Xmas tree that creates a 555 timer from transistors and resistors and configures it as an astable multi-vibrator to blink some LED&apos;s.<br><br>Should be powered through 2x CR2032 batteries or through the pins at the bottom. Works between 4V to 15V, but may need higher value dropper resistors for the LED&apos;s when powered by more than 6V.<br><br>A great way to learn soldering some pesky SMD components, mainly 0603 sized resistor, capacitors and LED&apos;s and SOT-23 sized transistors.<br><br>This circuit has not yet been tested, but should work as it&apos;s based on a working model.KiCad files are available, and you can buy the PCB here and help me: <a target="_blank" rel="noopener noreferrer" href="https://www.pcbway.com/project/shareproject/Discrete_555_Blinky_Xmas_Tree.html/">https://www.pcbway.com/project/shareproject/Discrete_555_Blinky_Xmas_Tree.html/</a>