12.07.2015 Views

PICAXE Manual Section 1 - TechnoPujades - Free

PICAXE Manual Section 1 - TechnoPujades - Free

PICAXE Manual Section 1 - TechnoPujades - Free

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www.picaxe.co.uk<strong>Section</strong> 1 38GETTING STARTEDEnhanced Serial Download CircuitAbove viewxxxxx18022k10kBAT85serial outserial in0V<strong>PICAXE</strong>The BAT85 Shokkty diode operate at a lower device voltage than the internalmicrocontroller diodes, providing a more accurate voltage reference. Theadditional 180R resistor provides additional preventative short circuit and staticprotection on the serial output pin.Not required when the AXE027 USB cable is used.Download CablesThe USB download cable (AXE027) is recommended for all modern computers.It is compatible with any computer with a USB port.The standard serial download cable (part AXE026) consistsof a 3.5mm stereo plug, which mates with a stereo socket(part CON039) on the project board. This type ofconnection is more robust and reliable than the Molexheader in the educational environment.Individual hobbyists may prefer a standard 3 pin Molex0.1" (2.54 mm) 3 pin header. A matching cable (part AXE025) is available. Thiscable is not recommended for the educational environment.All serial computer connection is via the serial port (9 pin D connector).If youhave a very old computer with a 25pin serial port, you require a 25-9 pin adapter(part ADA010), which are also available from most high street computer stores.revolution(c) Revolution Education Ltd. Email: info@rev-ed.co.uk Web: www.rev-ed.co.ukVersion 6.9 07/2009All rights reserved.38

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