Errata
The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
| Version | Location | Description | Submitted by | Date submitted |
|---|---|---|---|---|
| Printed | Page Page 87 Under the You Will Need List for Experiment 10, a 1uF capacitor is listed. Throughout the experiment, the only capacitor shown, such as Figure 10-17 is 1000uF |
On page 87, Experiment 10 "Transistor Switching", in the section titled "You Will Need", one of the items listed as need is a "1uF capacitor". |
Kevin | Mar 03, 2024 |
| Printed | Page Page 166-169 Figures 17-11, 17-12, 17-17 |
Re: my earlier report, capacitors C7 and C9 are actually correctly shown as 100 microfarads, so the issue is just with the values for the RC networks (R3 / C1 and R8 / C5), with a combination of 10 microfarads and 47k giving a charging time of just 0.47 secs or 4.7 secs with the 470k resistor substituted. So I believe these capacitors should be 100 microfarad as well. |
Laurence Scotford | Sep 05, 2024 |
| Printed | Page page 169 Figure 17-16 |
In the circuit diagram for the alarm project, showing the wiring for controls mounted in the box, the Go button is shown connected to the positive supply via the power switch and then to the circuit board. I believe it should be connected between the negative connection from the power supply and the board, since this button is supposed to take the trigger on IC 1 low. With the wiring as shown, this button will do nothing as it will simply connect IC 1 pin 2 to the positive supply, and IC 1 pin 2 is already held high by the pull up resistor, R2 (see full circuit diagram figure 17-13 on page 167) |
Laurence Scotford | Sep 05, 2024 |
| Page 82 Time Constant Verification : Paragraph 2 |
Circuit should already have 10K resistors from earlier pg80 substitutions for R1 and R2. Note from the Author or Editor: |
Michael Clark | Jan 01, 2022 | |
| Printed | Page 166-169 Figures 17-11, 17-12, 17-17 |
The circuit diagrams for the alarm circuit show two 10 microfarad capacitors in the RC networks for IC1 and IC2 and two 100 microfarad capacitors connected to the the reset pins of IC2 and IC3. I believe these have been accidentally transposed in the drawings. The 100 microfarad capacitors should be in the RC networks for IC1 and IC2 while the 10 microfarad capacitors should be connected to the reset pins of IC2 and IC3. This error will not stop the circuit from working, but it will mean that the timing is not correct (it will be closer to .3 of a second for 47k resistors used in testing and 3 seconds for 470k resistors used in final circuit, when it should be 3 seconds and 30 seconds respectively). |
Laurence Scotford | Sep 02, 2024 |
| Printed | Page 178 5th paragraph ("If the display shows 0..." |
The paragraph describes with certainty that the display showing 0 has to be an issue with the timer, or the wiring from the timer's output to the 4026B chip. However, I have encountered a different situation - which kept me searching for quite a while! - which can cause the issue: R10 being connected to the positive bus instead of the negative one. It may be helpful to others to acknowledge this in the book. |
Roberto | Feb 16, 2024 |