Comments on: Chapter 4: Interfacing Electronics

By: Mark

Mark — Tue, 16 Jan 2018 04:44:27 +0000

Yes, the correct equation for I2 would be I x (R1/(R1 +R2))

By: Nikola Kostic

Nikola Kostic — Thu, 09 Nov 2017 20:37:43 +0000

Prof.Molloy, I suppose the truth table for the flip-flop in the “Debouncing a SPDT” is wrong. Input S=0 & R´=1 should output Q=1, and of course, for the Input of S=1 & R´=0 should result in the Q=0.

By: fdeming

fdeming — Sun, 01 Oct 2017 19:16:16 +0000

On page 121 the top equations for the current divider rule both I1 and I2 are equivalent as written. Shouldn’t I2 be equal to I x ( R1/(R1+R2) . Then the numbers come out in the above example. Also Is = I1 + I2 = 50mA + 25 mA = 75mA.

By: neon

neon — Fri, 18 Aug 2017 10:07:56 +0000

I tried to repeat the MOSFET experiment in this chapter, it damage the transistor when I fed in 1MHz pulse from analog discovery 2, so I refer to BS270 datasheet (http://www.farnell.com/datasheets/2264923.pdf?_ga=2.49991718.101956756.1502767186-603351120.1483770701), and found out the transistor if switched above 10KHz (while Vds = 5V) will draw over 2A and damage the transistor. Hope the author can help clarify this.

By: William

William — Fri, 07 Jul 2017 07:33:22 +0000

For the component list. There are so much to choose from at Farnell/Elfa etc… It would be really nice to have listed the Farnell product numbers or similar, so we get exactly what we need.

By: Jim

Jim — Sat, 22 Apr 2017 00:09:31 +0000

The equation should read: R=Vr/Ir =5V/100ma= 50 ohms

By: GT

GT — Sun, 29 Jan 2017 19:48:43 +0000

The Ch. 4 Errata should apply to page 118, not pate 188.