IC 555 Timer Pro
Books & Reference
IC 555 Timers guide and calculators for circuit designers and engineers
- Downloads
- 140+
- on Google Play
- Price
- $4.99
- No in-app purchases
- Updated
- Sep 13
- 2026 · v4.0
Screenshots
About IC 555 Timer Pro
This application contains about 60 tutorials and diagrams using IC 555 series. It will be useful for both beginners and experienced electronics enthusiasts, students and engineers. The application can be used as a reference when creating various electronic circuits and projects with 555 timers.
The application content is available in the following languages: English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Spanish, Turkish, and Ukrainian. Also, the program has a full-text search function.
The app contains the following links, calculators and guides:
Schematic diagram and operating modes
• 555 Timers
• Internal structure
• Series 555 pinout
• Series 556 pinout
• Series 558 pinout
• Timers based on CMOS technology
• Monostable mode
• Bistable mode
• Astable mode
• Schmitt trigger
• Connecting modules from Arduino Sensor Kit
LED indication
• Connecting LEDs
• Two-way LED connection
• KY-008 laser transmitter module
• KY-034 Automatic Flashing Color LED Module
Sound alarm
• Sound alarm
• Two-tone siren
• KY-006 passive buzzer module
• KY-012 active buzzer module
Relays
• Relay control
• KY-019 relay module
Pulse Width Modulation
• Pulse width modulation (PWM)
• Generator with fixed duty cycle 50%
• Circuit with a duty cycle of less than 50%
• Electric motor speed controller
• KY-009 RGB full color LED SMD module
• KY-016 RGB full color LED module
Light sensors
• Light level detector
• Light sensor-comparator
• KY-018 light measurement module
IR sensors
• KY-010 photo relay module
• KY-026 flame sensor module
• Timer with optocoupler input
Microphone sensors
• KY-037 microphone module
• KY-038 microphone sound sensor module
Vibration sensors
• KY-002 vibration switch module
• KY-031 knock sensor module
Temperature sensors
• Temperature sensor
• KY-013 analog temperature sensor module
• KY-028 temperature sensor module
Movement sensors
• KY-017 mercury tilt switch module
• KY-032 obstacle avoidance sensor module
• KY-033 line tracking module
• KY-020 tilt switch module
Magnetic field sensors
• KY-003 Hall magnetic sensor module
• KY-021 magnetic reed switch module
• KY-024 linear magnetic hall module
• KY-025 reed switch module
• KY-035 analog magnetic Hall sensor module
Touch sensors and buttons
• Eliminating contact bounce
• KY-004 button module
• KY-036 touch sensor module
Voltage converters
• Voltage doubler
• Negative polarity voltage converter
The content of the application is updated and supplemented with the release of each new version.
Note: The Arduino trademark, as well as all other trade names mentioned in this program, are registered trademarks of their respective companies. This program is developed by an independent developer and is in no way affiliated with these companies
The application content is available in the following languages: English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Spanish, Turkish, and Ukrainian. Also, the program has a full-text search function.
The app contains the following links, calculators and guides:
Schematic diagram and operating modes
• 555 Timers
• Internal structure
• Series 555 pinout
• Series 556 pinout
• Series 558 pinout
• Timers based on CMOS technology
• Monostable mode
• Bistable mode
• Astable mode
• Schmitt trigger
• Connecting modules from Arduino Sensor Kit
LED indication
• Connecting LEDs
• Two-way LED connection
• KY-008 laser transmitter module
• KY-034 Automatic Flashing Color LED Module
Sound alarm
• Sound alarm
• Two-tone siren
• KY-006 passive buzzer module
• KY-012 active buzzer module
Relays
• Relay control
• KY-019 relay module
Pulse Width Modulation
• Pulse width modulation (PWM)
• Generator with fixed duty cycle 50%
• Circuit with a duty cycle of less than 50%
• Electric motor speed controller
• KY-009 RGB full color LED SMD module
• KY-016 RGB full color LED module
Light sensors
• Light level detector
• Light sensor-comparator
• KY-018 light measurement module
IR sensors
• KY-010 photo relay module
• KY-026 flame sensor module
• Timer with optocoupler input
Microphone sensors
• KY-037 microphone module
• KY-038 microphone sound sensor module
Vibration sensors
• KY-002 vibration switch module
• KY-031 knock sensor module
Temperature sensors
• Temperature sensor
• KY-013 analog temperature sensor module
• KY-028 temperature sensor module
Movement sensors
• KY-017 mercury tilt switch module
• KY-032 obstacle avoidance sensor module
• KY-033 line tracking module
• KY-020 tilt switch module
Magnetic field sensors
• KY-003 Hall magnetic sensor module
• KY-021 magnetic reed switch module
• KY-024 linear magnetic hall module
• KY-025 reed switch module
• KY-035 analog magnetic Hall sensor module
Touch sensors and buttons
• Eliminating contact bounce
• KY-004 button module
• KY-036 touch sensor module
Voltage converters
• Voltage doubler
• Negative polarity voltage converter
The content of the application is updated and supplemented with the release of each new version.
Note: The Arduino trademark, as well as all other trade names mentioned in this program, are registered trademarks of their respective companies. This program is developed by an independent developer and is in no way affiliated with these companies
What’s new
Version 4.0 · Updated September 13, 2026
Updated content and libraries. New UI design for tablets.
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