Rangkaian Peringatan Kecepatan Kendaraan

Parts:

• R1,R2,R19 1K 1/4W Resistors
• R3-R6,R13,R17 100K 1/4W Resistors
• R7,R15 1M 1/4W Resistors
• R8 50K 1/2W Trimmer Cermet
• R9 470R 1/4W Resistor
• R10 470K 1/4W Resistor
• R11 100K 1/2W Trimmer Cermet (see notes)
• R12 220K 1/4W Resistor (see notes)
• R14,R16 68K 1/4W Resistors
• R18 22K 1/4W Resistor
• R20 150R 1/4W Resistor (see notes)
• C1,C7 100µF 25V Electrolytic Capacitors
• C2,C3 330nF 63V Polyester Capacitors
• C4-C6 4µ7 25V Electrolytic Capacitors
• D1,D5 Red LEDs 3 or 5mm.
• D2,D3 1N4148 75V 150mA Diodes
• D4 BZX79C7V5 7.5V 500mW Zener Diode
• IC1 CA3140 or TL061 Op-amp IC
• IC2 4069 Hex Inverter IC
• IC3 4098 or 4528 Dual Monostable Multivibrator IC
• Q1,Q2 BC238 25V 100mA NPN Transistors
• L1 10mH miniature Inductor (see notes)
• BZ1 Piezo sounder (incorporating 3KHz oscillator)
• SW1 SPST Slider Switch
• B1 9V PP3 Battery (see notes)
• Clip for PP3 Battery 

Source and details
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