Errata

Need to insert language about trademarks:

"Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and Maker Media, Inc., was aware of a trademark claim, the designations have been printed in caps or initial caps."

It states that in United States and much of Europe AC power is supplied at 110-120V.

In Europe the vast majority of AC power is 230V for domestic use, looking at the map it seems that no country in Europe uses 110V system. Outside North America just a handful of countries uses 110V system in the world

Note from the Author or Editor:
The reader's description of the error is correct.

On page 14, right-hand column, fifth line from the bottom, change "much of Europe" to "a few other countries"

"Each micro-amp being 1/1,1000th of a milliamp "

I believe that number should read 1/1,000th.

Note from the Author or Editor:
The reader is correct. Page 15, left column, second paragraph, 1/1,1000th of a milliamp should be changed to

1/1,000th of a milliamp.

Caption should read:

Measuring the potential difference across the potentiometer.

I believe the correct SKU for the example toggle switch is ST163D00 which is an On-On switch rather then ST16DD00 which is a Momentary-Off-Momentary switch.

Note from the Author or Editor:
The reader is correct. On page 47, third paragraph, please change ST16DD00 to

ST163D00

In the following statement:

"Figure 2-53 shows what happened when you were not pressing the button. The switch contacts relaxed into their opposite state, breaking the connection between A and B"


"between A and B" should be "between A and C"

Note from the Author or Editor:
The reader is correct. Page 62, right column, fourth line, delete "and B" and substitute "and C"

Note from the Author or Editor:
Removed the words "just over three seconds."

...and substituted in the words "almost six seconds."

Caption refers to the "preceding breadboarded circuit." This should be changed to read "the next and final breadboarded circuit in this experiment."

Ref Figures 2-90 and 2-91. Pressing button B does not seem to discharge the capacitor. No change in the V reading is shown, even for a split second when that button is pushed. The figures show that pushing button B connects the the two sides of the capacitor, but the positive input is still connected, with no connection to ground. Is this the correct way to discharge the capacitor? Should there be a ground connection for both sides of the capacitor similar to Figures 2-86 and 2-88? Pushing button A does what's described in the book.

Note from the Author or Editor:
Because the circuit in 2-90 has been reversed compared with 2-88, really we are now charging the capacitor instead of discharging it, with Button B. Therefore on page 83, left column, the word "discharge" should be deleted and replaced with "charge." Sorry for the confusion.

Everything else should work as described. If pressing button A does not produce the result described on page 83 (right column), your meter may not be responding quickly enough. Try using a larger capacitor, or multiple capacitors in parallel?

Please notify me if you still have problems. You can use this address to reach me directly: make.electronics@gmail.com.

Figure 2-120 the blue cable that is to the right of the 1k resistor near the speaker

The blue cable is trying to connect one of the holes in the columns to the power bar. However there is no hole in the negative power bar where you show it connected. Its one of the areas of the breadboard that isolate parts of the breadboard.

Note from the Author or Editor:
The reader is correct. I will supply a new version of Figure 2-120.

first column :
"100 microF capacitor connected between pin 6 and ground"

second column ;
"double the value of the 100 microF capacitor on pin 6"

Either the pin number is 5 or the capacitor is 0.1 microF !

Note from the Author or Editor:
Page 162, column 1, last paragraph, delete "pin 6" and substitute "pin 5."

Page 162, column 2, second bullet point, delete "pin 6" and substitute "pin 5."

In the sentence: It holds the base of the resistor at a low voltage...
Should resistor be transistor?

Note from the Author or Editor:
On page 167, third para, 8th line, change "resistor" to "transistor."

(I believe I have the eighth release of the second edition)

One of the suggested part numbers for a seven segment LED is Lite-On's LTS-546AWC.

The LTS-546AWC is a COMMOM ANODE seven segment LED. The corresponding schematics/diagrams for this section show a COMMON CATHODE part being used.

A suitable replacement might be the Lite-On LTS-5003AWC.

Note from the Author or Editor:
Page 178, column 2, line 5, I deleted LTS-546AWC and substituted LTS-5003AWC.

For consistency, the same change is required on page 323, column 2, second paragraph, last line. Deleted LTS-546AWC and substituted LTS-5003AWC.

On Figure 4-62 the long vertical YELLOW wire is on the second column while the shorter PINK wire is on the third column.
In Figures 4-69 and others of the same circuit, where these wires are grayed out for clarity, they are REVERSED.
Since it makes more sense to have them as Figures 4-69, etc. show them, I assume that they should be the same way here.

Note from the Author or Editor:
The reader is correct, although the functionality of the circuit is not affected. It will be less confusing if the schematic in Figure 4-62 is changed to match the layout in Figure 4-69. I will deal with this.

The jumper cable in the second row just under the negative connection on the breadboard on figure 4-72 is grey as if it was already placed on the breadboard before this step.

However this i a new jumper cable that has to be placed during this adjustment as the other blue cables in row 2 of the breadboard. Found this while I looking for why my circuit is not working as intended in this step.

I have the thirteenth release of the second edition which might not be the most recent one but it is quite recent.

Note from the Author or Editor:
The error report is corrrect, and Figure 4-72 must be updated.

Note from the Author or Editor:
Removed "C, D, and E"

And substituted in "B, C, and D"

Also made this same change in the 8th paragraph.

A minor issue with the color coding of the 1 meg resistor in both figures, it is labeled correctly but the color coding is wrong.

Note from the Author or Editor:
The reader's description of the error is correct.

Trigger input is blue. It should be red in Figure 4-119 and probably 4-121.

Note from the Author or Editor:
The reader is referring to the little blue circle on pin 2 of the 555 timer chip in Figure 4-119 and 4-121. The circle should be red, for consistency. This does not affect the functionality of the circuit. Replacements for these figures should be included in the next printing of the book.

In Figure 4-138 74HC393 is referenced as a 'decade' counter, based on the rest of the experiment it is a binary counter.

Note from the Author or Editor:
The erratum report is correct. On page 224, in the figure caption, delete the word "decade."

Under the Modulus Heading, instructions to disconnect the Pullup resistor are given when the resistor in question is a pulldown resistor.

Note from the Author or Editor:
The reader's description of the error is correct.

On page 227 of the printed edition, first line of text under "The Modulus" subhead, change the word "pullup" to "pulldown."

"using positive end of capacitor C6 as your input point"

if it's for testing the LM386 as an amplifier,
it should be capacitor C5 instead of C6

Note from the Author or Editor:
The reader is correct. On page 265 of the print edition, second column, first paragraph, last line, C6 should be changed to C5.

Potentiometer 10K is listed in Figure 6-4 on page 320. However, this does not match the 1K potentiometer mentioned in the 2nd column, 4th paragraph on the same page, or Figure 6-3 listed on the previous page 319.

Note from the Author or Editor:
The table in Figure 6-4 will be updated so that Potentiometer 10K is changed to Potentiometer 1K.