Comment by periblepsis on I am repurposing a Logitech M815 and need help...
@WumboTheSecond You want to know how a mouse works? Older mice used a special ISA board with the mouse (the bus mouse) or else used RS-232 port (serial mouse). Special software was loaded, too. But...
View ArticleComment by periblepsis on Why is this Baxandall audio gain control circuit...
I'm heading off to sleep, but if k'=0 then opamp A is a follower and can be removed leaving Ra and Rb in parallel so opamp B is also a follower whose output follows the (+) input at ground -- no...
View ArticleClik here to view.
Answer by periblepsis for Calculating Thevenin's resistance in circuits with...
Let me draw the circuit and show the test current:simulate this circuit– Schematic created using CircuitLabThe solution is as follows:idep = vx/r2cccs1 = 30*idepkclx = Eq( vx/r1 + vx/r2 + vx/r3, vs/r1...
View ArticleComment by periblepsis on Device customised Clap Circuit
@Mathew Are you allowed to use oscilloscopes?
View ArticleComment by periblepsis on Choosing between a linear regulator and a zener diode
Cyril, there's almost no good reason to avoid the AMS1117. It operates with the given overhead and provides many important features. A zener design could be modified (not the one you show, exactly) to...
View ArticleComment by periblepsis on Amplifier based on a bipolar transistor with a...
@ioftenfeellonely The circuit you show is poor. At an input of only 10 mV peak, you will already see THD at 10%. At 30 mV peak it will be 25%. What's the goal?
View ArticleComment by periblepsis on 50V pulse generator with large resistive load
Have you attempted a sanity check by computing the capacitance using \$C\le\frac{I\,\cdot\, \Delta t}{\Delta V}\$? Not much.
View ArticleComment by periblepsis on 50 V pulse generator with large resistive load
Have you attempted a sanity check by computing the capacitance using \$C\le\frac{I\,\cdot\, \Delta t}{\Delta V}\$? Not much.
View ArticleComment by periblepsis on Does Ic reverse its current flow when BJT in...
Jesse, have a look at the three models (all of them are identical, just phrased differently, math-wise) shown here. Take the case where saturation is taking place. Follow the math. See where it takes...
View ArticleComment by periblepsis on Square wave DC voltage doubler
TRAXX, The author of that video clearly doesn't fully understand the circuit. That's obvious from how he describes part of the cycle in the video. He's also getting load voltage values that are lower...
View ArticleComment by periblepsis on How to solve a elementary Wheatstone bridge with...
The author appears to specifically request a nodal analysis approach. To the degree possible.
View ArticleComment by periblepsis on How to solve a elementary Wheatstone bridge with...
@ForeverDrivin I've addressed your work in an addition to my answer. Do note that a proper simulation confirms the results I achieved using theory and math.
View ArticleComment by periblepsis on Introducing Timing Constraint For Double-Clap...
@Mathew Are you allowed to use oscilloscopes?
View ArticleComment by periblepsis on Best way to clean tarnish off small brass parts?
Have you tried muriatic acid (HCl?) It is very fast and thorough. Just be sure to flush with water quickly after.
View ArticleComment by periblepsis on NPN BJT (PBHV8140Z) Incorrect Gain?
The VAF given in the model is 22. Which is an unusually low value (unusually steep slope.) Looking at Figure 5. I find a typical value closer to about 30 ((5-1)/(1.21-1.08)=30.77) looking at the curve...
View ArticleComment by periblepsis on Using Schmitt trigger but output with slow...
Try using a 74AC14. They are pretty fast. If you want to see just how fast, then view this video.
View ArticleComment by periblepsis on Is my analysis of an audio amplifier correct?
@deadrat \$r_e^{\:'}\$ is just another way of expressing the dynamic slope at the DC operating point.
View ArticleClik here to view.
Answer by periblepsis for How to properly size R and C in a low-pass filter...
You really should specify the edition (there are 3 of them) and the exercise numbers. Page numbers would also help.To put this into context, you are discussing the following exercises found on page 66...
View ArticleComment by periblepsis on Slow rise time for a temperature sensor
Basj, Not cheap, but you can use a very thin, low mass phosphor paint and use it to paint a tiny spot. Then use pulsed light to measure the temperature. I've use a ceramic on a jet turbine fan blade at...
View Article