Questions tagged [24v]

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Non Inverting switching 24V with 3.3V 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 fixed 24V voltage from the supply. When ...
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2 answers
129 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 ...
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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 ...
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223 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 ...
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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 ...
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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 ...
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2 votes
1 answer
204 views

H-bridge driver

I am currently working on some hobby project. I have a 24V 2A DC motor that I want to drive. I designed a board with a designated IC on it to drive the motor, it wirked just fine. But then I thought ...
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200 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 ...
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1 answer
60 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 ...
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54 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, ...
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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 ...
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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 ...
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1 vote
1 answer
494 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 ...
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77 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. ...
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2 answers
299 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. ...
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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 ...
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3 answers
195 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 ...
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2 votes
3 answers
682 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....
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3 answers
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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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1 answer
62 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 ...
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2 answers
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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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2 votes
1 answer
96 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 ...
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1 vote
2 answers
42 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 ...
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1 answer
31 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 ...
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1 answer
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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. ...
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2 votes
1 answer
659 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 ...
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2 votes
2 answers
606 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 ...
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1 vote
1 answer
122 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 ...
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1 vote
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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 ...
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1 answer
198 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, ...
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0 answers
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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 ...
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-1 votes
3 answers
453 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 ...
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1 vote
2 answers
495 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 ...
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3 answers
293 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 ...
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2 answers
79 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 ...
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1 vote
0 answers
63 views

Battery management for 12-24V motors

We have 4 12-24V motors which we want to connect to a 14,8V battery. Two of the motors are position controlled (M3 and M4, see figure) and will not draw much current as they will mainly be stationary. ...
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1 answer
376 views

What is the maximum voltage for MPPT/PWM to charge a X volt battery?

I currently have a PWM 12/24v (auto commute) with ~18V as input and a 12V battery in the output. I wanted to switch to 24V battery and I thought about going ~36v solar panel. (18V * 2) Then I saw ...
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648 views

How to connect a 12V battery to a 24V system?

I have a 24V battery (two 12V lead/acid in series) connected to solar panels and I'm looking for a way to have a 12V battery and circuit. (But the solar array will charge the 24V system so i need the ...
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0 votes
1 answer
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24V battery with both 24V and 48V loads [closed]

I am looking for a simple solution to power my sailboat motor, it’s 48V 12kW, so it’s quite beefy. I have eight 24V lifepo4 cells (4.5kW) each, a 24V DC generator and a 2kW of solar, I would like to ...
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0 votes
1 answer
218 views

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 answer
139 views

Arduino RGBW 24v LED strip driver

This might not even be the right place for me to ask, but I hope somebody can help; I have an arduino mega with 4 PWM outputs (5v, fitted with 220 ohm resistor) that I would like to use to control ...
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0 votes
2 answers
139 views

Trigger distant camera using 3.3V

I need to trigger a camera using a 3.3V signal, the camera is at the end of a 3 meter cable. This camera has two trigger inputs, a 3.3V GPIO input and an optocoupler input with max input of 30V. I ...
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0 answers
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High Voltage Push-Pull MOSFET logic gates

Hello, I would like to implement typical MOSFET logic gates in my circuit with V+ at 24V and Input ranging from 0-24V. This posts a problem for the MOSFET however as I would either exceed the gate ...
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0 votes
1 answer
48 views

OK To Use This Male/Female Jack Combo For 24 Volt DC?

I'm using 24 volt DC motors along with 12 volt solenoid actuators for a installation piece. For ease of install and maintenance, I want to wire each motor with a barrel jack like the one below: ...
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1 answer
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24V 3D Printer - power ratings

I have a 3D printer at home and looking to improve some parts. The PSU on the printer has no labels so I'm not certain what it's doing - but the 3D printer's spec. sheet says it's 600W peak and it ...
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1 answer
237 views

Two server powersupplies in a row dangerous?

I have two server PSUs from HP which can output 12V with 1200W (HP DPS 1200.) My goal is to obtain 24V by chaining the outputs of the two units. I have modified one of the PSUs so that the negative ...
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374 views

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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2 answers
477 views

24V LED Strip Circuit - Switch, Breaker & Wiring Size Requirement

I am running a long LED strip (24V, 21 meter, 0.6A per meter, so technically 13A). The 24V PSU supplying power to the strips is to be connected to a switch that is rated 240V, 10A & 2400W. ...
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1 vote
0 answers
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What can I add to a DC circuit, to limit the voltage to 24V and current to 16 amps?

I have a battery pack that can put out around 25V and 20 amps, but it needs to be limited to 24V and 16 amps. Update: This is a follow-up to my question from yesterday: Protected 18650 batteries ...
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2 answers
2k views

24V signal switching optccoupler

We have a robot, and it has 32 digital output, fed into a homemade PCB. On the PCB we have optocouplers, which have a forward voltage around 1.2-1.3V. So I need to drop the voltage a lot. That's why ...
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