Microchip Technology DM182015-2 User Manual

DS70654B-page 14

© 2011-2012 Microchip Technology Inc.

The board can be powered from any one of these sources:

• 2xAA onboard battery pack is available at the bottom of the PIC18 Wireless 

Development Board 

• USB port

• External 9-16V charger power supply through the standard coaxial power 

connector

• External 3.0-3.6V power source through test points TP301 and TP302

USB Port and external coaxial port power are stabilized by MCP1703, 250 mA, 3.3V, 
low quiescent current LDO regulator. The battery operated applications that do not 
require LDO can be disconnected by removing the JP301, Regulator Disconnect 
jumper.

2.1.8.1

CURRENT CONSUMPTION MEASUREMENT

ThePIC18 Wireless Development Board contains two jumpers, JP302 and JP303, to 
measure the current consumption of the kit. These jumpers can measure current 
consumption of the entire kit without disturbing it. 

Measuring  the operational current:

1.

Ensure that either JP302 or JP303, has one jumper connected to it. Only one 
jumper is required.

2.

Connect the current meter to the jumper that is empty. Because the jumpers are 
electrically parallel, it can be either JP302 or JP303.

3.

Set the current measure range of the current meter above 250 mA.

4.

Remove the jumper.

The 9V wall adapter is not included in the kit. A 9V wall adapter may be 
ordered from

 . The part number  of the 9V 

wall adapter is AC162039.

Some current meters set the measuring range automatically, which can 
cause interruptions in the power line while changing the range. If 
interruption in the power line occurs, use manual range settings.