All Questions
19
questions
0
votes
3
answers
165
views
Calculating current a capacitor can deliver
I made a simple coilgun circuit
Capacitor 50 V 10000 uF
DC power supply of 20 V - 5 A
Coil of enamelled wire 18 AWG - 3.5 ohm
My calculations according to Ohm's law the current in the capacitor ...
- 465
1
vote
3
answers
2k
views
PWM-controlled current source to drive a 24 V proportional solenoid valve using an Arduino
I would like to implement a PWM-controlled current source to drive a 24 V proportional solenoid valve using an Arduino.
What I need:
Input will be 5 V PWM with 5000 Hz frequency, duty cycle will ...
- 11
0
votes
0
answers
91
views
How to choose component values in a current drive circuit for solenoid?
I've designed a current drive circuit for a solenoid using a DAC and a MOSFET push-pull setup with feedback based off Figure 4 and 5 in this application note (https://www.analog.com/media/en/technical-...
- 11
-1
votes
1
answer
48
views
Solenoid magnetic induction graph
I need help solving this problem, if anyone had a similar problem it would help me a lot.
A table is given with the current flowing through the solenoid,also values for the magnetic induction vector ...
0
votes
1
answer
70
views
\$\delta n \cdot x + n \cdot \delta x~\$ equation of shrunk coil with incremented number of turns per unit length
The very long coil exists with the following information .
$$ a:=\text{radius of the circle of the coil} $$
$$ n:=\text{number of turns of the coil per unit length} $$
$$ x:=\text{length of the ...
0
votes
0
answers
88
views
Right capacitance for a capacitor parallel over power output?
I am building a self playing piano. I daisy-chained 11 74hc595 shift registers to control (11*8) solenoids. (figure 1 only shows 1). The solenoids are rated at 2 Amps each.
I use SPI from the arduino ...
- 35
0
votes
0
answers
48
views
How to get desired current on output of relay's module
I'm building automatic garden watering system using
Arduino Uno
5V relay module - this one https://www.amazon.co.uk/2-channel-trigger-module-JQC-3FF-S-Z-RBTMKR/dp/B01NAJ67ML, here are technical ...
- 101
0
votes
1
answer
82
views
No Current Flowing From 12v Solenoid Pins
I have recently designed my first PCB (forgive my poor understanding of electronics) and I'm having an issue with the pins that are supposed to be powering the 12v 2A solenoid.
Everything works as ...
1
vote
1
answer
107
views
Will This Solenoid Driver Circuit Draw Any Current When Control Input is Disconnected?
I'm working on a battery powered circuit board to drive a small solenoid motor, simple TIP120 as a voltage controlled switch grounding one of the motor terminals. I'm wondering whether or not I need ...
- 495
0
votes
1
answer
243
views
TIP120 and Solenoid Gas Valve
I have a Solenoid Normally Open gas valve rated at 29VA. It can be operated using 220VAC or 12/24/48 VDC. When i power it with AC mains voltage, it draws only 3mA @ 220V and the valve closes. When i ...
- 17
2
votes
2
answers
1k
views
Solenoids pulling more than rated current (6VDC, 300mA)
I'm building a musical instrument using thirty JF-0530B solenoids, rated 6VDC and 300mA. But I've discovered when I power them directly with 6VDC they draw ~1.5A, because they only have a resistance ...
- 33
1
vote
2
answers
1k
views
Choice between transistor or relay
I'm working on a personal project for college right now. I'm working on a circuit that can change the direction of current flow going through a solenoid, depending on an input signal. I'm using an ...
0
votes
2
answers
211
views
Supplying more current to a current limited DC motor
simulate this circuit – Schematic created using CircuitLab
Added requested schematic. Current circuit is on the left. Proposed additional circuit is on the right. I've never seen two solenoids ...
- 1
1
vote
1
answer
1k
views
Arduino Controlled adjustable current 0-1A,18V
Hello Masters of Electronics,
I'm civil ingeneer, electronics are big unknown to me, but it wakes up my interest. I would like to control proportional pressure with electronic proportional pressure ...
- 21
1
vote
4
answers
10k
views
12V solenoid drawing more current than it needs
I'm fairly new to practical electronics so I apologize if any of this is obvious. I am currently trying to use a microcontroller to control the energizing of several 12V solenoid valves using a PC ...
- 11