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  1. C

    Making a battery

    Bigger plates equals bigger current.
  2. C

    Method to track shadow from light over a 5 cm sensor strip

    The problem you've got is the fact that a bright day at the beginning is the same as a dull day over half the sensor. That's why you can't use a single sensor. You need a "reference."
  3. C

    I need Cycle Timer circuit. 1 hour on 1 hour off and continues

    Drip water into a bucket on an axle and when it tips over, a rope will turn the eggs.
  4. C

    Method to track shadow from light over a 5 cm sensor strip

    The ones on ebay give 1mm They cost $1.00 for 20. I hope this is not too much for you.
  5. C

    Problem: Schmitt Trigger not giving ON/OFF output

    When we talk about HIGH and LOW output, we are actually saying "very close to rail voltage" and "very close to 0v." In most cases, anything above 70% is HIGH as most stages will accept (read) this as a HIGH.
  6. C

    audio amplifier

    Here it is: http://www.electro-tech-online.com/threads/an214q-amplifier-datasheet.16341/
  7. C

    audio amplifier

    Do you have the IC?
  8. C

    Volts to ohms for fuel sender

    No experimenting needed. You just create a table of 8 and divide the input voltage into 8 sections. Then fill and empty tank as see when the first LED comes on. Change the table value and start again. Continue until all 8 values are as required.
  9. C

    Volts to ohms for fuel sender

    You just need an 8 pin PIC12F675 and a bar-graph driver
  10. C

    HELP! Wireless Keyfinder Project

    A key finder project is much more complex than you think. You can buy it on eBay for $10.00. Look at it. It is very complex. It has taken $1,000 to design. And the work of 3 brilliant electronics engineers and 3 months work. I would not even start to design something as complex as this.
  11. C

    Volts to ohms for fuel sender

    You just need an 8 pin PIC12F675
  12. C

    Measuring current consumption on a PCB circuit

    Firstly you have to tell us if the current you want to measure is less than 1 amp or more than 1 amp.
  13. C

    Low Cost PCB Manufacturers

    I had 49 panels done last year. The work was perfect. All the holes were in the wrong place and the overlay was on the wrong side. I just got out a drill and re-drilled all the holes and screened the other side.
  14. C

    Simple question

    Just put a schottky and silicon diode in series.
  15. C

    Looking for specific SMT LED

    It will be what is called a HOUSE LED. Made just for the Toyota company.
  16. C

    SMT Manufacturing Line costing sheet

    My PCB manufacturer charges one cent per SMD for fixing plus about one cent per item for resistors and caps and the larger parts according to Chinese prices. It's cheaper than getting the soldering iron out yourself.
  17. C

    help with a basic 5 LED circuit

    I would not really call it a relaxation oscillator because this term just refers to the circuit changing from one state to another. It is much more complex than that. Firstly the circuit has a transformer and it works on flyback to produce about 30v. This voltage is clipped at 7v to illuminate...
  18. C

    help with a basic 5 LED circuit

    " but the problem we are considering is how to make the red and yellow LEDs flicker like a lit candle." If you could understand how a circuit works, you could see that it does that.
  19. C

    eMOSFET and common emitter amplifier

    No-one has explained WHY? or what is wrong. Every-one is too intent on using simulation software because they don't know how to design a circuit. Here is the major flaw. In the first transistor example the base bias resistors put about 2v2 on the base and this will put 2v2 - 0.6v = 1v6 on the...
  20. C

    Making A Drone With Phone Vibrators

    You can buy a quad on eBay or Alibaba for $20.00
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