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  1. Electro132

    Command Script for Read/Write from USB Stick or SD Card

    Hi, Would like to know if anyone can give me links to scripts that allow Read / Write from USB Sticks and SD Cards? The purpose is that the script runs the image file from the USB Stick or SD Card and then gets sent to the transmitter. I already had a look on google and there doesn't...
  2. Electro132

    How to get a strong signal over a long distance

    Hi, Just wondering how can a single picture travel over long distances such as 1km and not lose its accuracy? i know it involves a large amount of voltage as low doses couldn't travel far. So in short what i know is that the distance a single image can travel is dependant on how much...
  3. Electro132

    What can i do with Quartz Crystals?

    Hi i found this part in my kits and want to know what i could do with it. It is a 25 mhz quartz crystal. (pics are provided) Any ideas? Could i use this in a circuit to produce waves, radar, telecommunications, etc.?
  4. Electro132

    Amplitude and Frequency

    Hi, Ok, so its been about 1 - 2 years i've been researching and have found what i was looking for. I need some help in designing and building it so here goes: I plan on building a project which allows me to change the amplitude and frequency of a waveform. This is then fed through an...
  5. Electro132

    Applying wave to voltages

    Hi, I have this project in my mind where the power/voltage supply is 1.2 V which is turned into - 70 mV using resistors in the "M' ohm range. The problem i am having now is how to add it to the IC and combine it with the wave pattern. I know that a NAND will work with a 555 but wanted...
  6. Electro132

    Need help with tuning cap

    HI, I have tried to google search for variable capacitor images that show the pin layout (input, common, output) but can't find any. Can anyone please help me? I have attached a pic and need to know what the pins stand for. Thanks
  7. Electro132

    Constant Battery charger

    HI, I have this idea which involves a battery being placed with transistors and resistors. My goal is simple, the amount taken out is to be amplified and used on a 2nd circuit while also having the resistors in place to put the amount of battery lost back into the battery.
  8. Electro132

    Pulsated LD

    Hi, ok, here we go. I want to build a pulsated LD with tone and volume adjustment logs (full circle motion) which will run on at least 3 V with an increase maximum current output through the use of Darlington pairs. Besides that, i'll need an IC chip that is capable of having data...
  9. Electro132

    Convert V to mV

    Hi Guys, Thanks for the help in the past. Things with the other projects are going fine. I have a new project and it has to do with converting V into mV. I was thinking of having an input of 9V and converting it to an output of 80 mV. Can anyone help? This is hard to do. Thanks
  10. Electro132

    Laser diode driver circuit

    Hi, Trying to make a Laser Diode Driver circuit. Can you help? I have the LM317, 2x 10 ohm resistors, 1n4001 diode, 10 uf 16 v cap and 100 ohm variable resistor. I have attached a pic of the PCB i've been working on. Thanks
  11. Electro132

    Laser Driver Circuit

    Hi, I need some help with designing a laser driver circuit. I found a red diode that could probably take 5 - 9 v easily but saw from other posts online that i would need a heat sink if i wanted to apply more power. Needing help to create the driver circuit. Thanks
  12. Electro132

    Thyristor diagrams in wrong place or not?

    HI, I need some help deciphering this circuit on how it works and whether the components are in the correct place. It's from this website: http://www.doityourselfgadgets.com/p/coilgun-knowledgebase.html I found out that the thyristor they placed has G (far right) in the negative...
  13. Electro132

    How do you increase IR LED range?

    Hi, I'm trying to find out how to increase the range on an IR LED. I know some methods like - adding more LED's; - increasing the voltage input (i.e. instead of using a 5v batt you use a 12 v); - adding transistors to amplify the existing voltage input into its base (i.e. using a 5v...
  14. Electro132

    Creating Square or sawtooth waves

    Hi, I was just playing with a software program that generates different tones (sine, square & sawtooth) and had a think about how these waves are created with components in a circuit especially if there was a wide range in hz and an amplification of 0 -1. So i'll take a guess at this: i...
  15. Electro132

    Simple Amplifier

    Hi, I want to build an amplifier but i'm not sure how to so i need some guidance in this. I've attached what i started with. It's going to connect onto 2 different circuits: one that runs on 3 v and the other on 9 volts. They both should have the trimpot turned fully on for maximum output...
  16. Electro132

    Can sound be delivered using light waves?

    Hi, Wondering if Sound (like music, voice) can be placed on light waves and be projected out as light waves not as sound waves?
  17. Electro132

    Few Questions about Sound on Light

    Hi, I need some help on my assignment involving the EMF spectrum and sound. It is also about creating vibration from sound using LED. I'm stuck with these questions: 1) Explain how sound can be used on LED. 2) Briefly describe how different Frequencies can be used to create sound. 3)...
  18. Electro132

    Old CRT cathode Tubes

    hi, Is it true that old tv CRT tubes use electrons to beam an image? If so, how can i put an IC with an image on it to be amplified and out through it? I mean if i amplify wouldn't that mean i'm imprinting it or making a mark like fire on wood?
  19. Electro132

    Resonance

    Hi, Could resonance be picked up by a receiver? and if so by what?
  20. Electro132

    GPS Transmitter

    HI, I always wanted to do this but put it off since i didn't have time due to work committments. Now that i do, i would like to know how to construct a GPS that can transmit a signal message back to the home router and through the internet. Or better yet, GPS transmits a Txt message to my...
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