Probably the most-viewed post on this blog so far has been my project to construct a discrete-transistor replica of the 555 timer IC. I’m pleased to report that, due to popular demand, the TT555 is now available in kit form!
![](https://www.tinytransistors.net/wp-content/uploads/2022/06/TT555-kit-components-1024x792.jpg)
This is your chance to prove that you’re a real SMD soldering expert: to assemble it, you need to place 43 components onto a 10×10 mm2 PCB, pick and place 01005 size resistors (0.4×0.2 mm2), and solder DFN-1006-3 packages (1.0×0.6 mm2). A microscope, sharp tweezers and a fine-tipped soldering iron are essential tools to complete this project.
Please click here to find the TT555 on Tindie!
Included in the package are:
- One bare TT555 PCB
- One set of thin pin headers
- All resistors and transistors needed to assemble the circuit, including a few spares of each component
- Extensive documentation
All documentation is also available online:
![](https://www.tinytransistors.net/wp-content/uploads/2021/05/TT555-vs-NE555-1024x603.jpg)