Wiring up the PicAxe - Power Supplies

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Hardware

General

'08 Ports

'18A Ports

Power
Supplies

Input &
Output

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serial
interface

   
 
Preliminary info...
This page currently incomplete...

Supply Requirements

A wide supply voltage range is possible (2 V min. to 5.5 V max.) and excessive voltage is liable to damage the chip and should be protected against if the supply voltage isn't otherwise controlled. Insufficient supply voltage (ie. below 2 V) will result in unreliable operation (as well as reduced output drive capacity and altered input voltage trip-points).

Power Supply Pins.

Chart of which pins on which chip are +V and 0V, and voltage range permitted.


Reverse-polarity protection

Providing protection from polarity reversal of supply should be considered and may be accomplished in several ways (eg reverse polarity protection diode, biased FET, fuse and shorting diode, zener limiter...).

Supply Decoupling

Supply decoupling odf at least one 0.1uF ceramic capacitor is highly recommended and the addition of a small electrolytic capacitor should be considered in some cases.

Battery Supplies


Regulated Supplies