28231 Parallax

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 DHB-10 Dual H-Bridge 10 Amp Motor Controller ( 28231) The DHB-10 is an open-source, 10 amp dual H- bridge motor controller. It features an onboard multicore Propeller microcontroller to provide precise closed-loop or open-loop control for two individual motor channels. Ready to use, the DHB-10 comes preloaded with open source firmware designed for use with the Arlo robot platform: Functional Description Power Propeller P8X32A Reset AUX1 Input LED Microcontroller System Button AUX2 Input Prop Plug pads Motor Status LED Motor Status LED Encoder Header 1 Encoder Header 2 3 A Motor 1 3 A Motor 2 Header Terminal Header Terminal 10 A Motor 1 10 A Motor 2 Screw Terminals Screw Terminals Fan pads (do not use) Fuse 624 VDC VIN Screw Terminals Propeller P8X32A Microcontroller System The multicore Propeller P8X32A Microcontroller System includes a 64K EEPROM and 5 MHz oscillator. The Propeller microcontroller loads firmware and nonvolatile settings from the EEPROM, automatically detects PWM or serial inputs, and drives one or two motors. The firmware is capable of reading encoders and performing advanced closed-loops motor controls for precise navigation of robotics platforms. CH1 and CH2 Inputs The DHB-10 accepts serial and PWM inputs on CH1 and CH2. Note that the center R pin on these headers is not connected. AUX1 and AUX2 Inputs If AUX1 the AUX2 I/O pins are shorted on power up, the DHB-10 will return all control and communications settings to factory default, including those that have been saved to EEPROM. These inputs are not otherwise used by the original firmware. Note that the center R pin on these headers is not connected. See the Propeller I/O Pin Assignments and the open-source DHB-10 design files for more information about these pins, if desired. Encoder Headers The encoder headers are compatible with the Parallax 36-position Quadrature Encoder Set ( 29321) used with the Arlo Robot Platform System. Each encoder uses two 3-pin BRW (Black-Red-White) cables, and these connect to the headers marked BRW and GBY on the DHB-10 board. WARNING: Never plug a 3-pin encoder cable into the pins marked + - because doing so can permanently damage your encoder Copyright Parallax Inc. DHB-10 Motor Controller ( 28231) v1.0 4/26/2016 Page 2 of 7