Scheme¶

Parts¶

• U1: PIC 16F84-04 (or PIC 16C84-04)
• U2: ICL 7660
• Z1: BAT 43
• R1: 20 kΩ
• R2: 1 kΩ
• C1: 10 µF / 16 V
• C2: 10 µF / 16 V
• X1: 4 MHz
• CONN1: DB9 male
• CONN2: DB9 female
• CONN3: DB9 female