Relay Pinout
I have this relay, and I can’t seem to figure out the Pinout. The pin header pins are +-/s
60 Replies
Usually the middle one is Common pin, left side is NO (Normally Open) and right one is NC (Normally Closed).
Thank you ! So, where would +/- from a micro USB cable go? And it has GND too. This is my first time using relays.
It’s being controlled from ESP 32 on S pin and powered with 5v
+ is the positive 5V, - is nothing but GND and S is the Signal
But do you know what is voltage rating of your relay?
there is no USB involved...
There are many type available, 5V, 12V are the most common
10 amp 240 v
it's a 5v coil
Ok
Barely visible, but yeahh, by the pic you sent 💯
I want this to turn on a lamp, is that possible or will a normal transitor work ?
for an AC powered lamp a relay is the way to go
Is this an Active relay or a Passive relay?
I don’t know, it came in an dev kit
It’s an normal desk lamp
By looking it seems an Active relay tho. But can't say.
it has a transistor driver on it
I asked coz I have got both the types with transistor on them
It has an resistor, LED, and an flubsck diode,
And transitor
idk what a "passive relay" is
They require the LOW signal on the Signal pin to turn on and HIGH to turn off.
Active is the vice-versa
After an quick google search they are different
that is just drive polarity... active LOW or active HIGH
Yeahh... but I call the active LOW as passive relay. But nvm...
So, can this relay be used to drive my 5v DC lamp?
oh, your "normal lamp" is 5v DC? yes
Yea
It’s this
the relay acts like an on / off switch
It seems like it has already a battery built-in and a motherboard to control it
It does not have an battery it’s an desk lamp that needs be plugged in 5v
Then why are you trying to connect a relay to it tho?
so that's where the USB came from, you'll need to switch the 5v USB power
So I want to use an esp 32 to turn this lap on.
Yeah I’m switching from 5v
But it has a touch switch for power right. Just from the pic.
the 5v will be on relay output side - that's fine
does the relay turn on when you apply LOW to "S"?
Idk I’m an noob, I want to use an IR sensor, when it detects and hands, to turn on the LED, I tied hooking up 5v to the +- bottom header pins the led did not turn on
So I’m using 5v 1 amps power, to turn on this 5v lamp
you need to go step by step
if you set your lamp on, and unplug the USB, what happens when you plug it back in?
The lamp works if o plug it into 5v I’ve been using it for years
It does not have an battery I’m 100% sure of that
I’ve been using it for years
i'm asking that specific question for a reason, does the lamp remember what state it was in when power goes away?
Like, if you turn it on the first time, then remove the USB power directly and then again if you give the power does it turn on directly, or do you have to turn it on again by touching it?
No
It turns on, but the setting is to saved
ok, so if it
There is no battery I’m sure of that
s on, you unplug it it turns back on when plugged in right?
We got it.
Yeah but the color brightness etc is not saved
ok, the relay will act like unplugging / plugging it back in
https://a.co/d/imEanzP this is the lamp or very similar
White crown LED Desk Lamp - Versatile and Dimmable
White crown LED Desk Lamp Dimmable Table Lamp Reading Lamp with USB Charging Port, 5 Lighting Modes, Sensitive Control, 30/60 Minutes Timer (White, First-Generation)
Ok , I know that but it may misbehave
so if that is OK, next step is to make sure the ESP will trigger the relay
I can’t rn, I don’t wanna waste you time
I can in an hour or so
Thank you!🙏
np, i might be around, or maybe my wife has "honey-do" projects for me 🙂
Thus, I need to write an code that gives the S pin an signal?
and, what pin is it? Is it the header pin on the botton that says S?
Also, is the diode on the dev board a good enough fly back diode? (I don’t have time to code for an couple of hours)
ACTUALLY the light does not turn on when plugged in, so I’ll find smth else, like an led light strip coz I wanna do this project
Can I have a like wiring diagram? For the top 3 pins? And a definition of what Normaly Open etc means ?? Thanks!
Thanks
NO is not connected (open) to COM, NC (normally closed) is connected to COM when the relay is off
Thx