All Questions
72
questions
-1
votes
2
answers
109
views
Did I draw this circuit diagram correctly for 2 MOSFETS? [closed]
Did I draw my circuit correctly?
My project consist of one 5 V solenoid (but uses 3.3 V), one voltage regulator (5 V to 3.3 V), one diode, two N-channel MOSFET transistors, and one 5 V LED strip all ...
- 31
0
votes
1
answer
108
views
Is my PCB ready for PWM solenoid control?
I am looking to upgrade my project to handle "back EMF" from solenoids when used in PWM mode in combination with MOSFET.
The original project lives on a breadboard, and I am attempting to ...
- 11
3
votes
2
answers
347
views
Problem driving solenoids with an IRF540 power MOSFET
I am using an IRF540PBF power MOSFET to drive a solenoid with 24VDC which works beautifully. When I try to drive a stronger solenoid the MOSFET gets stuck in the on position until I power the system ...
- 73
0
votes
2
answers
112
views
Solenoid fails under PWM control
I have a 12V solenoid rated at about ~6W and 40kg pull.
I am controlling it using ESP32, IRLB8721PBF logic-level mosfet.
MOSFET gate-gnd is also connected using 0.5W 5.6V zener diode.
ESP32-gate is ...
- 11
0
votes
2
answers
88
views
Am I using these MOSFETs correctly?
I am designing and testing a circuit that charges a capacitor to around 50V using a boost converter when 'ARM' is high, then discharges it through a solenoid when 'FIRE' is high. ARM and FIRE are ...
- 27
0
votes
0
answers
58
views
Noise spikes with optoisolated circuit driving 12VDC solenoid valve at 6.6 Hz
I have an existing circuit that drives a 12VDC solenoid valve on and off at ~6.7 Hz, 75ms on, 75ms off. This entire system is DC.
The Beagle GPIO logic '1' level is 3.3VDC, and the BeagleBone is ...
- 31
0
votes
0
answers
248
views
Using ESP32, TIP120s, and 12V DC to power three 12V solenoids
I want to control three 12V solenoid valves with an ESP32, using the GPIO pins on the ESP to switch TIP120 MOSFETs.
The ESP would be powered by a separate USB supply.
I went to circuito.io and it ...
0
votes
0
answers
354
views
Controlling a 12V solenoid with N-Channel mosfet
I use an N-channel mosfet to switch on or off a solenoid valve that uses DC 12V, 0.25A. This is the circuit I use.
Initially I used IRFZ44N and 1N4007, but they were too big for my application, so I ...
- 1
5
votes
1
answer
415
views
H-bridge design works but only with inductive load
I have an H-bridge configuration using gate drivers and bootstrap capacitors to drive the high side MOSFETs. I have a load that I pulse with stored energy from a capacitor. The capacitor voltage is ...
user298907
0
votes
0
answers
53
views
Solenoid control with Injector output
I am trying to control a high pressure oil solenoid that modulates clutch pressure for a front/rear torque split in an AWD car. The standalone ECU I am using is made for 8 cylinders but we are only ...
- 1
0
votes
2
answers
389
views
Switching multiple solenoid valves with microcontroller
I am trying to switch 20 solenoids at 12 V and 2.8 A from a microcontroller. This is the first time I am trying such a thing. And right now I am planning to use a IO expander to get enough pins and ...
- 85
2
votes
3
answers
817
views
Overcurrent protection for solenoid driver circuit
I need advice on designing an overcurrent protection circuit for a pinball solenoid driver.
I am building new driver boards for several of my games from the late 70s to mid 80s. All use the same board....
- 31
5
votes
3
answers
2k
views
Selecting a flyback diode
According to the schematic below , where J15 connects to solenoid B11HD-255-B-3 and solenoid B11HD-255-B-3 is rated 19V, 90W, what is the technical approach to selecting a flyback diode? (D15) I have ...
- 77
0
votes
1
answer
1k
views
How to drive this solenoid + littleBits?
I have a 5V solenoid, and I am trying to power it from littleBits.
I had a littleBits servo bit and cut its wires. The orange wire should be control wire. The reason I want littleBits is because I am ...
- 109
2
votes
4
answers
890
views
Does a flyback diode have to be connected to the + lead of a solenoid, or can it go directly to the power supply?
I am designing a control box to switch 24V DC high speed solenoids at a max frequency of 200Hz. They will be controlled by an Arduino Mega through N channel, rfp30n06le MOSFETs.
Here is a photo of the ...
- 21