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    Making PCB at home - some help needed

    This is for those who make PCBs at home. I want to make a 12inx8in PCB at home. I've bought the board from Maplin Electronics (for those from the UK) and the developer and echting chemicals. After researching a bit on the net i found that the developer is Sodium Hydroxide and not suitable...
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    Interrupt and pulsin

    hi This may have been posted earlier sry. I have a digital input on input 0 of 18X. I would like to trigger an interrupt when a '1' arrives. (I've managed to do that bit.) And then count the number of subsequent ones. there are several possible 8 bit sequences coming through. 1 01 011 0111...
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    Input and output impedances

    Hi, I need to know the input and output impedance of the serin and serout pins on the 18X [and input2 (use as digital i/p), SCL, SDA], 28A, 28X. I looked at the datasheets from Microchip for these ICs but only impedances for ADC inputs which are 10K or 2K5. I really need these impedances for...
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    4014B PISO shift register with Serin

    Hi, I've read about using shift registers (8-bit PISO 4014B)with PICs on this forum. I understand that the serin command needs a start and stop bit. this would need 10-bits in total. I have the register working on its own fine shifting 8 bits using a 4kHz clock. a few questions: 1) is the clock...
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    Problems with I2C comms with external EEPROM

    Hi I'm using a PICAXE-18X with a external EEPROM (64K it is similar to other EEPROMs supplied by techsupplies. even the pin configs are the same) anyways... I'm recording data (just 1 and 0 for testing purposes) from input 2 and sending it on a I2C protocol every second. the code for writing the...
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    Blocks

    I'm wondering how do u use Blocks and define them... Am i right in saying that a block is basically a bit of code like If...End if? Let me know how to use them cos i'm writing a few programs which are very very long
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    BASIC TO ASSEMBLY problems

    sorry for the CAPS neways I'm trying to convert my basic program written for a PICAXE 18X into Assembler. When converting I chose the PIC16F627 (is this the correct choice?) I get a error message saying file not found. the file it looks for is wstamp16. I went to the folder stated and the file...
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    Using the Serial out pin in assembly

    I'm currently studying A level and my course requires programming in assembly. I need help in how to send Data out using a Serial Pin. In basic i would use the 'sertxd' command.. Can anyone tell me how to use a equivalent command or set of code in assembly language. The data which will be sent...
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