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223 Capacitor

his tutorial is for making simplest FM transmitter using one transistor. VC1 is a small, screw-adjustable, trimmer capacitor and its rating should be around 10-100pF. Set your FM receiver for a clear, blank station. Then, with a non-conductive tool, adjust the capacitor for the clearest reception, rotate it till the receiver receives a sound from the microphone of transmitter. Use the following formula for determining the frequency.
ou need following components for this experiment:
ransistor- 2N3904
. Capacitors- 4.7pF, 20pF, 0.001uF, 22nF.
0.001uF has code 102 and 22nF has code 223.
or VC1 you can use a trimmer capacitor that looks like this:

Source: Question vs Answer

LCDalternatives Repair Kit, Acer X223W, LCD Monitor, Capacitors Only, Not the Entire Board
CE (LCDalternatives)
  • This repair kit contains 5 Electrolytic capacitors. We only use Panasonic, Nichicon, or Rubycon capacitors.
  • The capacitors in this repair kit are for the board pictured in this listing.
  • 6 inches of .032 inch 60/40 solder are included in the kit.
  • Links to online instructions will be included with the kit.

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2010-11-28 05:01:17 by sciencegy

I am trying to set up a simple circuit using a 555 Timer integrated chip to send out a single pulse for 1 second. To test the circuit, I am using an LED. Rather than blink for 1 second and go off, it stay on.
The circuit was set up in monostable mode using the manufacturer's data sheet at A 1000 Ohm resistor and a 1000 microfarad capacitor were used...th the other end to a common ground. There was no detectable difference)
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THE QUESTION: Why is the output staying on, and how do I make it give one 1 sec pulse, turn off, and stay off?
Thanks for any solutions you may have. :)

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  • Avatar musicfreek13579455 How do i know which side of ceramic capacitor is positive?
    Aug 11, 2007 by musicfreek13579455 | Posted in Engineering

    I have 2p& (C5), 3n3 332 (C4), 10n 103 (C3), 22n 223 (C2), and 22p (C6) ceramic capacitors for an FM transmitter. How do i tell which sides are positive/negative? There are no markings on them. Both leads are the same length. The only markings are the label of the capacitor and there are some with black on the tips of the capacitor. Does it matter if I place them turned the opposite way? Thanks.

    • No, it does not matter which way you place ceramic capacitors. These types of capacitors have no polarity. Generally, electrolytic capacitors (mainly aluminum and tantalum) are the types associated with polarized capacito …will usually have a "+" sign on the sleeving, or a stripe with "-" signs on the sleeving, indicating its polarity. So basically, no, you're fine putting the ceramics in the circuit in either direction.