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  1. (*steve*)

    Hello, can somebody help me with an240P

    You want to make an FM radio from a frying pan? Can you explain more clearly? I understand that English may not be your preferred language, but we really need to come to a common understanding.
  2. (*steve*)

    Hello, can somebody help me with an240P

    I suggest you blame @Audioguru In a previous thread he suggested that you build something extremely complex as an answer to your question regarding an explanation of how a relatively simple kit radio worked. If your aim is to learn how radio receivers work then you have been badly lead astray...
  3. (*steve*)

    Does someone here know what data a Chromecast delivers to the internet?

    Google PLEX. Install the server, get a (not free but cheap) app for your phone, and watch the content from your local server on your TV via the Chromecast device.
  4. (*steve*)

    Visible light

    Nothing.
  5. (*steve*)

    You know you're a valued customer when...

    Woo Hoo! and the 74HC259 fixed the problem.
  6. (*steve*)

    You know you're a valued customer when...

    Oooh, I found a package 70x125x680mm thrown at my front door. What could possibly be inside? Inside the box (which was courier delivered) is some paper, a very large anti-static bag, and a single tube of IC's. So Yep, they arrived by Friday. Not bad considering they came from the UK.
  7. (*steve*)

    In need of a great power supply

    No, the fifth option is reasonably commonly used. The only time the input voltage needs to switch is when you're changing the voltage or when the power supply is in current limiting mode. If you're using the power supply in current limited mode as a current source, and the voltage needs to...
  8. (*steve*)

    In need of a great power supply

    If you want a linear regulator which you can vary over a large voltage range and which has a high current output, a problem is likely to be power dissipation at low voltage. There are several options: Reduce the current capability at low voltages Have an enormous heatsink Reduction of the...
  9. (*steve*)

    Hello, Welcome! (Introduce yourself)

    Hello and welcome!
  10. (*steve*)

    Yusynth metaliser

    It would mean checking the output voltage for all modules. Make sure it doesn't exceed +/-12V. If the inputs (of the +/- 12V modules) are protected by some series resistance or blocking capacitors then the chance of damage will be reduced.
  11. (*steve*)

    Please Help!!! Need circuit board that can independently fire 22 leds.

    Assuming the outputs can be high, low, or high impedance, you should look at charlieplexing.
  12. (*steve*)

    For Sale: SignalHound BB60C Spectrum Analyzer

    I assume that price is for both as you can buy a single one (new in a sealed box) for $3k
  13. (*steve*)

    Timer circuit

    If you are generating a pulse-train (i.e. the 555 is wired up in an astable circuit) then this is a feature. You could try increasing the frequency and using a divider to divide the output by 256. This will cause the output to have a 50% duty cycle which may be a problem. I've seen this used...
  14. (*steve*)

    You know you're a valued customer when...

    Before I had a good look at this I had assumed that the logic was LS TTL. My local hackerspace has more LS TTL chips than you can shake your fist at. I may conduct a class there showing people how a 74HC259 can be a viable alternative to a 74HC595 in some cases. Even if they don't agree...
  15. (*steve*)

    Op amp problem ua741

    I do it laying down... You might have a pull-down resistor on the output, or minimise the amount of current the output has to sink, if you can, make the output source current (the pull-down resistor does this). You might also be able to redefine what zero means.
  16. (*steve*)

    You know you're a valued customer when...

    You get a huge "Cust Level Discount" Woo Hoo! :-D I wanted a single 74HC259. Can I get one? Noooooooo Would you order 10, or 25? Both in stock (tick) Both for delivery in 5 working days (tick) So now they're going to be dispatched on the 6th working day. I wonder if they're...
  17. (*steve*)

    74LS154, All the LEDs lights up when there is no input

    Because when either G1 or G2 are open, they will float high. Hafing either of these inputs high will cause all outputs to go high. G1 and G2 (pins 18 and 19) need to be tied low, not just tied together. edit: once you fix this, the LAST led will turn off (because all the other inputs will...
  18. (*steve*)

    Microphone for low frequency recording use

    Before you say that, you should probably read this. When the microphone is exposed to air to receive a sound wave, a small amount of acoustic energy reaches the diaphragm whose threshold sound pressure level is about 40 dB. Most electret condenser microphones cannot faithfully capture the...
  19. (*steve*)

    Using smd solder paste on pc board that no smd on pc board

    Beware that some eBay sellers describe flux as "solder paste", and that flux is available in tubes almost identical to solder paste.
  20. (*steve*)

    Philco Radio Parts Identification

    I would be very careful applying power of you suspect the filter capacitors of being faulty. You may damage the rectifiers, or even the mains transformer. edit: clarified "filter" capacitors
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