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  1. Sadlercomfort

    Music Keyboard - Increase Sustain/Decay Time

    Hi All, I have a 64 key electronic piano and as you play a note the note stops playing the instant you release your finger. This doesn't sound right at all, I have a sustain pedal which I can set to NC but this puts too much sustain on the notes and they being to blur together. o_O Adding...
  2. Sadlercomfort

    code for running 2 relays using 2 push buttons

    Did you need help with any written code? The code should be relatively simple, the 4-BIT LCD would be the difficult part..:rolleyes:
  3. Sadlercomfort

    Does electron die?

    If you were to calculate the speed of the electron, for example to switch on a 240AC light. It would take like 7 minutes for the light to come on.. The electrons move slowly on a small scale, so what switches the light on instantly? As the electrons move in the conductor it produces a...
  4. Sadlercomfort

    DesignSpark - Etching Test File

    Express PCB is much easier to use! Here's the test pcb I made..
  5. Sadlercomfort

    DesignSpark - Etching Test File

    I'm trying expressPCB now, I've given up on DS
  6. Sadlercomfort

    DesignSpark - Etching Test File

    I will be using copper clad board, I have photo-resist which i can apply myself. Hopefully will be much cheaper. What PCB software do you use Constantine? I'm trying to use designspark but when I place a component it doesn't show the solder pads.
  7. Sadlercomfort

    DesignSpark - Etching Test File

    Yeah :rolleyes: I was planning to start making a few of my own. Which would go hand-in-hand with my final year project in university next year! I created my own UV light box in a metal housing. It has a programmable timer connected to a relay, so I can switch on/off the UV at a precised time...
  8. Sadlercomfort

    DesignSpark - Etching Test File

    Hi All, Does anyone have a test board design, which can be used to test the accuracy of the etching process for diy pcbs? Something like this: Thanks, Ash
  9. Sadlercomfort

    µC - Temperature Sensor DS18B20

    Hi all, I'm really stuck trying to get my code to work and read temperature from the DS18B20. After I've parsed the temperature reading I seem to get 0b01111111 in whole degress C. I used this website to help me: https://www.maximintegrated.com/en/app-notes/index.mvp/id/2420 #include...
  10. Sadlercomfort

    IC 78XX

    Hi Chris, Here's a simple circuit which steps down 240 VAC to 9VAC. Its converted to DC using a single phase bridge rectifier. The DC is then regulated at 5V using the 7805 IC.
  11. Sadlercomfort

    Reading Temp from DS18B20

    Found some example code actually: https://www.maximintegrated.com/en/app-notes/index.mvp/id/162 Any further examples will still be appreciated! :rolleyes:
  12. Sadlercomfort

    Reading Temp from DS18B20

    Does anyone have some example code to read temperature from a DS18B20 or similiar device, in Hi Tech C?
  13. Sadlercomfort

    Transistors needed,

    The R denotes a decimal point, just like a 2.2K Ohm resistor is marked 2K2. 24000000 -> 24M 24000 -> 24k 24 -> 24R 2.4 -> 2R4 0.24 -> R24 So its a 0.24 Ohm resistor 7W :)
  14. Sadlercomfort

    Keypad header file for atmega

    It is common for the R/W pin to be tied to GND when not in use (to save MCU pins), which means you can only write data to the LCD. If you wish to read and write data to the LCD, you can connect the R/W to a MCU pin... Now you can set LOW to write data, HIGH to read data.
  15. Sadlercomfort

    Converting int to string - C Programming

    Hi Guys, How can I convert an int to a string using C programming Hi-Tech Compiler? I am using an ADC pin on a pic to measure a voltage, but need to convert the value measured to a string before I can display it on an LCD.
  16. Sadlercomfort

    Transistors needed,

    Ah, I had assumed google had already been probed :rolleyes:
  17. Sadlercomfort

    Transistors needed,

    These two are perfect! How did you find these dorke? I have limited experience with selecting transistors so had to look on farnell.
  18. Sadlercomfort

    Transistors needed,

    TIP41C or maybe TIP31C? The characteristics are fairly similar I guess it depends on the application, since choosing an equivalent transistor usually involves a compromise with its characteristics.
  19. Sadlercomfort

    Keypad header file for atmega

    There's a header file at the bottom of this page: https://people.ece.cornell.edu/land/courses/ece4760/keypadRW88/keypad.html
  20. Sadlercomfort

    programming microcontrolers

    Exactly!
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