Errata

Make: More Electronics

Errata for Make: More Electronics

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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 xxix
2nd paragraph 2nd column

Continuity. Having finished 'Make: Electronics' and moving to 'Make: More Electronics' I found this inconsistency which has me wondering which wire gauge to have in my Amazon wish list. This is in reference to breadboard wire.

'Make: Electronics': ...I will now emphasize that the wire should be 22-gauge, not 20-gauge, and not 24-gauge. You will find that the 24-gauge wire doesn't fit tightly in a breadboard, and may not make a reliable connection, while 20-gauge wire is just a little too thick...

'Make: More Electronics': As for wire thickness, I think 24 gauge is by far the best choice for breadboarding. If you use 26 gauge, it tends to kink too easily when you're trying to push it into the holes; and after it's inserted, it sits too loosely. On the other hand 22 gauge is too tight a fit.

Thanks

 Darrel Dronet  Jun 19, 2020 
Other Digital Version 1
Caption of Figure 1-1

Figure 1-1 and other text shows a 470-ohm resistor, but caption for Figure 1-1 says 220-ohm resistor.

 Anonymous  Feb 24, 2021 
Printed Page 34
Left collumn, 2nd sentence


“Now if the light falling on the phototransistor gradually diminishes……”

 Ernest Santner  Aug 25, 2020 
Printed Page 52-53
Figure 7-15 and paragraph 3 of the "Testing" section.

According to paragraph 3 under Testing, it states that the inputs should be terminated and that "one input should have a clearly defined high state, while the other has a clearly defined low state". If the output is not being used, why does it matter? Also, I looked at figure 7-15 before reading that the first time which shows a mix of both scenarios, which I found confusing since I had not read the previously mentioned paragraph yet, which prompted me to review a data sheet for this IC. The On Semiconductor datasheet specifically states that unused inputs should be grounded.

https://www.onsemi.com/pdf/datasheet/lm339-d.pdf

 Josh Curry  Jan 27, 2022 
Printed Page 80
Step 7

I believe the formula for Vi should be Vm - (Vcc / 2). Otherwise you don't get a series of numbers starting from a negative value and increasing as the number in the first column of the table increases. Assuming resistor and voltage values are 'perfect' the calculation for Vm would look like this.

Vm = 9 * ((100,000 + 1500) / ((100,000 + 5,000 - 1500) + (100,000 + 1500)))
Vm = 9 * (101,500 / 205,000)
Vm = 4.4561

Using the formula presented in the book, Vi = (Vcc / 2) - Vm, we get the following...

Vi = 4.5 - 4.4561
Vi = 0.0439 or 43.9mV

Since we expect this first value to be negative I believe that the formula is meant to be Vi = Vm - (Vcc / 2).

Vi = 4.4561 - 4.5
Vi = -0.0439, or -43.9mV

The text in the paragraph that follows the formula also describes subtracting Vm from dividing Vcc / 2.

 Josh Curry  Feb 01, 2022 
Printed Page 96
Figure 13-8

On Figure 13-8, there are two IC's. One is a LM741 op-amp, and the other is a 555 timer. Pin 5 on the 555 timer is not connected to a 0.01uF capacitor. It shows that connection of the schematic of the circuit. the schematic is on figure 13-7.

 Anonymous  Jun 23, 2020 
Printed Page 305
Figure 35-10

On Figure 35-10 on page 305, there is a XOR gate that takes inputs from the 7 input AND and pulses from timer. It doesn't have an arc above it like all the other XOR's.

 Anonymous  May 29, 2020 
Printed Page 311
Figure 36-1

The XNOR that has inputs from A and negative power, doesn't have a arc above it like all the other XNOR's.

 Anonymous  May 29, 2020