All Questions
0
votes
0answers
29 views
Issue with multichannel LM317 circuit
I'm building a 4-channel 0-10v power supply for controlling a set of dimmable Meanwell LED drivers. I'm basing my design off this circuit:
I simply repeated the same circuit four times on the same ...
0
votes
0answers
17 views
How can I implement Bluetooth Low Energy CRC in 24 bits?
According to the Bluetooth Core 4.0 specification, the Bluetooth Low Energy air packet has a 24-bit CRC with the following polynomial:
...
1
vote
2answers
29 views
BNC splitter which separates ground and signal?
I'm a student doing research in a physics lab and we often have the need for a certain type of BNC cable splitter. This splitter has a BNC jack which accepts a single coaxial cable as input. It has ...
0
votes
2answers
43 views
Paralleling of 2 power supplies with different voltages
I have 2 full bridge dc-dc converter from 12 to nearly 170 volts. each one are designed to 250 watts...
I am designing the transformers and is very complicated to make exactly equals by homemade and ...
0
votes
1answer
32 views
How to apply fourier transform to \$0.5^n u(n)\$
I'm working in a signals class for continuous signals, and we have this problem shown above. I have tried using this function \$f_1*f_2 = F_1 * F_2\$, where I'm assuming this means multiplication of ...
-1
votes
0answers
26 views
Multiple baud rates on Arduino [on hold]
I am using the uno. I tried changing the baud rate mid-program as my sketch below shows. The sketches work fine separately, but not when combined into the sketch below.
//[code]
include "SIM900.h"
...
1
vote
1answer
29 views
CMOS output voltage depending on Vss and Vdd
How does output voltage in CMOS depend on Vdd and Vss? As far as I know, it is limited by Vdd when Vss = 0 (ground) but what when Vss is not 0 (for ex. -2.5 V?)
1
vote
0answers
22 views
ATMEGA UART transmition with flow control
Background
I'm using atmega328p to send data to another device in high baud rate (230400). The device I'm sending data to supports flow control and raises RTS signal when it needs to hold the ...
-5
votes
0answers
40 views
transfer power by wireless [on hold]
Voltage Source, Vdc 9 V
Resistor 15K
Capacitor, C1 100 nF
Capacitor, C2 470 pF
Capacitor, C3 4.7 nF
Transistor 2sc1558
that for transmitter
Diode, D1 1N4148
mobile 5 v
Capacitor, C1 ...
1
vote
1answer
44 views
Can mobile cell stations cause interference in audio circuits near them?
It's a fact that if you put a GSM cell phone near a desktop PC and call it, the phone will interfere with the audio card and cause that noise most of us have heard somewhere.
But is it the case with ...
1
vote
1answer
101 views
Emitter resistor - why?
I was told to add an emitter resistor to the transistor T1. I'ver been researching the subject and could only find vague info about the E resistor and now I'm utterly confused. The transistor here ...
0
votes
1answer
38 views
Loudspeaker transducer FCC certification?
Is FCC certification necessary for speaker transducers that are sold as assembled units in their housings?
I found information on active speakers needing fcc certification, but what about passive ...
-6
votes
0answers
64 views
Why voltage control knob should be in minimum position and current control knob in maximum position in power source? [on hold]
Why voltage control knob should be in minimum position and current control knob in maximum position in power source ? When we are applying this power source to some electrical or electronic circuit . ...
-1
votes
0answers
15 views
induction motor develop trque and the starting torque concept [on hold]
Hi.
this is a question about induction motor.
I see many equaion about induction motor about torque.
they have many different torue type. I'm confuse which one is which
...
0
votes
1answer
41 views
Customizing both voltage and amperage in a circuit
I intend to control a motor via H-bridge L6205N (PowerDIP20). H-bridge's logic input requirements are:
High level logic input voltage: 2-7 V
High level logic input current: 10 μΑ
Motor's supply ...
