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January 7, 2010
about 9 months ago
I just looked over the schematic and the resistors being used are pretty big (between 180k and 10Mohm). These are to help isolate the person from the circuit. However, it is VERY IMPORTANT to use a completely isolated circuit. In short, do not attach this in any way to anything plugged into a wall outlet. This must remain battery operated for safety reasons. If you need to get serial data from the MCU then you are stuck either doing it wireless or through USB/serial on a laptop that IS NOT plugged into a wall or Ethernet cable.
about a year ago
You should be able to do something like that using a force sensor like this and a 555-timer as shown here: http://www.zen22142.zen.co.uk/Circuits/Switching/debounce.htm
If you want to reduce component count and increase the number of sensors you can use then you could use an Arduino instead.
News - SparkFun Live!: Random Pi…
about 2 years ago
I would just like to take this time to say that your ear rings are awesome!
News - Final Soldering Competiti…
about 3 years ago
You guys did a great job with this contest. I look forward to doing this again next year and taking the trophy that rightfully belongs to me. (To the guys who did place though, you were incredible with not only soldering but assembly as well.)
about 4 years ago
I’m not an expert (yet) but I think the vibrations would generate unwanted voltages in the caps. Dave Jones from the EEVblog has a video about that with oscilloscope probes.
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