| Arduino Micro | with headers | 1 | 16,90€ | 16,90€ | 
    
      | 0.96” SSD1306 OLED | available from JOY-IT and many others | 1 | 7,30€ | 7,30€ | 
    
      | Electrolytic Cap 22uF | 50V; 2mm pitch;radial | 1 | 0,09€ | 0,09€ | 
    
      | Electrolytic Cap 220uF | 16V;2.5mm(0.1”) pitch;radial | 1 | 0,11€ | 0,11€ | 
    
      | Electrolytic Cap 100nF | 16V; 1.5mm pitch;radial | 1 | 0,02€ | 0,02€ | 
    
      | B40R Bridge Rectifier |  | 1 | 0,25€ | 0,25€ | 
    
      | 1N5817 Diode |  | 1 | 0,05€ | 0,05€ | 
    
      | Pinsocket 1x17 | 2.5mm(0.1”) pitch | 2 | 0,60€ | 1,20€ | 
    
      | RJ12 Socket |  | 1 | 0,40€ | 0,40 € | 
    
      | Pinsocket 1x4 | 2.5mm(0.1”) pitch | 1 | 0,17€ | 0,17 € | 
    
      | Pinheader 1x2 | 2.5mm(0.1”) pitch | 1 | 0,05€ | 0,05 € | 
    
      | Inductor 300uH | 5mm(0.2”) pitch;radial | 1 | 0,31 | € 0,31 € | 
    
      | LED 3mm | 2.5mm(0.1”) pitch | 6 | 0,12 € | 0,72 € | 
    
      | 4n35 opto couple | DIP-6 package | 2 | 0,26 € | 0,52 € | 
    
      | 2N3904 Transistor | TO-92 package | 2 | 0,05 € | 0,10 € | 
    
      | 2N3906 Transistor | TO-92 package | 1 | 0,05 € | 0,05 € | 
    
      | 47kOhm Resistor | Metal 1%; 0207 | 1 | 0,08 € | 0,08 € | 
    
      | 4.7kOhm Resistor | Metal 1%; 0207 | 1 | 0,08 € | 0,08 € | 
    
      | 150kOhm Resistor | Metal 1%; 0207 | 1 | 0,08 € | 0,08 € | 
    
      | 22kOhm Resistor | Metal 1%; 0207 | 2 | 0,08 € | 0,16 € | 
    
      | 10kOhm Resistor | Metal 1%; 0207 | 3 | 0,08 € | 0,24 € | 
    
      | 1kOhm Resistor | Metal 1%; 0207 | 2 | 0,08 € | 0,16 € | 
    
      | 2.2kOhm Resistor | Metal 1%; 0207 | 1 | 0,08 € | 0,08 € | 
    
      | 620Ohm Resistor | Metal 1%; 0207 | 1 | 0,08 € | 0,08 € | 
    
      | 300Ohm Resistor | Metal 1%; 0207 | 8 | 0,08 € | 0,64 € | 
    
      | LM311 Comparator | DIP-8 | 1 | 0,34 € | 0,34 € | 
    
      | LM2574N-5 Sw. Reg. | DIP-8;5V Step-Down Switching Regulator | 1 | 1,60 € | 1,60 € | 
    
      | LNGateway PCB | Depends on manufacturer | 1 | 7,00 € | 7,00 € | 
    
      | Total: |  |  |  | 38,78 € |