Questions tagged [24v]
Deprecated tag. Do not use in the future.
129 questions
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relay coil issue
i've been googling my way through a problem and now i am stuck and haven't found an answer.
So here is what I am trying to do. i have 24vdc connected to the positive side of the coil on a relay and ...
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1
answer
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0-5V PWM to analog 0-24VDC voltage with MOSFET
Im having trouble understanding how or if it even is possible to regulate a voltage with a MOSFET. I want to regulate an output voltage of 0-24VDC 0.5A(continuosly) with the duty cycle of a 0-5V 1kHz ...
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1
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658
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Transient Voltage Protection of an automotive circuit
Im an electronics engineer student, and im doing a project where im designing a circuit which will be used in automotive applications. More specific it contains a PIC controller which has 16 digital/...
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2
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35v reading on 24v transformer
im troubleshooting a 24v ac transformer hooked to two doorbell circuits and on one of them I am getting a 35v reading. What could be causing this?
I am reading the voltage using a standard (cheapo) ...
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2
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3
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357
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Industrializing a PIC micro-controller
I want to replace some timers with a PIC16F887 micro-controller. The problem is that the input voltages to the I/Os is going to be 24V which is too much. For the output part I was thinking about using ...
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2
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4k
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Running a 24V motor on a 12V boat system
I'm trying to design a jigging machine for a fishing boat, using a RaspPi as the controller. (A jigging machine jerks a 1kg lure up and down near the sea bed, and pulls in a fish when it's hooked.)
...
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2
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2
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1k
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Why is there a resistor in this reverse-polarity-protection circuit?
I was looking at the recommended reference implementation for a particular integrated circuit (the TI SN65HVS880, data sheet here). It runs off of a 24 volt power supply. The circuit diagram looks ...
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3
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2k
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Switch to stay ON until power removed (24V)
In my bathroom, I would like to install some 24v LED tape, some in a warm-white and some in a cool-white, that I can switch between at will. IE: I will turn on the circuit from the wall-mounted dimmer ...
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1
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1
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Remote switching in rural village
How might we control a 2" valve >2000ft away in a remote village. We're thinking that we power the system with a 12 v or 24 v solar powered/ battery backup. The spot in the village with line of ...
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3
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476
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How to determine the maximum power required by given devices? [closed]
I need to power 4 devices with these power input specs:
...
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272
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Connecting two PSU's in series
Good day,
I found this question asked before (not exactly this) but the answers were wrong (at least at some level).
So i have two 300W PSU's (different manufacturer so different schematics too). I ...
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2
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2k
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Alber E-Motion M12 power assist: materials required to convert NiMH rechargeable 24V/6Ah circuit (20 C-cell) to Li-Ion rechargeable circuit
Below is a picture of a battery shell for a NiMH circuit for a power assist wheelchair battery. I'm taking a guess that each of the 20 batteries is 1.2V because the entire circuit is 24V. These are ...
- 335
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1
answer
1k
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24V proximitiy switch, NPN transistor, Arduino interrupt input
I build circuit which take proximitiy sensor as input to circuit (24V). With this 24V we switch on and off NPN transistor.
On the side is Arduino with interrupt enable when pin is LOW. So I need ...
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1
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1
answer
340
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Arduino Ethernet shield
I have some problem with Arduino and Ethernet shield.
I have a small project with Arduino. Sensors send data to webserver. Everything works fine when arduino getting power from PC usb but when i give ...
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2
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243
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24 VAC source unable to drive servo motor
Here's my power supply (schematic except without the transformer since my source is already at 24 V AC and using a 100 uF electrolytic as my smoothing capacitor):
24 VAC rectifier -> 100 uF smoothing ...
- 285
2
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2
answers
749
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24V power supply for MCU+USB
I'm designing a home automation controller in college. The system is on 24V (relays and sensors). I'm using TI Cortex M3 MCU and i want to control it over USB. This picture of the system is currently ...
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2
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1k
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Calculating peak current of solenoids
I'm a electronics newbie, and I'm making a project with 8 24v solenoids playing percussion quickly. I want to power these all with the same power source, so I'm being careful.
This is similar to ...
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2
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1k
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Can I use a 12V 70A source to convert/boost to 24V 5A supply?
I have a self built custom made computer that is using a Ultra X3 1000 watt power supply. Over the years I have been reducing the power needs by adopting more energy efficient hardware. My computer is ...
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1
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139
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24V failsafe switch that cuts power untill power is removed and reapplied
Does anyone know of a device that when current is applied it will stay on for a certain period of time then turn off until current is removed and reapplied?
Basically I have a float switch that, ...
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1
answer
122
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Can this dimmer really handle 144W?
I was looking for a dimmer to control an LED strip with following characteristics:
5 meters long
14,4W (max) per meter, so 72W in total
24V
I found a dimmer on ebay that says it can handle 144W, ...
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1
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1
answer
474
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24vAC to Multiple DC Supplies
I am trying to put together a power circuit which will take a 24vAC supply to the following DC supplies.
+24vDC (700mA) - Powering DC relays and OpAmps.
+5vDC (500mA) - Powering MCU, Ethernet etc.
+3....
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1
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1
answer
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Driving a load with 1.8V input
I have a Gumstix expansion board and want to make it communicate with some 24V PLCs.
I've read these topics for reference:
1.8V to 5V, still not comfortable with transistors
Transistors: why are ...
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1
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24 to 96V Boost Converter independent from the load
How can i build a boost DC/DC Converter that can boost from 24 to 96V without the output voltage depending on the load?
Why? Because i need to charge a battery system that has already been designed ...
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1
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2k
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Choosing Fuses or MCB in 24VDC vehicle circuit
I am currently designing a 24VDC circuit for a small vehicle. I personally prefer using MCB's since they are simple to reset and easy to detect faults in the system, although i do find it rather hard ...
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1
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1k
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24v brushless DC Driver Pinout
I have some Brushless DC Motors with drivers and I need some help finding the pinout of the drivers.
Please take a moment to view the pictures here, clicking on a picture will show its higher-...
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4
answers
18k
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Simple design to switch 24v from PIC
If I were wanting to drive i.e. industrial relays which require 24v from a Microchip PIC what would I need to look at in terms of a general transistor circuit (and it's pitfalls when driving such a ...
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Can I recharge 12V batteries individually while why are attached in series? [duplicate]
Possible Duplicate:
Charging two lead-acid batteries connected in series, separately (with two solar panels)
I have 12V Solar Panels and 12V batteries. But my laptop needs 17V to recharge. I ...
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4
answers
2k
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How to set a digital out to 24V Vcc
I want a curcuit with 3.3V and 24V supply. The micro will use the 3.3V supply, which needs to be able to set multiple industrial 24V digital outputs.
My plan was a simple op amp, but as far as I know ...
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5
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24V 3A from ATX power supply?
I am looking for a cheap way to get +24V DC max 3A from computer power supply. I prefer easy soldering solution like DIP, and standard components that do not need to be purchased over internet. Any ...
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