Customer:
I have an LED strip with a dimmer/controller. The dimmer can turn the LED strip on and off via a momentary switch. I also have a touch sensor that holds a constant voltage, except when touched - the voltage then drops to 0V. Can I use this relay (possibly with an inverting transistor) to simulate a button press on the momentary switch when the touch sensor is pressed? Everything operates at 24V.
Original message (Croatian)
zamolio bih Vas za pomoć.
Imam LED traku i pripadajući dimmer/controller.
Između ostalog, dimmer može paliti gasiti LED traku preko tipkala (momentary siwtch).
Imam i touch senzor koji je uvijek pod naponom, osim kad se dotakne, gdje napon pada na 0V.
Mogu li iskoristiti ovaj relej (vjerojatno uz uvijet da ubacim tranzistor koji će invertat funkcionalnost touch senzora) kako bi simulirao pritisak tipkala (tj spojio kontakte) dok je touch senzor pritisnut?
Sve je na naponu 24V.
Hvala,
Lp!
Originally submitted via email support on 29 August 2024. Migrated to the forum for community visibility.
Soldered Support:
A 5V relay cannot be used for a 24V circuit. This relay is designed for 5V operation and all components on the board are adapted for that voltage. Can you describe the exact use case? As I understand it, you want to use the relay to turn the LED strip on and off via the touch sensor? This can be accomplished with transistors without needing a relay.
Original message (Croatian)
Ako relej napajate s 24 V onda ga nije moguće spojiti u navedeni krug. Relej je za napon od 5V te su sve komponente na pločici prilagođene tome naponu.
Ako možete napisati za što bi se točno koristio relej. Koliko sam shvatio relej bi koristili za gašenje/paljenje LED trake pomoću touch senzora? Ako je tako onda se to može odraditi i s tranzistorima bez da koristite relej.
Customer:
I have the following setup:
- 24V LED strip
- 220V to 24V power supply
- Zigbee LED dimmer/controller 24V
- Touch sensor/switch
I want to control the LED strip both via Zigbee and via the touch switch. The LED controller has 2 pins for a momentary switch. When these pins are connected, the LED strip turns on or off. I measured the voltage between these 2 pins: 4.5V. The touch sensor on the switch pin provides a constant 24V. When the sensor detects a press, the voltage drops to 0V.
Since electronics isn’t my field, my thinking was that I need a 24V relay on the input side that is normally closed. When the touch sensor is not pressed, there is voltage on the relay and the relay output is open. When the touch sensor is pressed, the voltage drops to 0V, the relay closes, and the LED controller registers the press. Maybe there’s a simpler solution - I’m open to all options!
Original message (Croatian)
imam sljedeće:
Želim kontrolirati LED traku, osim preko Zigbeea i preko touch prekidača. LED controller ima 2 pina za momentarni prekidač/tipkalo. Kada se pinovi spoje, LED traka se pali ili gasi.
Izmjerio sam napon između ta 2 pina (4.5V).
Touch senzor/prekidač na zelenoj (switch) pinu daje konstantan 24V napon. Kada senzor registrira pritisak, napon padne na 0V.
Budući da mi struka nije elektrotehnika, moje skromno razmišljanje je da mi treba relej na 24V input strane koji je normally closed.
Kada touch senzor nije pritisnut, postoji napon na releju, output strana releja je otvorena.
Kada se pritisne touch senzor, napon padne na 0V, relej se zatvori i LED controller registrira pritisak.
Možda ima neko jednostavnije rješenje, otvoren sam za sve opcije!
Puno Vam hvala na pomoći!
Lp!
[name removed]
Soldered Support:
You can use BJT transistors for this, but you must connect 2 transistors as shown in the attached schematic because you need to invert the signal. Connect the transistor output to one pin and the other pin to GND. Before connecting, use a multimeter to verify which pin on the controller is GND: power down everything, set the multimeter to continuity mode, connect one probe to the negative power rail, and connect the other probe to each of the 2 switch terminals. The one that beeps is GND.
Use 10k pull-up resistors and 1k series resistors on the transistor bases (the 2 resistors connected to the bases). Make sure to connect resistors to the transistor bases - without them the transistor will have excessive gain and the second transistor will be destroyed.
If you need further clarification on the wiring, I can draw a schematic with your specific components.
Original message (Croatian)
Poštovani isprike na kasnom odgovoru, nisam prebacio ticket kolegi Robertu, a završio sam na bolovanju prije godišnjeg pa nisam stigao odgovoriti.
Za navedeno možete koristiti i BJT tranzistore, ali morate spojiti 2 kako prikazuje shema na slici u prilogu jer trebate i invertirati signal. Izlaz tranzistora spajate na jedan pin, a drugi pin spajate na GND. Prije spajanja provjerite multimetrom na driveru za lampu dali je jedan od pinova GND (ugasite sve s napajanja te stavite multimetar na zujalicu. Jedan kraj multimetra spojite na minus napajanja, a drugi spojite na jedan od 2 terminala za spajanje prekidača. Na kojemu zapišti multimetar, taj je GND).
Za pull-up otpornike možete koristiti 10k, za serijske s bazom (2 otpornika koji su spojeni na baze tranzistora) možete koristiti 1k. Pazite samo da spojite otpornike na bazu tranzistora jer ako ga ne stavite tranzistor će imati veliko pojačanje i doći će do uništenja drugog tranzistora.
Ako je potrebno još nešto pojasniti oko spajanja mogu i nacrtati shemu s vašim uređajem.
Attachment omitted in migration: transisotr switch.png