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March 13, 2009
News - Come Work for SparkFun!
about 9 months ago
Glassdoor is not kind to you guys.
News - Voltage Divider App for i…
about 10 years ago
Hope I don't offend anyone, it's just my opinion.
If you can't figure this out on your own, you probably don't need to mess with electronics. Neat idea for an app to learn programming on an iPhone but totally useless.
about 11 years ago
I thought there had to be a large resitor to help stabilize the power supply. Please see below from http://web2.murraystate.edu/andy.batts/ps/powersupply.htm
Power supplies in today's computers are known as SWITCHMODE or Switching Mode power supplies and require a load to continue to operate after being switched on (the term switching mode actually applies to the technique of A/C to D/C conversion and not to the power up action). This load is provided by a 10 watt, 10 ohm wire wound load resistor (sandbar - about $0.80 at Radio Shack) across the +5 volt supply. While many of the newer power supplies will Latch_On without a preload, you will find that adding the resistor will (1) increase the measured voltage on the 12 volt rail slightly and (2) help stabilize the voltage level in this rail by minimizing voltage drop when the powersupply is loaded with a charger.
Please let me know if this is incorrect or how to tell which supplies wouldn't require the resitor.
No public wish lists :(