SparkFun will be closed on Monday for Memorial Day (5/27). Orders placed after 2pm MT on Friday (5/24) will process and ship out on Tuesday (5/28).
Track My Order
Frequently Asked Questions
International Shipping Info
Mon-Fri, 9am to 12pm and
1pm to 5pm U.S. Mountain Time:
Chat With Us
March 28, 2013
about 5 years ago
Could you please specify the quiescient current at poiwer down?
about 6 years ago
I built a datalooger with a Stalker microcontroller (Seeduino) using a multiplexer (Muxshield 1) to read temperature sensor. When powered by usb cable, the reading of sensor and unused port of the mux is very stable. However, when I use a battery pack (7.2V) and the energy harvester above set at 3.6V, the signal becomes unstable... from port to port of the MUX1, there is a succession of high and low bit-voltages, which create significant output uncertainties. When I remove the energy harvester and use a 3.6V battery, the signal still stable. So my conclusion is that the energy harvester is responsible for this "electrical" noise.
I need a battery of higher voltage because we want to deploy the datalogger in remote and very cold region (need to keep a voltage of 2.2 V min at -40 degree C.
Is anyone have an idea on how removing this noise?
Thank you for your help/advices.
PS: I also tried the harvester using capacitors between the harvester and the microcontroller, but the problem still there.
No public wish lists :(
Forgot your password?
No account? Register one!