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Questions tagged [bidirectional]

Bidirectional implies that a single pathway allows for power or signals to flow in both directions.

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Small 12V DC motor direction

When I connect the power with alligator clips from the 12VDC transformer the motor goes in one direction. However, if I disconnect one of the clips and do not change anything (the same clip goes to ...
canar's user avatar
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-1 votes
1 answer
62 views

How to test potentiometer with 4 In Line terminals [closed]

I need to test 3 identical Claro potentiometers that have 4 In Line terminals, (not 3 together and one elsewhere as others have asked about). These are Claro EPVR/341 potentiometers that are also ...
MickRanger's user avatar
0 votes
1 answer
53 views

Drive two bidirectional MOSFET constellations with the same optocoupler?

I want to create a solid state relay kind of circuit. The plan is to allow signals to pass through when active and not when inactive just like a standard relay. The issue is that I want to do this ...
ErikM's user avatar
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1 vote
0 answers
55 views

Driving bidirectional LED Christmas lights

So I bought a set of 500 lights from Temu and noted that they work at 24 V, with half of them lighting up at one direction of current and the other half when the direction is different. There’s only 2 ...
Joonas Joensuu's user avatar
0 votes
1 answer
129 views

Single Phase Active PWM Rectifier using MOSFET

I am using this H-Bridge Configuration to make active PWM rectification to control the output average Voltage by controlling the Modulation Index. Here is the circuit diagram and the pulses of each ...
Saif 's user avatar
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0 votes
0 answers
102 views

Reverse polarity protection with bidirectional current flow

I'm working on a reverse polarity protection circuit in order to avoid possible damage if the source (a 18650 3.7V battery) is mounted in the opposite direction. The circuit is straightforward; my ...
Filo_Gold's user avatar
0 votes
1 answer
78 views

Bidirectional Coupler from Directional Couplers

new to RF engineering. I want to build a wideband bi-directional coupler because commercial ones are quite expensive. I decided to build one from two wideband directional couplers (SEDC-10-63+). ...
0xb16b00b5's user avatar
0 votes
1 answer
61 views

Help with relays and spot switches

I’m working on a shuttle bus and need help wiring the doors to open and close with the limit switches acting as stops (all the way open, and all the way closed). Stupid me cut out the old wiring, ...
Michael Kisner's user avatar
1 vote
1 answer
109 views

Bidirectional DC-DC conversion between two low power rails

Problem Statement I have two power rails: 3V and 12V. Both of them have variable loads (e.g., microcontrollers, motors) and power sources (e.g., solar cell, battery) on them. The typical max current ...
Jounathaen's user avatar
0 votes
0 answers
32 views

How to eliminate internal circuit current consumption from the measurement in bi-directional current measurement circuit?

I am comparatively new in this domain. I am trying to design a bi-directional current measurement circuit. This is a 5V to 9V DC system. I have two USB C female ports at both ends. Which means I can ...
Sakhawat Fahim's user avatar
2 votes
4 answers
746 views

Need an explanation of how the circuit works

I came across this bidirectional switch circuit by Texas Instruments. I know how two MOSFETs configuration works but when I apply the pulse to turn it on and off the NMOS but it does not change its ...
Shamurov's user avatar
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1 vote
1 answer
253 views

TXS0102 level translator, problem connecting to external lines outside

I have a TXS0102 bidirectional level shifter connected to some external lines (RJ45 connector with cat 3 cable). The external lines have too much capacitance and it prevents the level translator from ...
Voltage Spike's user avatar
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0 votes
1 answer
146 views

MOSFET conducting even when no gate signal applied in bidirectional bipolar switch arrangement

I have a circuit as shown here and the expected waveforms are shown besides. When iL>0, the mosfet Q1 and diode D2 conducts the current and vice versa. I see in the practical circuit ...
Rohan Burye's user avatar
0 votes
1 answer
148 views

On Chip Peripheral Emulation - How to accomplish communication with an emulated peripheral that relies on bidirectional signals in between?

I recently asked some questions for an application in hope to gain more clarity on how to accomplish an emulation of an input device peripheral (in my case an input mouse) in simulation. Following ...
Vahe's user avatar
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1 vote
1 answer
43 views

How to isolate the AM2301 sensor with a small footprint and low-cost isolator (digital or opto)?

Looking for a solution for isolating the AM2301 sensor with either digital or opto-isolator. I have space and cost constraints. Thank you . AM2301 is accessed via a single bus / single line interface ...
user14665305's user avatar
3 votes
3 answers
485 views

Bidirectional TVS in 12 V DC

I understand that bidirectional TVS diodes have no polarity and can be used to limit positive and negative swings in an AC application. Is there a down side to using bidirectional TVS diodes in 12 V ...
Max's user avatar
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0 votes
1 answer
45 views

Ripple problem when using a type III Compensator for buck boost converter

I need your help, and from my last question here, I understand I need a closed-loop for my design, which helps to reduce the output overshooting. Below is the plot. From the plot you can see my ...
ikenna's user avatar
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5 votes
0 answers
338 views

Bidirectional flyback converter design

I see a fair amount of questions on here about designing flyback converters, but I don't see any about designing a bidirectional DC/DC flyback converter, such that either side can be the primary and ...
orangeandblack5's user avatar
1 vote
1 answer
61 views

Telegraph circuit confusion

I know little about this stuff, but I bought two old telegraph keys and two sounders. They polish up beautifully. I’d like to get them working in two remote locations in my house. Each location will ...
Frank Enstine's user avatar
0 votes
0 answers
48 views

Issue from my buck/boost converter

After my simulation, I am getting this in my output, which does not look good at all. I find it difficult to find a spice model for DC/DC isolator that can give me a positive, negative supply, and ...
victor_uk's user avatar
2 votes
1 answer
625 views

1 wire to 2 wire bidirectional UART

I'm working on diagnostics program for my old GM diesel, the old GM diagnostics uses a 1 wire bi directional serial protocol, 5v HIGH, 0v LOW, with the PCM data line being held high when idle, and the ...
dbtech7's user avatar
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0 votes
0 answers
89 views

MOSFET heats up quickly in High power 14V DC-DC bidirectional charging circuit

I am currently design the following circuit to charge a 14V LifePO4 4 cells battery while running a high power motor at 14V 24A. There are some issues that I am currently facing: Without any diodes ...
Ricochet3004's user avatar
0 votes
1 answer
3k views

Using bidirectional optocoupler instead of two identical optocoupler

I have two types of PNP & NPN proximity sensors and intend to use one connection socket for both types. I design a circuit with two normal optos for each line however to save the parts and space I ...
Hamid s k's user avatar
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0 votes
1 answer
545 views

(Update)Using a bidirectional optocoupler for attaching any PNP & NPN sensor type [duplicate]

I have two different 12 V PNP & NPN proximity sensors. My first design was for each sensor type, having an identical PCB design with a normal optocoupler with a dedicated wiring arrangement. My ...
Hamid s k's user avatar
  • 343
2 votes
1 answer
480 views

Bi-directional Line Termination using series resistor (s)

I am designing a PCB for an ST micro MCU with external SDRAM. On the demo board, ST is using one(1) series resistor termination for the bidirectional data lines. ST places this resistor at about 30/70%...
MatAEM's user avatar
  • 21
0 votes
1 answer
126 views

Bi-directional Three State IO and microprocessor gpio

I want to use an MP5010B Electronic Fuse IC. I will enable or disable it by using the Enable/Fault pin which is billed as a bi-directional three state IO. I will enable or disable this pin using a ...
gmlux's user avatar
  • 33
6 votes
1 answer
329 views

A simple analog neural network to implement the XOR operation

I am reading this paper and wanted to replicate some of the results as part of a learning process. I'm more of a digital guy but obviously have had some analog design as part of my studies. ...
Leonhard Euler's user avatar
4 votes
1 answer
3k views

Two directional FET switch. Is it possible?

Is it possible to have a high side MOSFET switch that will allow any direction of current? I was trying to design one but without the success. Or should I use a relay?
0___________'s user avatar
  • 2,594
2 votes
1 answer
213 views

Is there a simple IC for disconnecting a power source?

I'm looking to create a simple circuit to connect/disconnect a power storage capacitor to/from a larger circuit. In the model railroading world, we use capacitors as "keep-alives" to keep ...
uknowit90's user avatar
0 votes
0 answers
284 views

8-bit quasi-bidirectional I/O port

The schematic attached is from a very old device. It's using the microcontroller SAB 80535. According to the datasheet P5.7-P5.0 is an 8-bit quasi-bidirectional I/O port. There's a keyboard, a LCD and ...
Blue_Electronx's user avatar
0 votes
1 answer
264 views

Digital isolator says it is bidirectional but its block diagram does not follow that statement

I am wondering if ADUM1285CRZ is Bidirectional or unidirectional digital isolator. It says it is Bidirectional, but the block diagram says otherwise. Tha datasheet block diagram shows one direction ...
Christianidis Vasilis's user avatar
1 vote
1 answer
35 views

Analogue switch TS3A475 does the direction matter?

Does the "direction" of the signal matter? signal is 1/3Vcc to 2/3Vcc
0___________'s user avatar
  • 2,594
0 votes
1 answer
131 views

Bi-directional on/off toggle soft power latch

I need a one-button on/off toggle power latch to connect/disconnect a 36V battery to two VESC-controlled 500W motors with regenerative braking. Most of the designs I found for soft latching circuits ...
Azial's user avatar
  • 1
0 votes
1 answer
1k views

3.3V to 5V logic level shifter with 3.3V microcontroler board and 5V arduino sensor

I would like to use logic level shifter like the one above. 3.3V logic level would be connected on NodeMcu 3.3V microcontroller board pin, while 5V level would be used for Arduino sensor. What ...
moci's user avatar
  • 97
0 votes
1 answer
186 views

Bidirectional buck boost converter [closed]

I am searching for a bidirectional buck boost converter evaluation board for charging and discharging the batteries. Input= upto 30V DC Output= upto 10V to 20V DC Current= less than 10A I always ...
Kranthi Kumar Banala's user avatar
0 votes
1 answer
251 views

VFD Motor Bidirectional Control

So I have a control panel which controls the speed and direction of a motor in a sliding mechanism. the direction can be inverted using a tri-state selector on the panel. the selector input is a ...
ahm_zahran's user avatar
0 votes
0 answers
674 views

Common Source vs. Common Drain for N-Channel Switches

Most discrete load switches I have seen (Using N-Channel FETs) have been in the common-source configuration. What, if any, are the operational differences between this and the common-drain ...
Tim Vermilyea's user avatar
1 vote
2 answers
1k views

How to control the non-isolated bidirectional buck-boost converter?

I have been working on a control software for below given bidirectional buck-boost converter. The planned usage is for charging and discharging of a traction battery in electrical vehicle. I am not ...
Steve's user avatar
  • 1,113
0 votes
1 answer
1k views

Power factor down after solar connection

We installed solar plant in factory. After that power factor goes down to 0.16. Normally it never goes below 0.85 in history even if we keep APFC off. We always maintained it to 0.99. Note - Main ...
Avinash Gunjal's user avatar
-1 votes
1 answer
449 views

SMD potentiometer direction

I currently struggling with a circuit and trying to identify the parts which may cause the problem. The circuit needs a trim potentiometer. Mine looks like with the symbol Does the direction have ...
v3xX's user avatar
  • 415
4 votes
2 answers
309 views

Bi-directional electronic switch for external circuitry

I am in the process of designing a PCB that is powered by a 10V / 1mA supply from a fandeck (incorporating EC/DC fan motors). One of the functionalities include having continuity between 2 pins on ...
NeuroEng's user avatar
  • 480
2 votes
3 answers
1k views

How does an auto bidirectional voltage translator work?

I'm trying to understand how the auto bi-directional voltage translators work. Background: I have to choose a part that can translate signals in both ...
not2qubit's user avatar
  • 414
1 vote
1 answer
3k views

How to make a bidirectional power switch for negative supply rail controlled from logic level MCU

I'm looking to build a bidirectional power switch for a negative power rail. I have a +12V, +5V, +3V3 and -5V supply to switch. For the positive supplies, I'm using two P-channel mosfets in a common ...
Arjo van der Ham's user avatar
1 vote
1 answer
408 views

Question about bi-directional pin from Roth reference

I now am studying the tri-state buffer from the reference "Fundamental of Logic Design", 6th edition, By: C. H. Roth and L. L. Kinney. I found that circuit of a bi-directional pin as application of ...
Osama El-Ghonimy's user avatar
1 vote
2 answers
1k views

How to find a truly bi-directional level shifter?

I'm trying to create an interface PCB to a 32 channel USB GPIO device which has 3.3v IO, and I want the flexibility to use 1.8, 3.3 or 5v - across all pins, or at most in 2x banks of 16 - I don't need ...
PeterBelm's user avatar
  • 113
1 vote
1 answer
58 views

DC Motor Controller: hacking it bidirectional?

I just picked up two of these DC motor controllers (https://www.amazon.ca/Controller-Yeeco-Universal-0-01-1000W-Generator/dp/B00RZ97DDQ/ref=sr_1_10?dd=1QzB1w0bE3cxmYrmXew-NA%2C%2C&ie=UTF8&qid=...
David Ferris's user avatar
0 votes
1 answer
92 views

Can I use TXB0104B bidirectional level shifters on the Intel 8085 NMOS CPU buses?

I want to connect an old Intel 8085 CPU to an FPGA board. The basic issue is that the 8085 works at 5V while the FPGA will not accept any voltage avobe 3.3V so I decided to use the TXB0104 / TXB0108 ...
NeonMan's user avatar
  • 399
0 votes
2 answers
430 views

state-space model for bidirectional buck-boost with input capacitors

I'm having some trouble simulating the behaviour of a bidirectional buck-boost converter for battery charging purposes. The circuit looks as follows: I would like to create an averaged state-space ...
borizzzzz's user avatar
  • 113
2 votes
0 answers
297 views

How can I size the current ripple of a DC-DC converter for lithium batteries

I am designing a bidirectional DC-DC converter to charge and discharge batteries on a DC bus. The power of this converter is 50 kW and the average current in the inductor (the same as that on the ...
Storage's user avatar
  • 21
0 votes
1 answer
2k views

bidirectional buck/boost converter vs separate buck and boost converters

I have recently leared about bidirectional buck/boost converters. They can be used in hybrid vehicles for optionally charging a 12v battery from a higher voltage battery or vice versa. How would one ...
Westin's user avatar
  • 15