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 Li-ion Boe-Bot Power Pack-Charger ( 28988) The Li-ion Boe-Bot Power Pack-Charger is an integrated battery, power supply, and charging system designed specifically for the Boe-Bot robot. It is designed to replace the 4-cell AA battery pack that comes standard on the Boe-Bot. The Power Pack-Charger is powered by two 18650 Li-ion cells, providing approximately 7.4 VDC 2000 to 2600 mAh, depending on which cells you use. Parallaxs 28987 cells are rated at 2600 mAh, and have built-in protections against over-discharging or excessive current conditions. This charger/power pack will work with most protected and un-protected Li-ion 18650 cells. Features Fits into the Boe-Bots chassis, replacing the 4-cell AA battery pack Holds two rechargeable/replaceable 3.7 volt Li-ion 18650 cells Provides up to 6 hours of continuous motorized operation (depending on cell capacity) Rechargeable Li-ion cells dont need to be removed from your Boe-Bot for rechargingcharging circuitry is built into the board. Charge with a 7.5 VDC, 2.1 mm center-positive barrel jack wall transformer (Parallax part 750-00009, or equivalent). Automatic charge/discharge switching circuitry and on-board output fuse protection Multiple LED indicators provide charge readiness information for each individual cell status key for the LED indicators is printed on the board. Aggressive holders retain cells in any board orientation and in moderate shock environments, such as mobile robotic applications. Dedicated circuitry continuously monitors the charging process to ensure safety, efficiency, and to maximize the number of charge/discharge cycles of each cell. Key Specifications Charging Power Requirements: +512 VDC 1 A (min.) 2.1 mm center positive barrel jack supply ( 750-00009 works well) Power Output: Unregulated nominal 7.4 VDC 18002600 mAh (depending on cells used) Dimensions: 2.65 x 3.05 x 1.00 in (7.6 x 10.2 x 2.54 cm) Charging Time: 1 to 6 hours, depending upon the discharge level and capacity of the cells used Application Ideas Additional power for Boe-Bot accessories Extended run-time for your Boe-Bot Copyright Parallax Inc. Li-ion Boe-Bot Power Pack-Charger ( 28988) v1.0 10/31/2011 Page 1 of 9 Packing List (1) Li-ion Boe-Bot Power-Pack / Charger 2 Cell PCB, 2.63 in x 3.0 in (6.7 cm x 7.6 cm) (1) Li-ion Battery Cable ( 802-00020) (2) 2-amp fuses 1 pre-installed, 1 spare ( 452-00065) (3) Hex Aluminum F/M standoffs ( 713-00024) (3) 4-40 x pan head screws ( 700-00028) (3) 4-40 hex nuts ( 700-00003 Additional Items Required (2) Li-ion 18650-size cells ( 28987 or similar) +5 to +12 VDC power supply, center positive, + 2.1 mm barrel jack ( 750-00009 or equiv.) Safety glasses Small Phillips screwdriver Needle-nose pliers Multi-meter (VOM) Assembly Instructions CAUTION: Do not install the Li-ion cells until you reach the appropriate step. Step 1. Set the jumper on your Boe-Bots Board of Education to power the servo headers from Vdd. Setting the jumper so that the servos are powered from Vin will power the servo with the 7.4V input, which is above the 6.0V specification for the servos. Although extended testing in Parallax has not produced any failures at voltages less than 8 volts, this testing did not sample all prior servo manufacturing lots, so the potential for failure or damage at 7.4V has not been determined. 15 14 Vd d 13 12 Red Black X4 X5 Vin Copyright Parallax Inc. Li-ion Boe-Bot Power Pack-Charger ( 28988) v1.0 10/31/2011 Page 2 of 9