Radiocrafts
Embedded Wireless Solutions
RC1xx0 / 2x00DK
2008 Radiocrafts AS RC1xx0 / 2x00DK Demonstration Kit version 3.0 User Manual (rev. 3.1)
Page 5 of 14
Power supply section
The board contains a voltage regulator. You can choose between applying a 4-10V
unregulated supply voltage at the DC jack (like the equipped battery eliminator), or the screw
terminal where a battery pack or some other supply can be connected. The on-board
regulator drops the voltage to 3.0V.
Input supply voltage range is 4 – 10 V. A series diode protects the circuit against wrong
polarity.
An ampere meter can be connected in order to measure the DC current drawn by the module.
Remove the jumper on connector P15 and connect the ampere meter between the two pins
as shown in the figure below.
Figure 2. Module current consumption measurement
As shown in the figure above there are also available connection points for setting the module
in OFF mode and for VDD monitoring, both optional connections for test purposes.
Note: The 100k pull-up resistor R2 will draw approximately 27 uA in OFF mode if not
removed. The pull-up resistor is used to keep the module in ON mode for normal use. In a
real application this pin could be controlled by a digital output, and (the pull-up) R2 could be
omitted, and hence the very low OFF mode current consumption could be achieved.
Remove jumper and connect
ampere meter at P15 to
measure current consumption
Short here to set module
in OFF mode
VDD output from module
available at P9 pin 5
