Circuit Project Electronic

Wireless portable unit
Adaptable with most internal combustion engine vehicles

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

Related Links Circuit
More about IC CA3140
More about IC 4069
More about Meter
More about automotive
More about Audio - Alarm
Car Temperature Gauge by IC CA3162 + CA3161
Digital Step-Km Counter with IC 4026,4024
Digital Measurements Temperature by LM335

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