Uncle Jeff's Sensors: Expanding Redstone Possibilities
Redstone engineers are always hunting for new ways to interact with Minecraft's world, and Uncle Jeff's Sensors delivers exactly that. What began as a simple moon phase detector has grown into a full suite of clever redstone components that read the environment and living entities around them. Whether you want to automate a farm based on lunar cycles, trigger defenses during thunderstorms, or sort mobs with surgical precision, this mod packs a surprising amount of utility into a few carefully designed blocks.
Moon Phase Sensor: Lunar Logic at Your Fingertips
At the heart of the mod sits the Moon Phase Sensor, a block that behaves like a daylight detector but responds to the night sky instead of the sun. During the day, it outputs zero signal. At night, its redstone strength equals the current moon phase plus one, giving you a clear numeric readout of where you are in the eight-day lunar cycle.
The crafting recipe is deliberately unusual to avoid conflicts with other mods. You'll need three glass blocks across the top row, a red mushroom, a quartz flake, and a raw fish (the standard kind, not clownfish, pufferfish, or salmon) in the middle, and wood slabs, redstone dust, and another wood slab along the bottom. It might look odd, but the logic is sound: certain fish spawn according to moon phases, and mushrooms react to light levels, making the ingredients thematically fitting.
Signal strengths map neatly to each phase:
- Full Moon: 1
- Waning Gibbous: 2
- Last Quarter: 3
- Waning Crescent: 4
- New Moon: 5
- Waxing Crescent: 6
- First Quarter: 7
- Waxing Gibbous: 8
Clever builders can combine a Moon Phase Sensor with a daylight detector to exploit the twilight overlaps, creating circuits that trigger only during specific windows of the Minecraft day-night cycle. One popular use involves moving a storage minecart through a sequence of loading and unloading stations, perfectly timed to the lunar rhythm.
Weather Sensor: Reading the Skies
The Weather Sensor acts like a sophisticated cauldron that never needs filling. It emits a variable redstone signal based on the current weather in its biome, automatically accounting for deserts, frozen regions, and high-mountain snowfall. Place it outdoors, and a visual water level inside the block rises and falls with the signal strength, though you cannot scoop water from it.
Crafting requires a quartz flake and an iron ingot in the top row, three quartz flakes in the middle, and netherrack, redstone dust, and netherrack at the bottom. The resulting block delivers rapid signal transitions as storms roll in or clear up, making it perfect for automatic skylight covers, lightning-triggered farms, or simply knowing when to carry a water bucket.
Signal output depends on conditions:
- Undercover or indoors: 0
- Cloudy in a desert: 1
- Snowfall: 1–5
- Rain: 6–10
- Thunderstorm: 11–15
Because the sensor checks local biome weather, you can set up distinct redstone responses for different parts of your base, all from a single compact component.
Uncle Jeff's Pressure Plates: Smarter Mob Detection
Starting with Minecraft 1.8, the Sensors Mod absorbed Uncle Jeff's Pressure Plates, a collection of specialized plates that detect specific categories of living entities. Tired of creepers waltzing through your iron doors? Want to separate zombies from skeletons in a mob grinder? These plates make it possible without complicated command block setups. If you manage your mods through a launcher like foxygame.net, installing these pressure plates is as simple as selecting them from the built-in mod browser, letting you jump straight into advanced redstone builds.
Each plate uses a 2x2 shaped recipe: two redstone dust under two key ingredients. The signal output equals the strongest detected mob when multiple entities stand on the plate. Here's the full lineup:
Person Detector
Ingredient: Hay Bale. Detects non-hostile humanoids. Signals: zombie pigman (1), villager (2), player (15). Use it to create player-only doors or villager-triggered trading halls.
Livestock Detector
Ingredient: Clay Block. Detects farm animals. Signals: chicken (1), pig (2), cow (3), sheep (4), rabbit (5), squid (6), mooshroom (7). The killer rabbit will not trigger this plate, keeping your automatic shearing stations safe.
Non-Farm Animal Detector
Ingredient: Brick Block. Detects passive mobs not typically raised for meat. Signals: bat (1), horse (2), wolf/dog (3), ocelot/cat (4). Perfect for pet-friendly doors or horse-powered contraptions.
Monster Detector
Ingredient: Mossy Cobblestone. Detects overworld hostile mobs (except bosses). Signals: slime or magma cube (1), zombie (2), skeleton or wither skeleton (3), spider (4), creeper (5), silverfish (6), witch (7), killer rabbit (8), enderman (9). Now you can filter creepers into a separate trap or sound an alarm when a witch approaches.
Demon Detector
Ingredient: Quartz Ore. Detects Nether mobs (not bosses). Signals: magma cube (1), ghast (2), skeleton (3), wither skeleton (4), blaze (5). Ideal for blaze farm automation or ghast-proof bridges.
Owner Detector
Ingredient: Crafting Table. This plate outputs a signal of 15 only for the player who placed it. It can also be inverted to detect everyone except the owner. Use it for private vaults or guest-triggered traps.
Bringing It All Together
Uncle Jeff's Sensors transforms the way you think about redstone by turning abstract game states into tangible signal strengths. The moon phase and weather sensors open up time- and climate-based automation, while the pressure plates give you unprecedented control over mob sorting. Crafting a plate for the first time even grants an achievement (triggered after the Repopulation achievement, and only when crafted one at a time via drag-and-drop).
Whether you're designing a lunar calendar display, a storm-activated lighthouse, or a multi-mob sorting system, this mod delivers compact, vanilla-friendly solutions. The recipes may be quirky, but they ensure compatibility across countless modpacks. Dive in, experiment with signal combinations, and watch your redstone world come alive with environmental awareness.