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18 V AC to 5 V DC circuit design with battery

I’ll start by saying I have little understanding of electronic circuits. I have an old door phone to which I have connected a wireless switch in order to be able to open my door with a remote control. ...
ManosK's user avatar
  • 1
1 vote
1 answer
30 views

single phase into vfd

I have a three phase in three phase out vfd which is rated for 230V. I would like to use it to power a three phase motor. The manufacturer of the drive states it will run from a single phase input, ...
Simon Mclennan's user avatar
0 votes
3 answers
160 views

Scaling DAC voltage to smaller range for controlling gate of transistor

I need to scale a DAC voltage which is ranging from 0-5V to a voltage ranging from 3.8-4.2V to control the gate of a mosfet in its linear region. I want the 0-5V range from the DAC to linearly ...
Nego24's user avatar
  • 25
0 votes
2 answers
92 views

MEMS Microphone Convert V to dBV

At first is sampled data from the IMP23ABSU MEMS mic converted to V by multiplying each sample by the conversion factor \$ \frac{1}{32786} \$. Then i want to calculate the FFT and PSD after applying a ...
Tom's user avatar
  • 25
0 votes
0 answers
37 views

Capacitor value for this motor [duplicate]

I have the motor in the picture. In the triangle connection, what is the cap-s value in order to get it running ok? Same, is there any formula / calculus for this situation (triphase motor running on ...
Pilgrim's user avatar
2 votes
0 answers
37 views

What is the ideal wireless protocol that is best suited for wireless nerve impulse transmission? [closed]

I am working to develop a way to transmit nerve impulses wirelessly (or wired) past a break in the spinal cord. What would be the ideal protocol to effectively relay the signal? Even if the device was ...
Lunatic Radio's user avatar
1 vote
1 answer
126 views

How to convert from datasheet dB value to pressure per volt?

I am trying to measure sound waves using a Raspberry Pi Pico ADC pin but am having trouble converting the sensitivity value on my data sheet into pressure units per volt. I have read a many articles ...
user10709800's user avatar
0 votes
0 answers
67 views

EMI Input filter

I am looking at using a Cincon PDF700 AC-DC converter in one of my designs. In the datasheet it shows the EMI filter as having first a 30 mH common mode choke and then a 3 mH common mode choke using 2....
Dominic Smith's user avatar
0 votes
1 answer
974 views

Can I convert a 36 volt battery to a 48 volt battery or how do I extend a 48 volt 10 amp hours to 48 volt 20 amp hours? [closed]

How do I convert a 48 volt 10 amp hours to 48 volt 20 amp hours battery? Can I convert a 36 volt battery to a 48 volt battery?
Brian B 's user avatar
0 votes
3 answers
379 views

How can I convert 5V (USB) to 3V to replace two AA batteries in series?

My knowledge on this is a little rusty. What kind of resistor do I need to put in there? There are 10 LEDs. I'm pretty sure they are in parallel.
BiomedicalEngineeringStudent's user avatar
0 votes
1 answer
282 views

Using 0-3 V sensor with 0-10 V PLC

I have a sensor that generates an analog 0-3 V output signal. I would like to connect this sensor to a PLC which has only 0-10 V analog inputs. My questions are: Is this recommended to do in general? ...
bardulia's user avatar
  • 407
0 votes
1 answer
151 views

PSpice model to LTspice (SSM6L09FUTE85LF transistor)

I can't convert a specific transistor model from PSpice to LTspice. Maybe someone has ideas on how to do it? Transistor: SSM6L09FUTE85LF Toshiba https://eu.mouser.com/ProductDetail/Toshiba/...
Urtė Toliušytė's user avatar
0 votes
0 answers
142 views

PWM Fan Controller, inverted duty cycle

What I am trying to design is a 12 V DC controller for a PWM fan that uses a 100 Hz input signal and reversed duty cycle between 8 and 87 % to drive it. What I mean by reversed is that the fan is on ...
TronCarter's user avatar
1 vote
0 answers
60 views

Why the ROC is all s? (Signals & System)

The problem from mit ocw signals and systems (open for everyone) https://ocw.mit.edu/courses/6-003-signals-and-systems-fall-2011/ Sorry, I tried to write it Latex, but it doesn't work well. Sorry that ...
Jin's user avatar
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0 votes
0 answers
62 views

Converted PC power supply producing too much voltage

I have converted two ATX PC power supplies to 12V bench power. They have worked flawlessly for the past 5 years. Suddenly, both are providing 17V+. What could be causing this? I have a 10ohm ...
shaggy_sb5's user avatar
0 votes
2 answers
610 views

How to convert 0-3.3V DC into -/+10V? I am using a MAX3232

The 3.3V DC is output from a MCU. How I can convert to a +/-10V signal?(0 for -10V, 3.3V for 10V.) If you can, please give me a circuit diagram using the max3232. I just used Multisim to simulate ...
junjie's user avatar
  • 3
-1 votes
1 answer
1k views

Measuring ohms on 200 scale

I hope this is on the correct form. I’m measuring the resistance of a stator. The shop manual says I should get a reading of between 5.7 and 8.0 on an ohm scale of Rx1000. The meter I have has scales ...
Oldoldhouseguy's user avatar
4 votes
2 answers
158 views

Variable SAR-ADC conversion time with internal clock

In the ADS8867 datasheet it says: Conversion duration may vary but is bounded by the minimum and maximum value of tconv, as specified in the Timing Characteristics section. (p.18) The conversion ...
Hyp's user avatar
  • 877
1 vote
1 answer
1k views

Conversion from 0-10V to resistance - Methodology

Summary Finding the most appropriate methodology for converting a variable voltage output to a variable resistance to mimick/replace a thermistor based sensor. Use case/Example There are two equally ...
nicoleise's user avatar
0 votes
3 answers
74 views

A machine's energy consumption per product

I need to find the energy consumed per product. Let's say we have product cycle of 10 seconds. The machine reports the average wattage of each second. ...
Math's user avatar
  • 3
-1 votes
1 answer
400 views

Converting measured S-parameter to Z-parameter does not match the Z-parameters measured on the same circuit

I have measured the S-parameters for a 4 port circuit. For a certain frequency those values are: ...
Hol Wi's user avatar
  • 1
1 vote
1 answer
300 views

How to convert the outputs from the AD8232 ECG modules back to the raw ECG millivolts (mV)

I have been working with the AD8232 ECG modules for a while now and I am trying to figure out what the raw ECG outputs from this module correlate to. I cannot seem to find any information from their ...
Dev_Engineering_'s user avatar
0 votes
3 answers
197 views

Mapping different resolution ADC to DAC

I have a 24-bit ADC that is controlled by an FPGA. I want to take the ADC input and output it from a 16-bit DAC that is also controlled by the FPGA. Do I simply ignore the 8 LSB bits of the data and ...
Shannon's user avatar
  • 379
2 votes
3 answers
439 views

How do electronics (like transformers) convert high voltage, low current to low voltage, high current, and vice versa?

I am fairly new to tinkering with electronics/electronic-adjacent ideas and I have been wondering: how do electronics get the desired voltage/current to operate properly? I understand in AC power, ...
Shadowskull's user avatar
0 votes
1 answer
278 views

How to convert the outputs from the MAX30003 and/or AD8232 ECG modules to millivolts (mV)

I have been working with the MAX30003 and AD8232 ECG modules for a while now and I am trying to figure out what the raw outputs from both modules correlate to. I cannot seem to find any information ...
Dev_Engineering_'s user avatar
2 votes
0 answers
511 views

Converting mains powered monitor into DC

I have a DELL P2212H LED backlit monitor which runs on mains voltage. The power supply is internal. I need to run this from a 12V DC supply. The main transformer has 3 outputs which goes through 3 ...
dbombuwala's user avatar
-1 votes
2 answers
270 views

Converting square wave into a sine wave [closed]

I am trying to convert a 1 MHz square wave into a sine wave of the same frequency. What's the best way to achieve this?
RafaelCachetas's user avatar
2 votes
1 answer
2k views

STM32H7 ADC Baremetal - ADC not ready - ADC no conversion

I am trying to make baremetal ADC driver for following development board STM32H723ZG Nucleo (144 pins). Reference manual: STM32H723 Reference Manual Datasheet STM32H7xx Nucleo Datasheet To simplify, ...
Aljaz Jelen's user avatar
0 votes
0 answers
729 views

100Base-T1 to 100Base-TX conversion

I am trying to convert from Fast Ethernet to Automotive Ethernet (and vice versa). I believe I have verified a solution and if someone can confirm, I would appreciate it. I believe I can just connect ...
bchang32's user avatar
  • 111
1 vote
1 answer
537 views

How to relate resistance/reactance to parallel/series equivalent circuits?

Problem 7A of The Electronics of Radio asks the reader to find the relationships between resistance and reactance values in any arbitrary series/parallel circuit and their counterparts in a parallel/...
Architect's user avatar
  • 135
-2 votes
1 answer
1k views

Converting battery powered LED lights to AC power [closed]

I have 8 LED decorative pieces that are powered by 4 AA batteries each. Each piece has a control board for different light patterns. Since it's expensive to operate these devices by replacing the ...
Noel J's user avatar
  • 11
-1 votes
2 answers
147 views

AC signal combination

I have a question about combining two AC signals into one. For my project I need to convert stereo audio to mono audio. For the conversion I used this circuit: I made this simple circuit on my ...
Randy Peeters's user avatar
1 vote
3 answers
310 views

Mathematical conversion of hex to decimal

I am stuck with a very trivial coding issue. Please refer the link below: Cordic Algorithm using Verilog By what mathematical rule hex 26dd2b6a is equal to 0.607252935008814?
sarika's user avatar
  • 21
1 vote
0 answers
159 views

USB B to C Receptacle Wiring

Hi I am working on a project and my PCB needs to convert from USB 2.0 to a USB C receptacle. Is this wiring correct? I am using this 14 pin USB C receptacle https://datasheet.lcsc.com/lcsc/...
djjsasff ahshshhd's user avatar
0 votes
0 answers
61 views

Adapting NP-F 7.4-7.2v to 6-6.3v for old camcorder power (JVC GR-AX280)

So my first time posting I have a JVC GR-AX280 that has a 6v to 6.3v DC input range at 1.8A. The goal is to adapt future proof NPF style 7.4-7.2v batteries via a mount adapter as its format of ...
Harrypm's user avatar
1 vote
0 answers
40 views

□ -> X Conversion

In cicuit analasys to make a circuit easier you can use delta wye conversion. This means that when there part of a circuit with 3 nodes, where each of the 3 resistors ar in betwen 2 nodes, this can be ...
Arlindi Frakulla's user avatar
0 votes
2 answers
106 views

Creating a wire break alarm exclusively with surface mounts

Also called wire cut circuits, alarm circuits, etc. Basically a circuit that, when a wire loop is cut sends a signal out like a NO switch being pressed. I've made them before and it's mostly going ...
Andy Tampir's user avatar
4 votes
4 answers
4k views

How to convert leds from AA batteries to a DC source

I have 2 strings of 100 white LEDs each that are powered by a battery pack of 3 AA batteries for each string. What I would like to do is use one of my low voltage power supplies that are typically ...
LSNerd's user avatar
  • 41
7 votes
3 answers
2k views

Converting 3V3 PWM to 5V analog

I want to convert a 3V3 PWM (10 kHz) signal to a 0-5V analog DC signal using transistors only (no DAC), if possible. The output logic should be non-inverted, i.e. 0V->0V and 3V3->5V. The time ...
Bip's user avatar
  • 719
0 votes
1 answer
133 views

How to properly connect a USB-C 2.0 plug to an FT230XS module?

I am coming to you for advice and I also need your help. I am working on a motor control board and for the debugging side I use a USB-C 2.0 connector and a module from FTDI, the FT230XS. Here is my ...
Kolia's user avatar
  • 55
1 vote
2 answers
224 views

Will this step up converter solve my problem?

For a project I am doing at home, I need to convert a 5V digital output from an Arduino to a 12V digital output to power a motor. A solution I found for this is using a step up converter. The step up ...
MesteTech's user avatar
-2 votes
1 answer
450 views

Why do we write the integer part from top to bottom and not the other way?

While converting the fractional part of a decimal number to another number system, why do we write the integer part from top to bottom and not the other way? Since the fractional part is 0, the ...
Anshul Gupta's user avatar
0 votes
1 answer
310 views

I use the NUCLEO-L476RG board. ADC runs at 64 MHz and ADC has a 5.33 Msps maximum conversion rate with full resolution

I need to take 10 samples (10 Hz) per second. How can I set ADC configurations on CubeMX. I use the lowest sampling time (2.5 cycles), but the values I convert and use in ADC change very quickly. ...
uğurcan akdemir's user avatar
0 votes
0 answers
103 views

Can I have some help compacting this?

I am trying to build a transistor computer, and I want to save as much resources as possible. However, I also want it to be practical, so I am implementing a binary-decimal conversion. In order to ...
Nip Dip's user avatar
  • 281
1 vote
1 answer
53 views

Crank angle during cycling conversion

I work in a laboratory, and we are performing experiments on a cycle ergometer, during which we would like to deliver magnetic stimulations during cycling exercise. To do so, we need to know the angle ...
Lightwelter's user avatar
0 votes
0 answers
139 views

4-20 mA analogue signal conversion to flow rate

I have the following control setup: For that, I have data recorded for every I/O block, and I am asked to determine the function used by the AIN block to convert from an analogue 4-20 mA signal to a ...
HWIK's user avatar
  • 1
0 votes
0 answers
251 views

200Ah battery for a 500W mini ITX PC

I want to make a project that allows a 500 watt PC to run on batteries for 4 hours, so it can be worn by an individual on their back. I found the below calculation to get the capacity of the battery ...
Captain Comedy's user avatar
0 votes
2 answers
12k views

how to convert/calculate \$\text{kJ}/\text{m}^2\$ to \$\text{W}/\text{m}^2\$

I have some solar radiation data that comes in \$\text{kJ}/\text{m}^2\$. These data were formerly available for download in \$\text{W}/\text{m}^2\$. I tried to find some ways to do the conversion from ...
Dex's user avatar
  • 1
0 votes
0 answers
52 views

Convert Ni-Mh charger's connector from cigarette lighter to USB

I recently purchased a very basic airpump to inflate a mattress. As we will be taking this mattress to a camping trip on a motorbike, we wont have a car cig-ligther socket (12V), only USB 5V. This is ...
ilakarsu's user avatar
0 votes
1 answer
90 views

How to recalculate amperes to amperes/micron (transistor characterstics)

I measured the transfer characteristic of P-type FET (so I have drain current versus gate voltage.) The authors usually present results in μA/μm (microampere/micron) versus V (volt.) Because I have ...
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