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Park Aid Circuit

2017-08-05 01:53  
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This article is to introduce the park aid circuit. The circuit has three led signal buffering distance barrier, infrared operation, indoor use. Before you read this diagram, we give you about an important component of the circuit 1N4148 . The 1N4148 and 1N4448 are high-speed switching diodes fabricated in planar technology, and encapsulated in hermetically sealed leaded glass SOD27 (DO-35) packages.1N4148 features are:
• Hermetically sealed leaded glass SOD27 (DO-35) package
• High switching speed: max. 4 ns
• General application
• Continuous reverse voltage: max. 75 V
• Repetitive peak reverse voltage: max. 75 V
• Repetitive peak forward current: max. 450 mA.
1N4148 applications are:
• High-speed switching.
Park Aid

R1_____________10K   1/4W Resistor
R2,R5,R6,R9_____1K   1/4W Resistors
R3_____________33R   1/4W Resistor
R4,R11__________1M   1/4W Resistors
R7______________4K7  1/4W Resistor
R8______________1K5  1/4W Resistor
R10,R12-R14_____1K   1/4W Resistors

C1,C4___________1μF  63V Electrolytic or Polyester Capacitors
C2_____________47pF  63V Ceramic Capacitor
C3,C5_________100μF  25V Electrolytic Capacitors

D1_____________Infra-red LED
D2_____________Infra-red Photo Diode (see Notes)
D3,D4________1N4148  75V 150mA Diodes
D5-7___________LEDs  (Any color and size)

IC1_____________555  Timer IC
IC2___________LM324  Low Power Quad Op-amp
IC3____________7812  12V 1A Positive voltage regulator IC


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