Using the 555 Timer

How to use a 555 Timer

555 Timer Modes Explained - The Learning Circuit

DEEPER SLEEP💤 @IM8Health is part of my nightly ritual. Because sleep doesn’t start with the lights off— It starts with the nervous system. 4-7-8 Breathing slows the heart, regulates CO₂, and increases vagal tone. It shifts you out of “fight or flight” and into true recovery. Inhale for 4. Hold for 7. Exhale for 8. Repeat for 3–5 minutes. This breath protocol increases melatonin, drops cortisol, and calms the amygdala. It’s used by functional medicine doctors, trauma therapists, and elite perfor

Timer Sound Effect - No copyright

30 Seconds Timer With Sound Effect

Countdown Timer with Sound effects and Voice HD!