Questions tagged [24v]

Deprecated tag. Do not use in the future.

Filter by
Sorted by
Tagged with
0 votes
1 answer
63 views

MAX809S not working with a voltage divider on input

I am trying to get a MAX809S IC to work with a 24 V supply. The MAX should trigger at around 2.93 V at its VCC pin and turn the RESET pin high. Because the MAX is only rated at max. 6 V at the VCC pin ...
FullMetalJack's user avatar
0 votes
1 answer
44 views

HVAC control & Low Voltage Wiring (24v to 10v) [closed]

I am a GC having some exhaust fan control issues I am hoping someone on here can assist with. My mechanical and electrical contractors are stumped as well. We have a Vari-green 2 speed controller ...
Christopher Marshalek's user avatar
0 votes
0 answers
100 views

Running a 3D printer, LED strip, and fan from a 24V PSU

I am working on a project to design an enclosure for my 3D printer. The enclosure is designed, but I am looking for some guidance/suggestions on the electrical side. I plan to add a few strips of 24V ...
Learning4Fun's user avatar
0 votes
1 answer
93 views

24v Electric car kiddie regen brake issue [duplicate]

Looking for some help please. We manufacture small off road Land Rover Defenders for holiday parks and the likes. Up until recently these cars have run off 3x 8v lead acid batteries with a ...
Chris Tunstall's user avatar
0 votes
1 answer
57 views

Can I make a regulated power supply that has two different output voltages?

Can I use a single 24 V, 110 V / 220 V AC to DC universal regulated switching power supply to power two different components? One which requires 12 V and the other which is 14.8 V? I have a project ...
John Stoddard's user avatar
1 vote
2 answers
62 views

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 ...
Jacques Le Roux's user avatar
0 votes
0 answers
52 views

24 V Door Bell Modification

I'm looking to create a custom doorbell and am looking for advice. I am retrofitting a traditional 24 V doorbell system. My output I'm looking to get when you depress the doorbell is 5 short bursts of ...
Jordan Davco's user avatar
2 votes
2 answers
159 views

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 ...
trident_'s user avatar
1 vote
0 answers
53 views

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 ...
RektByMemes's user avatar
1 vote
2 answers
58 views

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 ...
Eliza Smith's user avatar
4 votes
5 answers
2k views

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 ...
empewoow's user avatar
0 votes
1 answer
214 views

24V I/O (PLC) to 3.3V interface with opto and PCF8574

I am more of a software guy, and I want to make sure my design works before sending it off to fabrication. I need to interface with 24V PLC I/Os. I want a simple design for now, as I can add ...
codecarbo's user avatar
0 votes
1 answer
142 views

What is the 2 W resistance in the regulator input for?

What is the purpose of R1 (120 Ω, 2W)? When the voltage drops from 24 V to 5 V, a lot of heat is generated in the 78L05. Put a resister on the 78L05's input. Say we need 5 V, 100 mA output from the ...
KimJiHoon's user avatar
1 vote
0 answers
152 views

Will this 24 V relay driver work?

I am not sure about the 24 V which drives the transistor base. Is this circuit correct? Do I need some modifications? The current rating for D2 is 200 mA. Is that high enough?
PRAMIL WAKCHAURE's user avatar
0 votes
1 answer
70 views

Monitoring 24V LED stack tower lights status

I am working on a project based on Arduino, but currently stuck. I have three 24V lights to monitor, sent by a tower wired to a machine. My idea is to use a relay to convert first 24 voltage to 5V, so ...
user avatar
1 vote
1 answer
125 views

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 ...
andromax's user avatar
1 vote
2 answers
459 views

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. ...
user2668812's user avatar
1 vote
2 answers
495 views

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 ...
Pedro NF's user avatar
  • 265
0 votes
0 answers
386 views

Can a PWM solar charger use a battery as the source?

For background, I am slowly migrating from 12v to 24v, but want to use my existing 12v inverters if possible, by having a 12v battery kept topped-up by the 24v batteries. I have a decent MPPT ...
Justin Maxwell's user avatar
0 votes
1 answer
649 views

I want to control 24V relay with NVIDIA Jetson

I have NVIDIA Jetson Nano Developer. I want to control a 24V relay with Jetson pins but I am undecided on which method to use. (Transistor, MOSFET) The other thing to know is that Jetson pins work at ...
sentago's user avatar
  • 11
0 votes
2 answers
65 views

Replacing LEDs connected to 24 VAC

I need to replace 2 blown LEDs in a keypad module. They are connected in series with a 240 ohm resistor to a 24 VAC supply. What LEDs should I choose? Something with a forward current of 100mA? Do I ...
Andrew Smith's user avatar
0 votes
2 answers
180 views

splitting ground plane

I have a 4 layer board, where I have a 3.3V STM32 and some 3.3V components, and also a 24V H bridge to drive a 24V DC motor. The board is supplied with a 24V DC power supply, the 3.3V is created by a ...
Marcell Juhász's user avatar
0 votes
1 answer
891 views

24V optocoupler with 12V?

I recently picked up a "24V Voltage Level Current Converter Module 80KHz 1-Channel Optocoupler Photoelectric Optoisolator 12V PNP NPN Signal Converter PC817 Optocoupler" Can I supply this ...
ABeardedItalian's user avatar
-1 votes
1 answer
70 views

Looping on/off switch (10 s on, 0.5 s off)

I bought a 24 V shower booster pump, and it has this crazy behaviour that it shuts down after 10 - 12 seconds. When I restart the pump, it starts again for 10 - 12 seconds. It is useless now and ...
Frank Van der Horst's user avatar
0 votes
1 answer
62 views

Identify 3 states at the input - Automotive circuit 24V system [duplicate]

I have a requirement to build a circuit which can identify 3 states at the input and the output is given to ADC of uC. I have the below circuit for 12 V systems: The input can be connected to gnd, ...
Nidhi's user avatar
  • 87
0 votes
0 answers
464 views

LM2596S-5 Circuit, 7.x V instead of 5V output voltage. What did i do wrong?

for a little project of mine i need 24 and 5 Volts on my PCB. To do so i want to step down a 24V supply. I planned to use the LM2596SX-5.0/NOPB for this task and designed it with the TI Webench Power ...
E.Murphy's user avatar
0 votes
1 answer
511 views

RS-485, 5Vdc and 24Vdc over a single Ethernet cable

I recently started to work on a project that involves motor drivers and microcontrollers in a network topology. This is rather a theoretical question, just something that I was thinking about. The ...
Marcell Juhász's user avatar
1 vote
1 answer
2k views

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 ...
Matthys Du Toit's user avatar
0 votes
1 answer
128 views

2 x 90 Ah 12v deep cycle batteries in series runs 77-90w for under 20 minutes. Why?

I am trying to understand the maths here. I have 2x90Ah 12v batteries in series (24v) and they are powering my computer. The peak power is 120w while the computer is shutting down during a power loss. ...
Eric The Red's user avatar
0 votes
2 answers
568 views

Can I change the voltage (12V) input into my optocoupler to 24 V?

simulate this circuit – Schematic created using CircuitLab I have an inductive sensor (LJ18A3-8-Z/BX,) normally open 6V to 36V 300mA. It is connected to a 12V 80kHz single channel opto-coupler. ...
Oz Sco's user avatar
  • 3
0 votes
0 answers
149 views

Automotive 24v TVS suppression Question & feedback

Iv been contemplating which approach for voltage suppression for a 24V system. the parts in consideration are RBO40-40G// TPSMD20A || TPSMD251A// PNS40010ER,115 Load Dump for the one on the top ...
lolbardsnin's user avatar
0 votes
3 answers
769 views

Driving a 12V-24V 20 ohm solenoid from a 24V 0.5A input signal

I had a question about trying to get a solenoid with 20 ohms resistance to power up from a 24V Power supply limited to 0.5 amps. I tried connecting a 10 ohm resistor in series, to drop the driving ...
BikerDude's user avatar
  • 173
2 votes
3 answers
2k views

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....
Garet Jax's user avatar
  • 121
1 vote
3 answers
1k views

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 ...
spacefolder's user avatar
1 vote
1 answer
66 views

Ebike 24v relay board - switch?

Hi I’m building an Ebike and using a reclaimed relay board from an old electric moped. My question is the relay board has 3 small wires presumably for the switch, but this confuses me as I only need 2 ...
Steve's user avatar
  • 11
7 votes
2 answers
2k views

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 ...
Custos's user avatar
  • 105
2 votes
1 answer
241 views

Toggle Flip-Flop for Voltage Higher than Logic Levels

I need a T flip-flop for 24V. The purpose is to take a 24V 50% duty cycle 0.5Hz pulse wave and halve its frequency to 0.25Hz, so that the output wave toggles between 0 and 24V at the input's rising ...
IntiEngineer's user avatar
1 vote
2 answers
60 views

Normally Closed, 24V DC, 1/4 NPT Female, 1.4 Cv solenoid valve power supply

I have a solenoid valve of Normally Closed, 24V DC, 1/4 NPT Female, 1.4 Cv, 500mA max current drawn. Can somebody verify the power supply requirement. would this be an ideal power supply unit for the ...
Nandakumar Menon's user avatar
0 votes
1 answer
58 views

Connecting 2 identical led RGBW controllers with 12V led strips same length into a 24V Power supply [closed]

Ok, some bad decisions took place and now i am stuck with no money and: 24V 8.33A power supply with 2 channels. Magic Home 5V-12V-24V RGBW wifi Controller 192W max (got them from here) 15m of 12V ...
Fero's user avatar
  • 3
0 votes
1 answer
530 views

Read 24 Vac signal with a Raspberry Pi

I want to read a 24 Vac signal coming from my old automatic gate with my Raspberry Pi. The signal tells me if the gate is OPEN->24 Vac or CLOSED->0 Vac. Raspberry Pi input are 3.3 Vdc tollerant. ...
Riccardo Minati's user avatar
2 votes
1 answer
1k views

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 ...
alfonso's user avatar
  • 457
2 votes
2 answers
2k views

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 ...
Birts's user avatar
  • 35
1 vote
1 answer
174 views

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 ...
Pedro NF's user avatar
  • 265
1 vote
0 answers
38 views

Send a 60Hz trig signal over a 9m cable

I want to send a trig signal over a 9m cable, the signal is around 60Hz (each 15ms it sends a 1ms pulse). In order to avoid electrical interference I convert the 3.3V original signal with the ...
Pedro NF's user avatar
  • 265
0 votes
1 answer
424 views

Interface 24V signal from one device to 3.3V signal on another device

I have a device A that sends a signal through an optocoupler, this signal travels through a 7m cable and is used by another device B that has a SN74LVC1G17SingleSchmitt-TriggerBuffer powered by 3.3V, ...
Pedro NF's user avatar
  • 265
0 votes
0 answers
79 views

How to power bulbs expecting 24V AC from a car's "cigarrete" socket?

I'm turning the trunk of my car into a UV-sanitizer chamber -- so that, by the time I return from the supermarket, the bags and the packages handled by strangers there are sterile. To this end I ...
Mikhail T.'s user avatar
-1 votes
3 answers
986 views

How to add an emergency stop switch in a circuit?

I am into a project, where I have made a a bot, which has a 6 degree of freedom robotic arm with four wheels. I need to add a kill switch that is connected to a relay, which stops all the 10 motors. I ...
Electronic_Nerd's user avatar
1 vote
2 answers
943 views

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 ...
Christian Holm's user avatar
0 votes
3 answers
964 views

Can I use 1 mm² wire for 24 VDC / 15 A load?

I am currently using 1 mm2 copper wire for a my application of driving a 360 watt motor, haven't caused any problems for me yet. The total wire length is around 3 meters. a voltage drop of 0.5 V ~ 1 V ...
Hariharan's user avatar
0 votes
2 answers
91 views

Which device will allow me to simply capture 24v?

I'm new to electronics, struggling to work out whether this is simple and I'm missing something or whether it's a lot more complicated that what I anticipated. I have something (some device) that is ...
JᴀʏMᴇᴇ's user avatar