All Questions
36
questions
12
votes
6
answers
3k
views
Second opinion on PCB design for relay made in Altium
Edit: I have added the updated PCB design at the bottom over this post (for anyone curious about the progress)
And a big thanks to everyone who commented, it really helped me out a lot!
Original ...
- 137
0
votes
1
answer
55
views
LTspice AC/DC converter with DC/DC boost converter
So this is my first time using LTspice and I need to convert my (AC) Vin 11.5V to DC and then boost DC voltage to Vout 22.5V. I have a few givens and some I needed to calculate. I am struggling to ...
0
votes
1
answer
74
views
Calculating input power of ACDC power supply
I'm trying to calculate the input power draw of an ACDC power supply that we are using in a control chassis and am confused by what to me looks like conflicting information in the datasheet.
The power ...
- 156
0
votes
1
answer
81
views
DC appliances running on AC system [duplicate]
How do DC ran appliances work in an AC electrical system? For example, a house runs on AC, but the microwave runs on DC. How exactly is AC converted to DC? Does that DC power then have to invert back ...
- 21
0
votes
0
answers
92
views
DC circuit works well and AC does not
I have the following circuit that consists of a power supply that, despite the redundancy, powers a 12V lamp and an arduino with 4 solid state relays. I do the tests with a direct current laboratory ...
0
votes
3
answers
430
views
Isolated vs. Non-Isolated AC Mains to 5v Converter
I am working on an internet connected lamp project that includes an AC dimmer and touch sensor. I am wanting to design a custom PCB but am confused if I should use an isolated or non-isolated ...
- 157
2
votes
1
answer
785
views
Multiple AC-DC power supplies: one direct AC wall plug or two?
I'm building a data acquisition system that needs to power sensors and a high voltage contactor at 24Vdc, 12Vdc, and 5Vdc. After reading another post, it seems it is best to use separate AC-DC power ...
- 21
18
votes
3
answers
5k
views
Does this AC to DC + breadboard setup have the ability to kill/severely hurt me?
I'm currently building a PC peripheral that uses an AC to DC converter to power a set of DC fans. I'm not a trained EE or electrician, so I want to make sure I'm not putting myself a risk with this ...
- 285
4
votes
6
answers
1k
views
Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?
I have a circuit where the 24V AC secondary voltage of a transformer is full wave rectified to DC.
The only parts that this circuit is connected are some 24VDC solenoids and a 24VDC relay. The ...
- 567
-1
votes
3
answers
134
views
Simple circuit to sample 120 VAC and yield 8.33 ms pulses
Have you noticed the lack of availability and prices of RTC chips lately? A simple DS1307 RTC is simply not available right now. Last year I purchased DS1307s for less than a buck. Now they are $4+ ...
- 319
0
votes
1
answer
304
views
12V AC to 12V DC converter to power an Arduino and some WS2812B 5050 LEDs
I am looking to convert 12V AC to 12V DC to power an Arduino through the VIN pin. The Arduino will be mounted on a PCB through header pins, please see below.
This is the board I have at the moment.
I ...
- 65
0
votes
2
answers
182
views
AC-to-DC Conversion: Which topology is better?
I am putting together a circuit board that is supposed to do its own power regulation. I need to convert 120VAC to ~5VDC. Due to the very limited real estate on the PCB, I would rather not use ...
- 101
1
vote
1
answer
202
views
Can Earth be utilized as the whole circuit's common ground?
I'm currently handling a project that requires a transformer to step down 230VAC to 6VAC, from there, further scale-down to a voltage that is in the readable range of the microcontroller (as not to ...
- 43
0
votes
2
answers
2k
views
Is It Posible To Have Step Up Power Supply Without a Transformer?
I am trying to design a high voltage low current power supply. My purpose is to design it without a transformer. For example circuit like this :
My input is 220V AC after this circuit I am going to ...
- 5
1
vote
2
answers
666
views
AC/DC Converters in Series with the Same AC Source
Would it be safe to connect two identical AC/DC converters in series if they share the same AC source? My concern is that the negative DC output is grounded somewhere in the converters causing the ...
- 145