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Recent content by nurm.

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    ATMEGA64L arithmetic operation of 2 4x4 keypad inputs and display the result on lcd

    convert_end: //out PORTC, temp ; write value to PORTC ; read a character from the string ldi del_lo, low(30000) ldi del_hi, high(30000) rcall delay rcall delay mov data, temp rcall lcd_wait_busy rcall lcd_write_data rcall delay rcall delay rcall storeOrAdd ret ; return...
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    ATMEGA64L arithmetic operation of 2 4x4 keypad inputs and display the result on lcd

    Hey there, i'm using atmega64l board with 4x4 keypad. i'm also using assembly language to write the code. i know how to interface and display the inputs from the keypad to the lcd, but i'm struggling to understand how to do addition operation between those inputs and display the result on lcd...
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    Need help to design a negative power supply from 5 Vdc.

    Could you explain why buck-boost is complicated? Thanks mate.[COLOR="Silver"] ---------- Post added at 10:34 ---------- Previous post was at 10:33 ----------
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    Need help to design a negative power supply from 5 Vdc.

    I don't think I can use 7660 in this project. but I'll try to ask my lab demonstrator tomorrow. Thanks btw. ---------- Post added at 00:08 ---------- Previous post was at 00:04 ---------- ...I'm allowed to use only these components: resistors, op-amp, comparators, transistors, resistors, c...
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    Need help to design a negative power supply from 5 Vdc.

    Since i can use a clock generator with 5Vdc as the input of my circuit, I reckon it is redundant to use the timer IC just to invert and reduce its amplitude as the IC's input can only accept Vdc input. Because, after that, I'll need to generate a signal(square wave). or Can I just connect...
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    Need help to design a negative power supply from 5 Vdc.

    Hey guys. I really need your help to design this power supply. I'm still blur about this thing. Here are the details: It must be powered from Vcc=5V and I may use an incoming clock signal. Range of the output: -4V<Vout<-6V I'm allowed to use only these components: resistors, op-amp...

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