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  • basic sound detector

    posted byScottJ on 01/04/2013

    it works at digital on/off sound detector, and it's cheap. The 100K variable resistor is used to set threshold for 393 comparator chip. So the input sensitivity is adjustable. not amplified, so it's not very sensitive. At the greatest sensitivity,... Read more

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  • good value for IR proximity detector

    posted byScottJ on 01/03/2013

    pulses IR LED for best sensitivity to IR detector. Very nice design, simple to use. no documentation. you must experiment to figure out how to use. The circuit uses a 555 timer chip to pulse IR LED, which is detected by IR detector. Use 2K pot to... Read more

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  • Good Arduino Pro Mini

    posted byScottJ on 03/23/2012

    very small, works as Arduino 328P, using FTDI 3V serial cable. Includes single row headers, you must break and solder headers yourself. Some pins in non-standard location (A4, A5, A6, A7). Breakout connector does not fit FTDI or Sparkfun standard.... Read more

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  • works well

    posted byScottJ on 04/25/2010

    works we as ELM327 device. supports toyota camry 2002 (JP-1914?) and toyota avalon 2006 (CAN). very small, compact design. no led indicator, included software has virus (avast shows 'trojan-gen' in winsock dll). always draws power while connected... Read more

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