Science Zero
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Speedtrap   Speedtrap
  Measures the timing of events or speed of projectiles
Neon bulb oscillators   Neon bulb oscillators
Backup LED light   Backup LED Light
  Tiny automatic light powered by a backup capacitor
Proximity Detector   Proximity Detector
  NE555 oscillator based
Extremely simple switchregulator   Extremely simple switchregulator
  The simplest possible voltage regulator with high efficiency
COM84 PIC programmer   COM84 programmer
  Serial programmer for Microchip PIC microcontrollers
PIC high-voltage programmer   HV programmer
  Parallel programmer for Microchip PIC microcontrollers