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    Trying to identify and locate component or suitable replacement

    I put 522 into this companies search engine http://www.coilcraft.com/search.cfm/b/q?k=522&x=0&y=0&e=dta&sn=158897190&chr=UTF-8 Not sure if it's the same component but if not they may be able to help.
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    Sending and receiving data cheap

    No, just Arduino for receive and Atmega8 for transmit. It did improve some when I used the 3.3 volt on the Arduino rather than the 5 volt to power the receiver.
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    light sensor chicken door

    I can't see any diodes or caps on the breadboard?.
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    rand function in AVR C

    Found the problem. I went to upload a simple code just to test it using Atmel Studio 7. It said no. Seems that the _delay_ms or _us function can only take a direct integer, not a derived one. Used a simple delay function from AVR freaks and it works just fine. The electronics learner mantra. "To...
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    Really Need Advice Making Micro Wind Farm

    An answer to all your home made wind turbine questions http://www.scoraigwind.com/ http://www.otherpower.com/ http://www.thebackshed.com/windmill/home.asp
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    Sending and receiving data cheap

    Tayda have a helpful PDF http://www.taydaelectronics.com/datasheets/A-2861.pdf I have had limited success with these modules due to noise, they pick up lots of stray signals, may be something to remember if it's not working correctly for you.
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    rand function in AVR C

    Thanks for your replies. The return at the end of main is put there as a default by Proteus. Just to make sure I commented it out and it made no difference. Put the bit shifting into parenthesis and made the ran_num variable global, that also made no difference. Next step is to program an ATTiny...
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    rand function in AVR C

    This is a section of code that's giving me problems in a project and I can't work out why. The purpose is to use the rand function to generate a number between 1 and 100 then use this number to randomly alter the delay time that an led is on. #include <util/delay.h> #include <avr/io.h> #include...
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    EPROM for Automotive

    What make model and year? The reason I ask is that all ECM's can be flashed. Never ever heard of one that was 'locked'
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    RGB Led cube and more..

    I highly recommend the Youtube channel of Great Scott. I learn a great deal from him.
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    328P datasheet

    Thank you so much. I'm getting the hang of reading the bits right to left and beginning the count with 0, but when they share a byte between 2 registers, that one had me stumped.
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    328P datasheet

    Atmel have updated their data sheet so it's now on page 352 http://www.atmel.com/Images/Atmel-42735-8-bit-AVR-Microcontroller-ATmega328-328P_datasheet.pdf
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    328P datasheet

    It's not the pin position that I'm having trouble with. Page 300 of the full datasheet shows the data pins used for HV parallel programming being PC(1:0) : (PB(5:0) My question is that as they are sharing port B and port C to give the data byte, is bit 0 on PC0 and bit 7 on PB5, or is bit 0 on...
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    328P datasheet

    Due to ignorance and not taking sufficient time I've managed to brick an Atmega328, well a couple of them actually. Of course there are various commercial and DIY fuse doctor programmers on the web, but just copying and pasting Arduino code doesn't help me learn anything. So I decided to write...
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    Electronic math

    Thank you all for your answers. I accidentally answered my own question while searching for something else by stumbling over this site: archive dot org. Thousands of technical books all in the public domain including hobby electronic and computer magazines from the 60's, fascinating reading.
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    Electronic math

    A 62 year old student question. I keep coming up against the stumbling block of my limited mathematics knowledge which is holding me back. Yes I understand Ohms law, but anything after that I'm having to learn from scratch. After all they taught me algebra nearly 50 years ago, and I wasn't...
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    EBay stores

    If I'm in no hurry to get components I gravitate to EBay's offerings from the far east, and I'm sure I'm not alone, It seems silly to buy things like Pro Mini Atmega boards for $10 locally when I can get 5 of them for the same price with free shipping. Recently I have been price shopping for a...
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    Voltage regulator question

    Front mounted distributor with solid core plug wires. I intend to change them for carbon wires and add resistor spark plugs to try and help.
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    Voltage regulator question

    My project is to be used on an old 1949 Ford tractor. Incredible performance of 0-60 in about 3 weeks:D The unfortunate thing is the ignition system is so noisy that a radio will pick up the interference from about 5 yards away, but I want to use a micro-controller! I read the National...
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    DC-DC Voltage Step Down Module

    Far from being an expert, or even a competent amateur, but I agree that the inductor is a low value and at 35 volts so is the rating of the input capacitor. Just checked the TI datasheet. Input capacitor 470uF 50V Inductor 68uH Output capacitor 220uF 35V So they both appear to be wrong?
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