What's New in Version 3.3
Jul 2, 2026
Practical Oscillator Circuits Using 555 Timers, Logic ICs, and Op-Amps. Download and install old versions of 555 Timer & Oscillators Guide that suits your device model and enjoy your favorite features!
• Added support for Android 17 devices.
• Updated app libraries and components to the latest versions.
555 Timer & Oscillators Guide old version 3.3 was released on Jul 2, 2026 by ALG Software Lab. The app download size is 12.8 MB. We recommend you download the latest version of 555 Timer & Oscillators Guide for the new features and better performance.
Download the Latest VersionCheck out the detailed comparison between the latest and old version of 555 Timer & Oscillators Guide, including the file size and Android system requirements.
| Version 3.3 | Version 4.0 (Latest) | |
|---|---|---|
| Package Name | com.algsoftlab.timer555 | com.algsoftlab.timer555 |
| Version | 3.3 | 4.0 |
| Update Date | Jul 2, 2026 | Sep 16, 2026 |
| Size | 12.8 MB | 9.2 MB |
| Requires Android | ||
| Architecture | arm64-v8a | arm64-v8a |
| Signature | 63c97b9d1f6e1a0b694778d1998d4137acff853b | 63c97b9d1f6e1a0b694778d1998d4137acff853b |
| Google Play App License | Required | Required |

