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Recent content by icydash

  1. I

    switch between wall and battery power

    What exactly does that do?
  2. I

    switch between wall and battery power

    Thanks for your reply. The diodes seems like a good solution. So when the wall power is plugged in, if it has a higher voltage than the battery, the wall will power the circuit. If the battery has a higher voltage (even when the wall power source is plugged in) the battery powers the circuit...
  3. I

    switch between wall and battery power

    I'm trying to make a (low voltage) circuit that runs off wall power when it's plugged in (a 9v DC power adapter), otherwise it runs off the attached 9v battery. I'm not sure how to make the circuit detect if it's plugged into the wall or not, though. Is there some IC that is commonly used for...
  4. I

    Do guitar pedals draw guitar signal when there is no amp connected at their output?

    So what is the end result? Would the guitar signal going to the amp just be less, or would it be distorted? What exactly would happen? If the signal to the amp would be diminished, by how much?
  5. I

    Do guitar pedals draw guitar signal when there is no amp connected at their output?

    Ok so this is kind of an odd question, but here it goes: I'm trying to do something like this: So basically, my guitar signal is being routed both into the input of a guitar pedal (in series with a few other guitar pedals), and it's also being routed to the amp. It's hard to explain the...
  6. I

    Stage lighting project design questions

    Hey everyone! So I'm trying to design a wireless lighting system for my band, where at the "control station" end I have matlab running code / outputting over UART to a Xbee, which transmits to the "receiving end." At the receiving end, I would like the Xbee to transmit the data to a...
  7. I

    choosing a microcontroller for my project...help!

    interesting and good to know. would i be better off using like zigbees? they seem pretty cheap and small and i don't need any special coding for them, correct?
  8. I

    choosing a microcontroller for my project...help!

    Hi! thanks for the reply! Yeah unfortunately 43mm (plus the amount of space i'd need for the antenna wire) would be too long. I want to have all the circuitry combined in the smallest possible space (if i can maybe 25mm by 25 mm). What is manchester coding? and thanks for the heads up on the...
  9. I

    switching between two analog channels?

    well i mean i'd like to build it myself, it's more of a hobby type thing, but I will look into Remote Controlled Relays. I guess I could use infrared. As long as it can send a remote signal that doesn't interfere with anything in my guitar rig/PA system and go about 100 feet, I guess I can use...
  10. I

    choosing a microcontroller for my project...help!

    thanks for the quick reply! I have a few questions: So I'm looking at the modules on: http://robokitsworld.com/index.php?main_page=product_info&products_id=75 Up top in the main first picture of the modules, it seems like the transmitter is the shorter module on the left, and the receiver is...
  11. I

    switching between two analog channels?

    fantastic, I will look through all this when I get home from work tonight and try and draw up some schematics. Thanks so much!
  12. I

    choosing a microcontroller for my project...help!

    Hi! So I'm trying to design a circuit where on one end, if i hit a regular push button switch, it causes a wireless signal (maybe the word "turned on" if the switch is on, or "turned off" if the switch is off, using perhaps a zigbee?) to be sent to a wireless receiver on the other end. The...
  13. I

    switching between two analog channels?

    Hi! So I'm trying to design a circuit where on one end, if i hit a regular push button switch, it causes a wireless signal (maybe the word "turned on" if the switch is on, or "turned off" if the switch is off, using perhaps a zigbee?) to be sent to a wireless receiver on the other end. The...

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