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actor:relay_moduls [2026/05/14 19:57] – [Sensor topics on lamaPLC] vamsanactor:relay_moduls [2026/05/14 22:00] (current) – [Current Required] vamsan
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 Understanding relay voltage ratings is essential for microcontrollers. For Arduino, 5V/3.3V relays are typical, whereas Raspberry Pi Micro and ESP32/3286 generally require 3.3V relays.  Understanding relay voltage ratings is essential for microcontrollers. For Arduino, 5V/3.3V relays are typical, whereas Raspberry Pi Micro and ESP32/3286 generally require 3.3V relays. 
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 +For high-speed AC switching, it is recommended to use a [[ssr_moduls|Multi-channel Solid State Relay (SSR) Module]] instead.
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 +{{ :actor:multi_channel_relay_1.png |Multi-channel optocoupled relay module}}
  
 These voltage ratings, such as //"5VDC"// or //"3VDC,"// are marked on the relays along with the maximum load capacity for AC and DC, for example, 10A at 250V AC or 30V DC, and 12A at 125V AC or 28V DC. In my experience, these maximum values are often overstated; I usually cut them in half. For example, for 240V AC, I consider a safe maximum of 5A, roughly 1000 Watts. These voltage ratings, such as //"5VDC"// or //"3VDC,"// are marked on the relays along with the maximum load capacity for AC and DC, for example, 10A at 250V AC or 30V DC, and 12A at 125V AC or 28V DC. In my experience, these maximum values are often overstated; I usually cut them in half. For example, for 240V AC, I consider a safe maximum of 5A, roughly 1000 Watts.
  
 +{{ :actor:multi_channel_relay_2.png?400 |Multi-channel optocoupled relay module schema}}
  
-{{ :actor:multi_channel_relay_1.png |Multi-channel optocoupled relay module}} 
  
 ==== Current Required ==== ==== Current Required ====
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 <color red>If the Arduino output becomes overloaded, the unit will turn off and then restart. If the overload continues, the relays will cycle on and off, producing a distinctive clicking sound.</color> <color red>If the Arduino output becomes overloaded, the unit will turn off and then restart. If the overload continues, the relays will cycle on and off, producing a distinctive clicking sound.</color>
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 +{{page>:tarhal}}