Some general remarks:
• All components that are difficult to distinguish (e.g. resistors) are clearly labeled with their respective value (e.g. “100 pF”).
• The integrated circuits and the diode are sensitive to electrostatic discharge – it is good practice to use a grounded wrist strap to avoid damage to them during assembly, and to place all the components on an antistatic surface. Don’t wear clothes that get easily charged up (e.g. wool sweater).