 $1.25 USD
Set of 10 12" (30cm) Servo Extension Cable
Set of 10 of the above 12" (30cm) extension cables.
SRX112 $10.00 USD
40" (100cm) Servo Extension Cable
3-wire servo extension cable 40" (100cm) long, 24 AWG stranded wire. Added to the 12" cord that comes with most standard size servos you can power a switch up to 4 feet from an Octopus or Quad Servo board. How many of these can you daisy chain together? In an experiment I daisy-chained 15 extensions and found that the servo still worked OK. At 20 extensions, the servo threw but could not hold against back-pressure. So I would say up to 15 - that's 50 feet.
SRX040 $2.50 USD
Set of 10 40" (100cm) Servo Extension Cable
Set of 10 of the above 40" extension cable.
SRX140 $20.00 USD
12" Y-cord Y cables are used to attach two servos to one output. Both servos will move in the same manner at the same time. Could be used, for example, to control a crossover or a passing siding. Does not affect the servo power. The Y can can also be used with the fascia controllers for the Quad-Pic to provide two control points for one switch. Use one for a pair of servos and one for a controller at the same time and you can set up a passing siding with control points at both ends!
SRX003 $2.25 USD
Set of 4 Subminiature Snap Switches
Used to switch power to the frogs of a turnout. These snap switches can be mounted directly on the back of a servo so that the servo horn actuates it switching the rail which is connected to the frog as the points move (See the How-To section for a picture). Rated 3 Amps@125VAC. SSW001 (set of 4) $5.00 USD
In-Line Servo Reverser
You can often reverse your servo throw direction by turning it around or reversing the servo linkage. Sometimes there just isn't room under a turnout to do this. You can't reverse the servo direction by swapping wires since servos work by varying the pulse width and reversing the wires will just disconnect off the servo. In cases where you want to reverse the servo rotation direction, this servo reverser comes in handy. If you put this in line with the servo it will swap the two ends about the center. [It works by mirroring the pulse around 1.5 ms which is the center on a servo. I.e. if a 2 ms pulse is input, the reverser will output 1 ms and if a 1 ms pulse is input it will output a 2ms pulse.]
