Web Site: www.parallax.com Office: (916) 624-8333 Forums: forums.parallax.com Fax: (916) 624-8003 Sales: sales parallax.com Sales: (888) 512-1024 Technical: support parallax.com Tech Support: (888) 997-8267 Parallax Standard Servo ( 900-00005) The Parallax Standard Servo provides 180 range of motion and position control to your project. Great for animatronics and robotics applications. Features Holds any position between 0 and 180 degrees 38 oz-in torque at 6 VDC Accepts four mounting screws Easy to interface with any Parallax microcontroller or PWM-capable device Simple to control with the PULSOUT command in PBASIC High-precision gear made of POM (polyacetal) resin makes for smooth operation with no backlash Weighs only 1.55 oz (44 g) Key Specifications Power requirements: 4 to 6 VDC* Maximum current draw is 140 +/- 50 mA at 6 VDC when operating in no load conditions, 15 mA when in static state Communication: Pulse-width modulation, 0.752.25 ms high pulse, 20 ms intervals Dimensions approx 2.2 x 0.8 x 1.6 in (5.58 x 1.9 x 40.6 cm) excluding servo horn Operating temperature range: 14 to 122 F (-10 to +50 C) *Power Requirement Notes The manufacturer specifies 4-6 VDC for this servo. However, we find that this servo is tolerant of a 9 V battery for very brief periods of time when there is no load, as used in some activities in the Stamps in Class series of tutorials. (Slight jittering may be observed when batteries are fresh this does not cause damage). Do not use this servo with an unregulated wall-mount supply, or a regulated wall mount supply exceeding 6 VDC. Servo current draw can spike while under load. Be sure that your application s power supply and voltage regulator is prepared to supply adequate current for all servos used. Do not try to power this servo directly from a BASIC Stamp module s or any microcontrollers Vdd or Vin pins do not connect the servo s Vss line directly to the BASIC Stamp module s or any microcontrollers Vss pin. Copyright Parallax Inc. Parallax Standard Servo ( 900-00005) v2.2 10/24/2011 Page 1 of 5 Quick-Start Circuit Vservo V V = microcontroller voltage supply Vdd Vservo = 4 to 6 VDC, regulated or battery White I/O Red I/O = PWM TTL or CMOS output signal from microcontroller: 3.3 to 5 V, not to Black Vss exceed Vservo + 0.2 V Microcontroller Standard Servo GND Specifications Pin Name Description Minimum Typical Maximum Units 1 (White) Signal Input TTL or CMOS 3.3 5.0 Vservo + 0.2 V 2 (Red) Vservo Power Supply 4.0 5.0 6.0 V 3 (Black) Vss Ground 0 V Power Precautions Do not use this servo with an unregulated wall-mount supply. Such power supplies may deliver variable voltage far above the stated voltage. Do not power this servo through the BASIC Stamp Module s Vdd pin. Servo current draw can spike while under peak load be sure your application s regulator is prepared to supply adequate current for all servos used in combination. Some Stamps in Class tutorials, such as What s a Microcontroller instruct the user to briefly power these servos with a 9 V battery when using a HomeWork Board and no load this does not cause damage. Board of Education Jumper Connection 15 14 Vd d 13 12 When connecting the servo to the Board of Education Rev Cs servo header, be sure the jumper is set to Vdd (regulated 5 VDC for this board) as shown Red Black in the figure below. Failure to place the jumper at this setting can cause X4 X5 damage your servo. Vin Using a Separate Power Supply on a HomeWork Board The BASIC Stamp HomeWork Board uses a 9 V battery for a power supply. A servo can drain a fresh 9 V battery in under 20 minutes Follow these directions to build two servo ports on the breadboard, and power them with a separate battery pack. Hardware Required (1) BASIC Stamp HomeWork Board (serial 555-28158 or USB 555-28188) (1) Battery pack with tinned leads (Parallax 753-00001) (2) Parallax standard servos ( 900-00005) (2) 3-pin male-male headers (Parallax 451-00303) (4) Jumper wires (10-pack: Parallax 800-00016) (4) 1.5 V AA batteries Copyright Parallax Inc. Parallax Standard Servo ( 900-00005) v2.2 10/24/2011 Page 2 of 5