# Pulse throttle

Process

Suppresses repeated pulses within a configurable discard period. The first pulse passes through and starts a cooldown window during which subsequent pulses are dropped. Useful for debouncing noisy signals or rate-limiting pulse outputs.

Pulse throttle

Pulse throttle ver: 1

# Inputs

ID	Abbrev	Name	Type	Default	Description
`input`	`I`	Input	BOOLEAN	`false`	Pulse signal. Only rising edges that arrive outside the discard period are forwarded.

# Outputs

ID	Abbrev	Name	Type	Default	Description
`output`	`O`	Output	BOOLEAN	`false`	Throttled pulse output. Mirrors the forwarded pulse shape.

# Configuration

ID	Name	Type	Default	Unit	Description
`discard_period`	Discard period	NUMBER	`0`	s	Cooldown window in seconds after forwarding a pulse. Pulses arriving during this window are dropped. Set to 0 to disable throttling. Details: ≥ 0

# State

ID	Name	Type	Default	Unit	Description
`prev_input`	Previous input state	BOOLEAN	`false`		Stores the previous state of the input to detect rising and falling edges.
`discarding`	Discarding	BOOLEAN	`false`		Whether the block is currently in the cooldown window.

# Source Code

View Volang source

channel = input::channel()
value = input::value()

extern fn onCallback(v) {
    state::set("discarding", false)
}

if (channel == "input") {
    prev_input = state::get("prev_input")

    if (value and !prev_input) {
        discarding = state::get("discarding")
        if (!discarding) {
            output::set("output", true)

            discard_ms = math::round(config::get("discard_period") * 1000)
            if (discard_ms > 0) {
                state::set("discarding", true)
                callback::set(discard_ms, "onCallback", 0)
            }
        }
    }

    if (!value and prev_input) {
        output::set("output", false)
    }

    state::set("prev_input", value)
}