Specifications of 433MHz module for transmitting and receiving
wireless data
Special Attention:
Since the performance of voltage ascending slope that the radio frequency chip of this
module requires is too high when power supply is connected, something unwanted like PLL
locking tolerance which causes communication failure may happen when some LDO chips
of low adjustment rate are used or some bigger filter capacitors are exist in circuit. The
solution to this problem is to replace with another type of LDO of high adjustment rate and
arrange filter capacitors of bigger capacity at the input side of LDO and try not to arrange
big-capacity capacitors at the output side. You may also attach another circuit as shown in
the following figure. This circuit is applicable to all power supplies.
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2004-2008 Sure Electronics Inc.
GP-GC010_Ver1.0_page 6
