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Score of 0
1 answer
20 views

Usually these old sets use a Colpitts oscillator as the local oscillator, but the one in this Motorola VT73 is strange. I have no idea how it works and would like to understand its' operation. Any ...
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32 views

I am going through all of jakob bakers examples from his cmosedu website and this one in particular does not make sense. This example is from a file named Fig9_34 which can be found in the ...
Score of -1
1 answer
48 views

This is an issue that I keep coming across and I still dont have a full answer on how to deal with this situation aside from using a mechanical switch or pins. My board will be powered by battery ...
Score of 1
1 answer
45 views

I designed this circuit based on a lecture from class. I'm not focusing on specific component values yet, as I will calculate them later. My professor mentioned that using the components we learned ...
Score of 0
1 answer
73 views

simulate this circuit – Schematic created using CircuitLab I'm trying to design a DC Ground fault protection device for a PV array. While simulating the design, I tried introducing some AC noise ...
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1 answer
45 views

I need to rebuild a high voltage rectifier stack for a high power FM broadcast transmitter. The original parts and similar ones are long out of production. The stack is made up of 18 stud rectifiers ...
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1 answer
43 views

1. How is it possible to calculate Laplace Transform Battery-RLC Circuit Output with Inductor and Ouput Voltage Initial Conditions? I was calculating output Voltage \$V_{out1}\$, with an initial ...
Score of 2
3 answers
124 views

I'm designing a low-side PWM driver for a 24 V brushed DC motor that draws around 15 A of continuous current. The motor is driven using PWM at a frequency between 2 kHz and 5 kHz, with a variable duty ...
Score of 0
1 answer
53 views

The attached image shows the Power Analyzer configuration for my PCB. I would like to understand how to correctly configure the maximum current density for both surface and internal layers. For ...
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1 answer
73 views

Below is my circuit diagram: The circuit works fine as a light detector but when I swap the positions of the resistor and LDR connected to the base of the BC547B transistor, the LED gets stuck in the ...
Score of 2
1 answer
201 views

I am working on an amplifier that requires a 30V 10amp DC power supply. I want to build this myself to house the converter from 120V wall AC to DC inside of the speaker's chassis itself, mostly to ...
Score of 3
0 answers
106 views

Why do multimeter's datasheets give resolution and not sensitivity? RESOLUTION - the smallest portion of the signal that can be observed. SENSITIVITY - the smallest change in the signal that can be ...
Score of 2
3 answers
713 views

I'm putting together a portable equipment rack for field use - the usual sort of thing where a collection of off-the-shelf items are mounted together into a peli-case as a one-off assembly. All the ...
Score of 1
0 answers
35 views

I am building a setup for the qualification of some devices that will need to pass DO-160 and in particular section 20 conducted & radiated. I've already passed these tests on other devices with ...
Score of 1
2 answers
141 views

I have an IC with marking '52' then '64' vertical then 't'. Can any one help? It's in a power supply which outputs 24, 64V. Its input from the white wire beside the two red and black 360V after the ...

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