Questions tagged [redundancy]

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21
votes
3answers
5k views

Dual-SIM phone, do they use 2 GSM modules ? Anyone has high level schematic?

As an slight extension of my project, I am trying to see if I can improve connectivity resilence by using a dual-SIM approach. Dual-SIM phones (or Tri-SIM, quad-SIM phones) are quite popular in many ...
9
votes
1answer
708 views

Yields in DRAM and other Massively Redundant Processes

I'm right now combing the electrical engineering literature on the sorts of strategies employed to reliably produce highly complex but also extremely fragile systems such as DRAM, where you have an ...
5
votes
2answers
292 views

Operation without power: Passing analog video

Okay, the title sounds odd, I'll admit. I need my project to work without power. That is, a complete power failure may happen, and no additional power (such as a battery or supercap) is available ...
4
votes
3answers
9k views

Two identical DC power supplies in parallel for redundancy?

I'm trying to design a power backup system for my saltwater aquarium. In short, the system will be powered by a 12VDC power supply while the mains power is on. On power failure, the system will ...
2
votes
3answers
738 views

Triple Modular Redundancy w/ Majority Voting when a microcontroller fails

In a simple majority voting system, the majority input values will be the output, as shown below. (source: 6502.org) However, how does one deal with scenarios where one or two microcontroller fails? ...
2
votes
1answer
662 views

How to create a triple redundant clock tree in FPGA manually?

I am exploring a range of techniques to implement TMR clock trees as part of a global TMR design (all resources including i/o pins, clock trees, reset trees, logic and registers are implemented with ...
1
vote
2answers
9k views

Using a relay to switch between 230VAC inputs

I have two mains power inputs (in case one fails, the other is likely to still work), but the device only has one power supply, so I decided to use a relay to switch between the inputs (the device ...
1
vote
2answers
4k views

Automatic transfer switch VS Using a Reversing Contactor with Circuit Protection

We have a an industrial control system that utilizes a 480VAC 3 phase 10 Amp service. For redundancy reasons, we wanted to add an automatic transfer switch to the system to switch between two ...
1
vote
2answers
1k views

How to do redundancy for a DC/DC converter? So that if one of the converters fails the other gets switched on

I have a DC/DC converter that gives 3.3 V output.In our system it is the most important part.So we need a redundancy for this.So that if one of the converter fails the other should automatically get ...
1
vote
1answer
149 views

using double powersupplies

I have 2 computers (home PC's). Both are connected to the internet through a router/switch. The router is always powered, regardless when one (or both PC's) are going standby. Idea is, to power the ...
1
vote
0answers
44 views

Majority Voter for complex data

How is a majority voter for complex data implemented? If there is only one integer value which should be compared you can use a discrete circuit but how does it work for multiple datasets and floating ...
1
vote
0answers
183 views

How can I add redundancy to the flyback diode protection across an inductive load?

Dear StackExchange users, I want to add redundancy to a flyback diode system that is protecting an N channel MOSFET from flyback of an inductive load but I don't know how to accomplish this! I am ...
1
vote
0answers
97 views

Redundancy in power supply [closed]

How is redundancy of power supply from converters done in satellites? can anyone explain with complete details.Is it possible to get the actual design from power system of any mini-satellites ? Is the ...
0
votes
2answers
121 views

redundant output pins from MCU

I am analyzing a board with safety considerations. In one part of the circuit, PB0 and PB1 of MCU have been logical anded using an IC (PB0 && PB1). Does anyone have faced with such ...
0
votes
3answers
212 views

Redundant DC-DC converter (parallel)

I am building a flight computer for a sounding rocket. I want to include redundant power supplies - in other words: parallel DC-DC converters. What do I need to consider in order to do this? (is my ...
0
votes
1answer
190 views

Fuses in redundant PS system

Are the fuses required for a redundant power system, which takes power from a battery? If yes, how to calculate the characteristics? I am trying to isolate the faulty PSU, not the load. Load must ...
0
votes
1answer
817 views

Can one battery bank be connected to two static UPS devices?

To make a redundant static uninterruptible power supply (UPS) configuration such as pictured below, I have seen warnings in UPS manuals that each UPS is to be connected to its own battery bank. But ...
0
votes
1answer
37 views

redundancy checks and protection on monolithic and MMICs

I am using the ISL8026A chip for voltage regulation from 5 to 3.3V. The datasheet is - datasheet. Now, this is merely an example circuit. Now, I would like to design a power supply for a hi ...
0
votes
0answers
31 views

Redundant power supply out of two Recom RAC20-05SK

I know that there are plenty of questions regarding redundant power supplies, but mine is a little bit special: I am building an IoT Device running on 5V 4A DC and I am planning to use the Recom ...
0
votes
1answer
179 views

Low cost power supply redundancy

I'm looking at coupling the output of two computer PSUs, driving a fairly stable high power project (around 300-400W peak) most likely using all output rails (12V, 5V, 3.3V) all well within the rated ...
0
votes
2answers
107 views

Share same input with 2 different 32AVR Microcontroller

I'm developing a circuit with two warm-redundant micro-controllers. Each uC has to read I2C, analog and digital signals from the rest of the circuit. Should I route the signals directly to the two ...
0
votes
2answers
408 views

Failover Management from AC to DC and DC to DC

I'm working on a project that has a high availability requirement. As such, I must maintain a power supply output of 12vdc ~1a (ideally 13.5vdc ~35a). The 1a option will sustain the core equipment, ...
-1
votes
3answers
327 views

Why triple output in every 230v -> low voltage DC power supply? [closed]

Why do all 12v power supplies produce triple output? All power supplies that I see at Amazon www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=12v%20power%20supply%2030a or ...
-1
votes
1answer
158 views

Redundant system question

so in short. I am building a redundant system of multiple atmega micro controllers. The way it works is that they are all connected to a single bar, when the system is booted, the first micro ...