2. IC 555 : “The IC Time Machine”
Multipurpose timer IC
Designed and built in 1971
Still widely used, with over
1billion units sold
worldwide
Cheap, Stable, Easy to use
www.thinklabs.in
3. IC 555: Applications
Operating modes
Monostable
Astable
Bistable
Non-traditional applications
Buffer
NOT Gate
Comparator
Schmitt Trigger
many more…
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14. BACK TO SENSORS
Proximity Sensing
Can we use the line sensors to detect objects??
How do we remove the Ambient Light??
Mechanical Filter
Electronic Filter
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15. Modulated Sensor
Obstacle
IR RX
IR
Transmitter Receiver
Signal Generator Signal
Filtering
(LM555 oscillator) Conditioning
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16. Sensors (TSOP 1738)
Used as remote control
receivers in TV, Music
players, etc..
Available for 30Khz to
56Khz carriers
Immune to ambient light
Output is active low and
toggles between 0 to 5V
Easy to use
Very Sensitive
www.thinklabs.in