Questions tagged [24v]
Deprecated tag. Do not use in the future.
129 questions
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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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How to convert a digital signal from 24V to 5V
I have an industrial automaton that gives me a digital signal (24V or 0V) on its outputs and I want this signal to control an integrated circuit, but the integrated circuit only takes a TTL signal in ...
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2
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24 V transistor switch acting strangely
I am working on a project to switch a spring-applied brake (datasheet, page 84, MCNB 2GR) using a Teensy 3.5.
I only have limited electronics knowledge and am struggling with weird behaviour from the ...
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Toggle flip-flop for voltage higher than logic levels
I need a T flip-flop for 24 V. The purpose is to take a 24 V, 50% duty cycle, 0.5 Hz pulse wave and halve its frequency to 0.25 Hz, so that the output wave toggles between 0 and 24 V at the input's ...
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How to power a 24 VAC pump with 24 VDC?
I want to power a 24 VAC vibration pump (48 W 50/60 Hz, often used in coffee machines), and control it with a microcontroller. I've got an existing system that is powered with 24 VDC. A standard DC-DC ...
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4
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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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2
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TVS2201 clamping diode failed at 27 V
In the development of ESD protection and reverse polarity, I encountered a problem. The circuit is supposed to prevent reverse polarity (it does, we tested it).
During testing, I applied a voltage of ...
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How to generate a -24V signal
I have to interface a specific motor, it has a weird driving board, I was in contact with the technical team from the manufacturer, and they told me that I have to send a -24V on a pin to allow it to ...
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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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1
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Wide voltage range input regulation (24V - 3.3V)
TL; DR: I need a circuit capable of handling input voltages from 24V to 3.3V (with a 10mA/5mA maximum current) and delivering 3.3V to the microcontroller (ESP32) input.
Recently, I've been working ...
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3
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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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Keep Relay Closed for 10 ms after electricity stops
I have a non-latching relay and I provide a voltage (24V) to close the relay. However, I want to keep this relay closed for 10 ms after I stop providing the 24V needed to close the relay. The relay is ...
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PWM Dimming 24v with 3.3v input
I am trying to dim a 24v led-strip with a 3.3v PWM-signal coming out of a ESP32. Currently I have this circuit:
But there is one problem. It works for dimming till ~40%. But when I turn the PWM off, ...
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Can I Run An Appliance From a 24v Battery?
First, a little backstory. My wife is planning to operate a booth at some craft fairs and we require power for a piece of equipment (Silhouette Cameo, a computer controlled vinyl cutting machine). We'...
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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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Input of 20~23v, need output of 24v [closed]
I have a supply that outputs either 20v or 23v, I need to step that up so it is always a fixed 24v no matter what. How can I make sure it is always a fixed 24v?
Edit: This is for a coin hopper. It ...
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Alternator output rating
Overview:
I am currently working on a project that requires a 24v alternator, which is powered by a mower engine.
This engine in particular runs around 3,000 RPM, and does not exceed 3,200 RPM (based ...
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2
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2
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Voltage drop @24V2A using a MOSFET with Arduino
I'm not really good with electronics but i'm really trying to learn as much as i can, so please have mercy on my question :)
Hardware
So, i have an Arduino Uno, a 24V 150W power supply, a 24V 48W LED ...
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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 ...
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2
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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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2
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1
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What size should I select for the resistor? I have led and SSR and 24VDC source [closed]
Could you please clarify this circuit with me? I have selected 90 ohms. Please let me know if I need to do something differently here.
R=(24-30.3)/20mA= 1035ohm and I select 1Kohm
I appreciate any ...
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Wiring a simple 24v DC light on an output terminal on a PLC
I am using a Micrologix 1100, part number 1763-L16BWA. I have been able to get the input side working, but can’t seem to figure out the wiring for the output side. I also have an 1762-IQ8OW6 extension....
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1
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How can I use 24V DC input for Arduino digital pins?
In this circuit, switches should be connected to 24V DC and arduino pins should check whether switches are on or off to control led behaviour. I don't know how to use 24VDC for this situation. I would ...
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2
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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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4
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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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3
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How to power a 24V 2.5A DC motor with a switching power supply?
I need to power a windshield wiper motor at 24V. Switching mode power supply shuts off.
The motor, rated 50 W, runs at 12V (50 RPM) or 24V (110 RPM). It's exactly the same one this guy has in this ...
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4
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What can happen if 24vdc is applied to an Ethernet port?
We have a device with two RJ45 ports. One of these ports is for receiving 24vdc on pins 7(-) and 8(+) to power the device. The other RJ45 port is an Ethernet connection. The ports are of course ...
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2
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Does a 220V AC fan emit much more EMI noise than a 24V DC fan?
I've been discussing this with other colleagues for some time now and we can't reach a conclusion. Also searched on internet but didn't find a good article or proof that in fact a 220V AC fan will ...
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1
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230V AC to 24V AC Transformer Wiring (Black, Red, Brown, Brown)
I'm setting an irrigation controller and I need a 24V AC source to switch the irrigation solenoids.
Since I have 220V AC, I asked the electrical store for a 220VAC to 24VAC transformer and they gave ...
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1
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615
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What's the benefit of 24V over 12V in solar and charging?
What are all the benefits of 24V solar systems over 12V solar systems in regards to solar panels and battery charging?
All I've been able to find is that you can use smaller gauge wire with 24V, ...
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1
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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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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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2
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parallel connecting 24v 1500mah NIMH battery packs and how to charge
After several of searches on the internet for information about charging NIMH batteriers, i feel the need for some clarification. I've gotten my hands on a bunch of battery packs. Each battery pack is ...
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1
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656
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Mini 360 DC Buck Converter [closed]
I have bought several DC Buck converters for my home-made 3D printer. I'm running a 24V PSU, but my fans are Noctua (12V) ones. So i want to convert 24V down to 12V. And the Voltage output works fine. ...
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1
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409
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24v to 12v truck cigarette socket wiring
Hi guys i have a aerpro 24v to 12v reducer, but it has a positive a negative and an earth wire i need to wire it up so i can plug it in to a 24v truck socket and then have the 12v going to a cigarette ...
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2
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How to approach controlling multiple sets of solenoid valves?
Please excuse me for asking basic questions as I am a newbie in this field and learning as I go.
I have a project that requires simultaneous functioning of two solenoid valves. I require three sets of ...
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2
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Can I charge my two large 12 V bus batteries that add up to 24 V together with a a 12 V solar panel?
Just wanting some way to charge my bus batteries while parked for a long amount of time besides a battery charger. But am having trouble figuring out what kind of solar panel to get.
My bus batteries ...
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1
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129
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Unexpected (too low) power consumption for a 24 V 1 meter LED strip
I have a LED strip configuration that basically works, but when measuring something doesn't add up.
The strip is 1 meter, 60 LEDs (SMD5050), 24 V, claimed as consuming 15 W per meter. When I google ...
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2
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549
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Non-inverting switching 24 V with 3.3 V signal using a MOSFET
We have a reset circuit used in a peak-hold amplifier. Under normal conditions, a capacitor on the peak-hold circuit is grounded by RST1 (see circuit).
P0-0 is a fixed 24 V voltage from the supply.
...
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1
answer
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Diode OR or transistor OR circuit?
I need a circuit that converts a 3.3V signal into a 24V signal. But I also need to be able to activate the 24V signal using a PCB switch. I can do it in two ways, using a diode OR or using a ...
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Using ESP8266 to read digital input pin to be notified when motion is detected from 24VDC source device
Software developer here, trying to mess around with hardware (VERY NOVICE) and implement neat things around the house using ESP8266s and Arduinos.
I have a commercial wall plug that is activated when ...
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1
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633
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5a 24v mosfet h bridge to power solenoid
I created a mosfet h bridge based on the design from bristolwatch.
I'm using it to power a solenoid (that needs +24v or -24v to open/close a valve). If I connect the solenoid directly up to my ...
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1
answer
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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1
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76
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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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1
answer
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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
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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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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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
answer
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Arduino can not drive a BJT connected to a relay
I'm trying to make a simple 24V relay driven by an Arduino Leonardo as per the following picture:
The Arduino code simply toggles the output every 2 seconds. When I measured the pin voltage alone, ...
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0
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91
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LED circuit with an AL1793
I'm currently making my own light fixture, a multicolor Par light to be exact (and a few other types once this is successful). Now I'm trying to control a string of 6 multicolor LEDs. The circuit will ...
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