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Everything posted by GPG

  1. ~43.5mV, 23 gain Reference please Reference please Capable of doing so down to 5
  2. Previous post Gain of 23 The sensor is easily able to drive a 10K load. The amp is probably stuffed through shorting the outputs.
  3. In his original circuit, the output will be 6.6V It only goes to 7.6 volts in your modified design. There is nothing wrong with the original design that requires modification, and it provides much better common mde rejection since the gain from both inputs is equal.
  4. . http://www.dutchforce.com/~eforum/index.php?showtopic=1556
  5. http://www.uco.es/dptos/electro/electronica/documentos/ele2N3055-D.pdf If forced beta = 10 you have a good margin.
  6. Look at http://www.ee.washington.edu/stores/DataSheets/cd4000/74c244.pdf
  7. The 4053 is an analog bidirectional switch. Looking at the pinning of the 157 it is easy to make the assumption that it is too. The OP saying that he was trying to switch between 2 leds lead me to the possibility that he had made the same.
  8. http://www.electronicsforu.com/EFYLinux/circuit/jun2003/CI-2-DTMF.pdf http://assets.zarlink.com/AN/msan_108.pdf
  9. Presuming you are monitoring the cylinder head temp, you will need a thermocouple or RTD for these temperatures. Sparkplug mtg one here http://www.performancetrends.com/DatamiteTemperaturePictures.htm
  10. The 5V polarity. Resistor in series with base of pulse transitor. Diode across be of same
  11. The suffixes are package types. N is the plastic DIP type. Go to the manufacturers site for others.
  12. www.necel.com/cgi-bin/nesdis/dl_ docpdf.cgi?lang=E&litcode=U11450EJ1V0DS00 www.necel.com/micro/ods/eng/list/17K/UPD17072.html 2 minutes
  13. This might help: www.intersil.com/data/an/an9642.pdf
  14. It is a load of rubbish. While static charges of several KV can be picked up on an antenna, the current is so small that charging a deep cycle battery from such an arrangement is not possible.
  15. Another http://www.linear.com/prod/datasheet.html?datasheet=163 Google "cold junction compensation". You cannot expect accurate results from a thermocouple without taking this into account.
  16. The transformer probably has an internal fuse. Some transformers have the connection between the primary winding and the fuse on a unused pin, others require peeling off the outer layer of insulation to locate.
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