Tinusaur development board is small board with Attiny85 microcontroller. Microcontroller is DIP socketed so it can be replaced with other tiny micros like Attiny25/45 and 85 and their variations.
Board has all minimum electronics to get it working. These include female headers for pins, Programming ISP adapter, coin cell battery holder, reset circuit. It doesn’t have a voltage regulator as it is more designed to be portable battery operated platform. This allows to make it small and lightweight design. As we know Attiny85 can be programmed using Arduino IDE or using standard C/C++. In order to program using USB connectivity, you will need to attache serial to USB converter. Since it is build by using through hole components it looks pretty attractive for those who like to build things at home.