Search found 2 matches

by djburke
Mon Oct 20, 2014 1:58 pm
Forum: Hardware
Topic: Connecting the LM4889 audio amplifier toa SparkFun MP3 shiel
Replies: 1
Views: 4198

Connecting the LM4889 audio amplifier toa SparkFun MP3 shiel

I'd like to use the LM4889 amp I just bought to allow a speaker to be connected to my SparkFun MP3 shield . The MP3 shield has - L and R contacts, so my thought is to connect (listing shield first then amp) one of L or R to AIN and - to G. However, there's a failry sizable warning on the tutorial pa...
by djburke
Sat Dec 07, 2013 9:19 am
Forum: Sensors
Topic: Does the RHT02/DHT21 need a pull-up resistor?
Replies: 1
Views: 6076

Does the RHT02/DHT21 need a pull-up resistor?

Perhaps I haven't had enough coffee this morning, but it isn't obvious to me if the RHT02/DHT21 temperature/humidity sensor needs a pull-up resistor or not. It seems to work with one (I'm using 10K, based on the Lady Ada tutorial) but was hoping that it had one built in.

Thanks in advance, Doug