Tweet
What is this "shoes" you speak of? I make a technician's wage.
A lot of times you find the little inline connectors within a product - you know, 6 or 8 wires in a rowe. MAny of them have the one on the end one color, and the rest all a different color. Like the end one is black, and the rest white or gray. The odd one indicated pin 1. But some companies use the color code. so the wires across your connector would be brown-red-orange-yellow, etc. Find one of those cables in some piece of junk and tack it to the wall in front of you. Visual reminder.
One thing helped me learn was the number sequence. There are standard values of resistors. The numbers are in a series of 10, 15, 22, 33, 47, 68, 100. That is the 20% series. 20% parts were the most common when I was growing up, and you find them in old fenders. SO for example 10k, 15k, 22k, etc. There was no point in values between those since the tolerance ranges overlapped as it was.
SO when learning, there were certain combinations. Other than the 1 in 10 and 15, the colors didn;t repeat. blue and gray went together as 68. You were not going to find 64 or 58. SO yellow-purple was a common pair and orange-orange. ANd so on. To me this was easier than just learning them as individual numbers. I knew yellow-purple was 47, which made 4 and 7 individually that much easier to recall.
10% sequence added a few:
10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82, 100. The tighter tolerance ranges needed numbers between the others.
5%, well, by now, you pretty much just need to know all your numbers.
10, 11, 12, 13 ,15, 16, 18, 20, and so on.
But even in this day of 1% parts all over, we still tend to use the old common values. Yes, I do see such things as 243k plate resistors in a preamp circuit, but mostly I still see 220k or 100k. SO even using 5% parts, most designs still reach for the 1.5k cathode resistor rather than the equally valid 1.3k or 1.6k. SO most parts you see will still have the common color pairs.
I gotta say, it MAY not be a deal breaker, but when I hire a tech, count on the first test question I ask being some color codes. This color code bit of knowledge is so basic, universal, and all over, that I expect a man to know it. If you are plpanning to get yourself hired in electronics, do yourself a favor and take the time and make the effort to make it second nature. I tend to think when assessing an individual, that if he doesn;t know the colors, chances are his experience is limited.
A lot of times you find the little inline connectors within a product - you know, 6 or 8 wires in a rowe. MAny of them have the one on the end one color, and the rest all a different color. Like the end one is black, and the rest white or gray. The odd one indicated pin 1. But some companies use the color code. so the wires across your connector would be brown-red-orange-yellow, etc. Find one of those cables in some piece of junk and tack it to the wall in front of you. Visual reminder.
One thing helped me learn was the number sequence. There are standard values of resistors. The numbers are in a series of 10, 15, 22, 33, 47, 68, 100. That is the 20% series. 20% parts were the most common when I was growing up, and you find them in old fenders. SO for example 10k, 15k, 22k, etc. There was no point in values between those since the tolerance ranges overlapped as it was.
SO when learning, there were certain combinations. Other than the 1 in 10 and 15, the colors didn;t repeat. blue and gray went together as 68. You were not going to find 64 or 58. SO yellow-purple was a common pair and orange-orange. ANd so on. To me this was easier than just learning them as individual numbers. I knew yellow-purple was 47, which made 4 and 7 individually that much easier to recall.
10% sequence added a few:
10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82, 100. The tighter tolerance ranges needed numbers between the others.
5%, well, by now, you pretty much just need to know all your numbers.
10, 11, 12, 13 ,15, 16, 18, 20, and so on.
But even in this day of 1% parts all over, we still tend to use the old common values. Yes, I do see such things as 243k plate resistors in a preamp circuit, but mostly I still see 220k or 100k. SO even using 5% parts, most designs still reach for the 1.5k cathode resistor rather than the equally valid 1.3k or 1.6k. SO most parts you see will still have the common color pairs.
I gotta say, it MAY not be a deal breaker, but when I hire a tech, count on the first test question I ask being some color codes. This color code bit of knowledge is so basic, universal, and all over, that I expect a man to know it. If you are plpanning to get yourself hired in electronics, do yourself a favor and take the time and make the effort to make it second nature. I tend to think when assessing an individual, that if he doesn;t know the colors, chances are his experience is limited.
Comment