Datasheet

5
revolution
Revolution Education Ltd. Email: [e-mail] Web: www.rev-ed.co.uk Version 1.0 01/09
AXE091.PMD
AXE091 PICAXE DEVELOPMENT BOARD
The 9 way D connector socket is used for True (“T”) RS232 communication, not for
new program downloads.
Reset Switch:
The reset switches only reset PICAXE chips with an external reset pin (18/28/40).
To reset the 08/14/20 pin devices you must disconnect and reconnect the battery
(or power supply).
Power Supply:
There are two options on how to provide power to the Development board, but
ensure only one option is connected at any one time. The green PWR LED indicates
power to the board.
1. Battery - connect a 4.5V (3xAA cell, not supplied) battery box to the screw
terminals, ensuring correct polarity. Do not use 6 or 9V battery packs.
2. Power supply - connect a regulated 9V DC power supply with 2.1mm (positive
tip) connector (not supplied e.g. part PWR009A).
Do not use both power options at the same time!
The power supply connection is regulated to 5V by the 7805 regulator and reverse
polarity protected by a diode. The screw terminal battery connection is not
regulated and so connects directly to the PICAXE chip.
Do not use a 9V PP3 battery on this connection. Only use a 4.5V (not 6V) battery
+5V
Out
0V
+
1N4001
7805
regulator
100n
100u
9V
In
0V