Circadian half-cycler
 | This article relates to content added by Royalty (DLC). Please note that it will not be present without the DLC enabled. |
Circadian half-cycler
A signal redirector which isolates half of the brain, allowing the other half to sleep while the user remains outwardly awake. By alternating brain halves, the user never needs to sleep. Unfortunately, two hemispheres are better than one - working half a brain causes a reduction in consciousness.
Base Stats
- Type
- Medical Items – Body Parts
- Tech Level
- Spacer
- Market Value
- 1030
[Note] - Mass
- 4 kg
- HP
- 50
- Flammability
- 100%
Creation
- Crafted At
- Required Research
- Circadian influence
- Skill Required
- Crafting 8
- Work To Make
- 26,000 ticks (7.22 mins)
- Resources to make
15 + 
4
- thingSetMakerTags
- RewardStandardLowFreq
- techHediffsTags
- Advanced, ImplantEmpireCommon
- tradeTags
- Bionic, ImplantEmpireCommon
The circadian half-cycler is an artificial body part that removes a pawns need to sleep at the cost of a permanent 15% Consciousness penalty.
Acquisition
Circadian half-cyclers can be crafted at a Fabrication bench once the Circadian influence research project has been completed. The required techprint can be obtained either by trade or completing quests for the Empire. They require 15 Plasteel, 4 Advanced components, 26,000 ticks (7.22 mins) of work, and a Crafting skill of 8.
Summary
A circadian half-cycler is installed in the brain and removes the Sleep need entirely. Consciousness is reduced by 15%, which itself reduces work-related stats like Moving and Manipulation, as well as Eating and Talking.
When a pawn with this implant is shocked with EMP, they will receive brain shock, knocking them unconscious temporarily.
Installation
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Installing the part requires 2,500 ticks (41.67 secs) of work, 2x medicine of ?? quality or better, and a Medical skill of 5.
Removing the part requires 2,500 ticks (41.67 secs) of work, 1x medicine of ?? quality or better, and a Medical skill of 5.
If the operation fails, the part has a chance[What Chance?] to be destroyed.
Analysis
Assuming a colonist sleeps for 8 hours, this implant allows them to work an additional ⅓ of the day, and saves space on a bedroom. Even with the consciousness loss, this makes pawns have more work time, and thus better for many tasks. This assumes you don't have many sleep reducers; see #Comparison to reducing sleep for details on that.
An unfortunate side effect of the half-cycler is mood. No sleep will prevent Lovin' entirely, remove the moodlet from an impressive bedroom, and deprive a pawn of a bed's Comfort level. An armchair can provide comfort for crafter-type pawns, but all these mood-increasers are quite significant. Non-ascetic nobles still desire a bedroom that meets their needs.
Work
The consciousness loss has a different effect on different work types.
Good:
- Research, Hauling, Cleaning: All tasks are done slower, but they have no quality; the extra time makes up.
- Cooking: Like above; food poisoning chance is not increased.
- Construction, Crafting, Art: will produce the same-quality items, so the extra time is a net positive. Note that low-skill construction is more likely to fail.
Mixed:
- Plants: Allows more plants to be harvested, but lowers yield per plant. Bad when plant space is limited, good if not.
- Mining: Good for mining regular rock or deep drilling, bad for mining ores.
Bad:
- Social, Animals: The half-cycler is of little help: trade is limited, prisoners and animals sleep. Lowered Consciousness means more failed attempts and higher prices.
- Medical: Tends slower, with less quality, and have less successful surgeries. Tend speed is incredibly important, but tending itself is not.
- Combat: Worse accuracy, will get injured more, and more likely to die from Conciousness loss.
- EMP also becomes harder to use due to Brain Shock. It may be wiser to EMP mechanoids even if it'd hit a half-cycler pawn, which means you just lose a combatant.
Of course, pawns can be good at multiple work tasks. For example, a pawn that mostly does Crafting can also be your main Social pawn; independent cases should be weighed differently.
Comparisons
Comparison to reducing sleep
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A high quality royal bed, improvements to metabolism and blood pumping such as bionic stomachs and bionic hearts, and of course the circadian assistant all affect a pawn's need for rest.
A bionic stomach and heart increase the Rest Rate Multiplier to 111%, a legendary quality royal bed provides 168% rest effectiveness, and the circadian assistant decreases rest fall rate by 20%. Thus, they can reduce the required sleep down to 43%. Luciferium further improves the rest rate multiplier to 126%, and the required sleep down to 38%. Thus, the circadian half-cycler gives the pawn approximately an 4-4.5 hours of working time compared to an optimum sleeping set up, at the expense of the consciousness penalty, the loss of impressive bedroom, comfort the loss and lovin' mood buffs. The effect of the consciousness loss means that a pawn with a half-cycler will work slower, losing work progress approximately equivalent to 2 hours compared to a regular pawn over the course of the day.
Comparison to Never Sleep
 | This section relates to content added by Biotech (DLC). Please note that it will not be present without the DLC enabled. |
The never sleep gene will completely prevent sleep with no Consciousness loss. However, with a metabolic efficiency of -6, it requires negative genes or archite metabolism to even be used at all. It takes a large amount of negatives to negate the penalty, or archite capsules for the aformentioned metabolism gene.
Never sleep is not found in any of the default xenohumans, so a genepack must be found, both for the sleep gene and whatever you're using to compensate. Alternatively, you can start with the gene, which still comes at the genetic cost.
- Arm/Hand
- Archotech arm • Bionic arm • Power claw • Prosthetic arm • Wooden hand • Drill arm
• Elbow blade • Field hand • Hand talon • Venom talon • Flesh tentacle
• Flesh whip - Head
- Archotech eye • Bionic eye • Bionic ear • Bionic jaw • Bionic tongue • Cochlear implant • Denture • Aesthetic nose
- Head implants
- Joywire • Painstopper • Circadian assistant • Circadian half-cycler • Gastro-analyzer • Learning assistant • Mindscrew • Neurocalculator • Psychic harmonizer • Psychic reader • Psychic sensitizer • Venom fangs • Control sublink (Standard, High)
• Mechlink • Mech gestation processor • Remote repairer • Remote shielder • Repair probe - Spine
- Bionic spine • Revenant vertebrae
- Stomach
- Bionic stomach • Nuclear stomach • Reprocessor stomach • Sterilizing stomach • Fleshmass stomach
- Heart
- Bionic heart • Prosthetic heart • Heart • Adrenal heart • Corrosive heart • Metalblood heart
- Lung
- Lung • Detoxifier lung • Fleshmass lung
- Kidney
- Kidney • Detoxifier kidney
- Organs
- Liver
- Visceral implants
- Death acidifier • Aesthetic shaper • Coagulator • Healing enhancer • Armorskin gland • Stoneskin gland • Toughskin gland • Immunoenhancer • Love enhancer • Ghoul plating • Ghoul barbs
- Leg/Foot
- Archotech leg • Bionic leg • Prosthetic leg • Peg leg • Wooden foot • Knee spike
- Related
- Psylink neuroformer • Xenogerm
- Deprecated
- Scyther blade • Psychic silencer