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  1. Electro132

    How do you connect all the voltages together into one?

    Hi, I am currently studying how to add all the voltages together at the end of a circuit. For instance, i have a 9V power supply that's going into the entire circuit and have gathered 5V from the Darlington Pair, 5V from the op amp and an extra 6V from the capacitors. The problem i am having...
  2. Electro132

    Temperature In Household Electrical Line

    Hi, I was just thinking the other day about what the temperature is of the household electrical line. I tried looking it up on google but no one seems to have posted anything about it so i would just like to know how much temperature does the electrical line have in the average household? You...
  3. Electro132

    Can AC/DC be placed into a D Flip Flop?

    Hi, I was just experimenting whether AC/DC can be placed into a D Flip Flop? I was thinking that since AC is not direct can this be possible for the D flip flop to move from D Flip Flop 1 to D Flip Flop 2 and vice versa?
  4. Electro132

    555 IC not amplifying enough

    Hi, I am doing a combined circuit involving a 9v battery, a 555 IC oscillator (with timing input of 1K + 1 nF cap, 100K pot for pulse width modulation) and a charging / discharging circuit using a 2200 uF 25V cap with a 10 ohm resistor for charging and a 100 ohm for discharging. When i...
  5. Electro132

    Formulas for Voltage, Current and Resistors

    Hi, Its been a long while i've been on here since i was busy with my projects. However, I'm trying to understand this idea where the current input (I) is different to the voltage input (V). Because my multimeter is damaged from when i opened it up to repair it, i am pretty much using I = V /...
  6. Electro132

    Increasing Current

    Hi, I'm needing help in increasing current from a 1.5 V batt by placing down 3x 100 ohm resistors in parallel circuit with an output. However, i have encountered a problem and found that the resistors (even though they each have their own line) tend to give out about 0.3 A of current each but...
  7. Electro132

    How do I increase energy flowing into a Capacitor?

    Hi, I am trying to discharge energy to a 2200 uF -400V Capacitor. The transformer circuit i have is actually generating a total of 330 V output. However, when i connect the negative lead from the transformer circuit to the neg (-) of the Cap, it is only transferring small amounts at a time...
  8. Electro132

    How to get 80 mV?

    Hi, I want to know how to get 80 mV. I have applied a 1.5 v batt and placed a 10 ohm, 100 ohm and 220 ohm resistors on their own (in circuit with the battery) but got only 1.4 V using a multimeter on all of them. I usually thought getting a higher resistance would mean a lower voltage would...
  9. Electro132

    How do i connect a 5 pin transformer?

    Hi, I want to connect a 5 pin transformer to my circuit. It converts from 1.5 V to 330 V (or more) and has 5 pins - 2 pins input and 3 output. I would like to know where each of the pins connect to? I was thinking of just cancelling the middle pin but wanted to know what it was for since...
  10. Electro132

    What is does WV stand for in a capacitor?

    Hi, I had this flash camera which i opened up and found a 330 WV 80 uF electrolytic cap. Just wanted to know what does the 'WV' stand for and whether it is dangerous or not. Thanks
  11. Electro132

    Stereo jack help

    Hi, I need help on finding out where i can get these stereo headphone jacks from. I have tried looking online but couldn't find out where to get some. Can anyone recognise where i can get these? i think they have a full diamond back. Thanks
  12. Electro132

    Making waves into DC

    Hi, i'm trying out this experiment where waves are picked up and then turned into DC. I have drawn up a schematic and also tested the circuit. Using a multimeter i got 5.82 V at the tap. However, there might have been some mistake as i did place a -5v voltage regulator and would like someone...
  13. Electro132

    Calculating frequency

    Hi, I'd like to know how do i calculate the frequency for a LC tank? I've seen so many different formulas i lost my way and managed to get to Physics some how where the formula is V = C / (inverted Y symbol). I am interested on learning the basic way first as seeing the entire thing seems like...
  14. Electro132

    Regenerative Circuit

    Hi, Needing some help with both these circuits. (See attached) I have applied a 3v lithium ion batt and could not get the ends to work powering a simple green LED. Not sure why. However, when i checked on my laptop oscilloscope i am picking up on electrical signals. Any help given is...
  15. Electro132

    How to move up/down the frequency wavelength

    Hi, I am usually asking for help in my circuits but today, i would like to ask you all for help in understanding how to move up and down the frequency wavelength chart. I know that having an LC Tank circuit will define where i am on the chart and also with a tuner i can narrow down the...
  16. Electro132

    Audio or Video Transmitter

    Hi, I am building an audio and video transmitter. So far I have a 3 stage transmitter PCB circuit which consists of a common audio emitter, RF Oscillator and RF Amplifier. However, i still need to place a log somewhere to control the amount of voltage/current flow. I wasn't sure whether i...
  17. Electro132

    Building a simple radio scanner

    Hi, I would like to build a simple scanner which has a wide range of 10 000 hz to 30 000 khz or 10 000 khz to 30 000 mhz. Is there a simple circuit? I had a look and it seems like i could go with building a receiver based on these values but not sure how. Any help is appreciated. Thanks
  18. Electro132

    Finding out what frequency i am on

    Hi, I am seeking to know how i could go about getting a variable inductor into my LC tank circuit, as well as what components i will be needing. I have a 6 - 30 pf trimcap for variable tuning within an lc tank circuit but found out that i could also get the coil to be fixed or variable and...
  19. Electro132

    Storing energy in Capacitors

    Hi, I am trying to store energy from a 6v battery into a capacitor to run my leds. So far i have tried a 1000 uf 16v electrolyctic capacitor and it's ok (the lights on my circuit dim after i switch off the power source). But i want my circuit to have "longer lasting batteries" similar to...
  20. Electro132

    Arduino Script for sending text messages

    HI, I've got a nano atmega 328 arduino board and also a 2.4 ghz transmitter which i would like to use to send out a text message to my email address. So far i've ran some scripts for the blinking lights and changed the delay on it but i would like to see if it can transmit a text message to...
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