# 555 Timer & Oscillators Pro

> Practical Oscillator Circuits Using 555 Timers, Logic ICs, and Op-Amps.

Canonical page: [https://chrome-stats.com/d/com.algsoftlab.timer555pro](https://chrome-stats.com/d/com.algsoftlab.timer555pro)

## Overview

- **ID:** `com.algsoftlab.timer555pro`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ALG Software Lab
- **Category:** BOOKS\_AND\_REFERENCE
- **Downloads:** 136
- **Version:** 4.0
- **Last updated:** 2026-09-13
- **First published:** 2024-06-12
- **Publisher country:** LV
- **Size:** 9.43 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.algsoftlab.timer555pro)
- **Website:** [https://algsoftlab.com/](https://algsoftlab.com/)
- **Privacy policy:** [https://algsoftlab.com/privacy-policy-for-mobile-apps/](https://algsoftlab.com/privacy-policy-for-mobile-apps/)

## Description

Master the design of oscillators and waveform generators with 555 timers, logic ICs, op-amps, and transistors.<br><br>The application provides a comprehensive collection of over 120 tutorials and circuit diagrams, covering 555 timer circuits and practical applications, CMOS 4000 series logic oscillators, TTL 74LS and 74HC series oscillators, operational amplifier–based waveform generators, and transistor multivibrators. Designed for electronics beginners, students, hobbyists, and professional engineers, the app serves as a complete reference and learning tool for designing, understanding, and building oscillators, multivibrators, pulse generators, and waveform circuits commonly used in both analog and digital electronics.<br><br>In addition to tutorials and schematics, the app includes built-in calculators for frequency, timing, duty cycle, and component value estimation, helping users quickly calculate and adjust circuit parameters. All topics are presented with clear circuit diagrams and detailed explanations.<br><br>Available in 14 Languages:<br>• English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language!<br><br>Covered Topics:<br><br>• 555 Timer IC Series<br>• Astable, monostable, and bistable modes<br>• Pulse Width Modulation (PWM)<br>• Voltage conversion circuits<br>• Sensor and external module interfacing<br>• CMOS Logic Oscillators<br>• CMOS 4000 series circuits<br>• Astable, monostable, and bistable modes<br>• Gated CMOS oscillators<br>• TTL / HC Logic Oscillators<br>• TTL 74LS series circuits<br>• 74HC series logic oscillators<br>• Astable and monostable modes<br>• Operational Amplifier Oscillators<br>• Sine wave generators<br>• Square-wave pulse generators<br>• Triangle wave generators<br>• Transistor-Based Oscillators<br>• Transistor-Based Astable multivibrators<br>• Transistor-Based Monostable multivibrators<br><br>The Pro edition provides additional tools for faster learning and easy navigation:<br>• Full-text search across all lessons and components<br>• Favorites for saving and organizing important topics<br><br>The content is regularly updated and expanded with each new release, ensuring the latest tutorials and circuit examples are always available.

## Rankings

- #1,860,371 — Overall

## Permissions and access

### Permissions

- `com.algsoftlab.timer555pro.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.CHECK_LICENSE`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.algsoftlab.timer555pro)