Document code: EB011-30-1 Power board datasheet EB011-00-1 A

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Document code: EB011-30-1 Power board datasheet EB011-00-1 A

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E-blocksPower board
Document code: EB011-30-1
Power board datasheet EB011-00-1
About this document. General information. Power board layout. Testing this product Circuit description Appendix Circuit Diagram
Copyright Matrix Multimedia Limited 2005
page
E-blocksPower board
Document code: EB011-30-1
About this document
This document concerns Matrix Power Board code EB011 version order code this product EB011.
Trademarks copyright
PICmicro registered trademarks Arizona Microchip Inc. E-blocks trademark Matrix Multimedia Limited.
Other sources information
There various other documents sources that find useful:
Getting started with E-Blocks.pdf
This describes E-blocks system used develop complete systems learning electronics PICmicro programming.
Help file
This describes software functionality. software used transferring code PICmicro microcontroller.
assembly strategies
provided this product.
Disclaimer
information this document correct time going press. Matrix Multimedia reserves right change specifications from time time. This product development purposes only should used life-critical application.
Technical support
have problems operating this product then please refer troubleshooting section this document first. will find latest software updates, FAQs other information site: www.matrixmultimedia.com still have problems please email support@matrixmultimedia.co.uk.
Copyright Matrix Multimedia Limited 2005
page
E-blocksPower board
Document code: EB011-30-1
General information
This E-block allows high power demanding applications such running medium sized motors, relays many other applications. board allows processors E-Blocks range provide power demand that required these high power applications. board uses 4-channel industry standard power chips L293D. Each channel used individually forming up-to eight 600mA power output stages. channels grouped together form full H-Bridge configuration that allows bi-directional motor control thus enabling total power output H-Bridge 1200mA. On-Board re-settable fuses automatically trip when much current consumed protect these power chips. These rated trip 500mA order protect L293 chips. board E-Blocks compatible used with `up-stream' devices boost available output power processor.
Features
E-blocks compatible cost channels produces 600mA 36V) each full H-Bridge configuration outputs enabling 1200mA protection re-settable fuses
Block schematic
EB011-30-graphics.cdr
Copyright Matrix Multimedia Limited 2005
page
E-blocksPower board
Document code: EB011-30-1
Power board layout
EB011-74-1.cdr
9-way downstream D-type connector Power screw terminals L293D power chips External socket Re-settable Protection fuses Output Screw Terminal
Copyright Matrix Multimedia Limited 2005
page
E-blocksPower board
Document code: EB011-30-1
Testing this product
following program will test circuit. test file downloaded from www.matrixmultimedia.com. following instructions explain steps test your Power board. instructions assume that installed functional. also assumes that confident sending program Multiprogrammer. These programs requires aPICmicro Multiprogrammer board (EB-006) with 40-pin PIC16F877A device. program will enable fully test functionality board.
System Setup
Multi-programmer board with PIC16F877A 19.6608 crystal setting Loaded with "power.hex" firmware Power board connected Port Multiprogrammer Connect "+V" from Screw terminal Power board "+V" Multiprogrammer Connect external power supply jack (J4) labeled "Vpwr screw terminals labeled "Vpwr this taken directly from "+14" screw terminal Multiprogrammer 0.2A Lamp connected outputs board
Test Procedure
Once Multiprogrammer been programmed press reset button. This will restart program. program will turn each output individually then turn outputs together. This will allow outputs tested using lamps. restart sequence, press reset button Multiprogrammer. Please note that this program requires power supply approximately amperes. This used turning lamps Using power supply that rated this high power could cause program restart. Also note that power supply that Matrix Multimedia sells (HPPSU2) only rated Amperes therefore rated appropriately this test routine.
Copyright Matrix Multimedia Limited 2005
page
E-blocksPower board
Document code: EB011-30-1
Circuit description
full circuit made main components: Power chips (L293D) output screw terminals.
Power chips L293D
L293D industry standard push-pull channel drivers that deliver up-to 600mA channel. device accepts standard logic levels output drive inductive loads. board L293D chips that fitted sockets enable quick easy replacement these chips. chips powered from external supply volts). load power supply connected power Jack (J4) labeled "Vpwr screw terminals labeled "Vpwr". When Vpwr routed outputs L293 will find that output voltage around 1.5V less than Vpwr voltage drop across internal diodes. L293D chips also require supply logic side device. This provided directly from `up-stream' EBlocks board screw terminal labeled "+V" usually L293D provide individual channels. channels also grouped pairs provide full H-Bridge configuration that suitable bi-directional motor control. Each channel internally clamped with diodes (which makes them suitable driving inductive loads) also externally protected thermal re-settable fuses. These fuses will `trip' when current demand great chip. They will automatically reset themselves when fuse cools down. Please note that `up-stream' processor output supply also used drive L293D outputs. This done connecting `up-stream' processor voltage (i.e. from screw terminal OUT") both "+V" Vpwr" Power board screw terminals. doing this sure connect separate power supply Power jack (J4) bear mind voltage drop mentioned above. further information L293D please visit manufacturer's website www.st.com find datasheet this device.
3.3V operation
This board does operate 3.3V supply. must minimum
Output screw terminals
outputs from L293D chips taken directly output screw terminals. screw terminals labeled OUTPUT This represents data lines that control these outputs. example input D-type connector will control output L293 screw terminal labeled `2'.
Copyright Matrix Multimedia Limited 2005
page
Appendix Circuit diagram

Document code: EB011-30-1 Power board datasheet EB011-00-1 A

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