Digital Step-Km Counter

• R1,R3 22K 1/4W Resistor
• R2 2M2 1/4W Resistor
• R4 1M 1/4W Resistor
• R5,R7,R8 4K7 1/4W Resistor
• R6 47R 1/4W Resistor
• R9 1K 1/4W Resistor
• C1 47nF 63V Polyester Capacitor
• C2 100nF 63V Polyester Capacitor
• C3 10nF 63V Polyester Capacitor
• C4 10µF 25V Electrolytic Capacitor
• D1 Common-cathode 7-segment LED mini-display (Hundreds meters)
• D2 Common-cathode 7-segment LED mini-display (Kilometers)
• IC1 4093 Quad 2 input Schmitt NAND Gate IC
• IC2 4024 7 stage ripple counter IC
• IC3,IC4 4026 Decade counter with decoded 7-segment display outputs IC
• Q1,Q2 BC327 45V 800mA PNP Transistors
• P1 SPST Pushbutton (Reset)
• P2 SPST Pushbutton (Display)
• SW1 SPST Mercury Switch, called also Tilt Switch
• SW2 SPST Slider Switch (Sound on-off)
• SW3 SPST Slider Switch (Power on-off)
• BZ Piezo sounder
• B1 3V Battery (2 AA 1.5V Cells in series)