The Infra-Red Transmitter circuit produces a low for about 40uS and has a duty-cycle of 90% HIGH and 10% LOW. It delivers a pulse of 150mA at a frequency of about 2kHz to the infra-red LED.
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- THE 555 TIMER IC
- USING THE 555
- DRAWING 555 "BLOCKS"
- THE 555 AS AN OSCILLATOR
- HOW THE 555 OSCILLATES
- THE ACTION OF PIN 4
- THE 555 AS A MONOSTABLE
- THE 556
- HOW TO USE THE CALCULATOR
- PULSE GENERATOR
- CHANGING THE MARK-SPACE RATIO
- GATING THE OSCILLATOR
- THE 555 AS A DELAY
- DRIVING HIGH-CURRENT LOADS
- MISTAKES
- KNIGHT RIDER
- LIGHT DETECTOR
- DARK DETECTOR
- POLICE SIREN
- IR LED TRANSMITTER
- SCHMITT TRIGGER
- TOUCH SWITCH
- NEGATIVE SUPPLY
- FLASHING INDICATORS
- THE 555 IC
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