As shown in the figure, the traffic light traffic light automatic control circuit. The controller is mainly composed of four 555 (IC2~IC5) and four-stage monostable delay circuits composed of some RC components. The input 8V voltage is regulated by 78M05 to provide 555= VDD=+5V supply voltage.
When the power is first turned on, the trigger pulse is delayed by the IC1 (CD4011) gate circuit and R1 and C1, and then added to the IC22 pin after being differentiated by C2 and R22. The IC2 outputs a high level and enters the transient steady state. The timing of the timing depends on the position of K1. The delay time is td=1.1RC6, and the set time is 60 seconds, 45 seconds, and 30 seconds, respectively. At the end of the transient steady state, the IC23 pin is at a low level, and after being differentiated by C3 and R23, the falling edge triggers IC3 again to form a second-stage monostable delay. In this way, the timing is triggered in sequence, and the green light is turned on - the yellow light is on (8 seconds, 10 seconds, 12 seconds) - the red light is on (60 seconds, 45 seconds, 30 seconds).
The controller is connected end-to-end through the four-level circuit, and the time delay is triggered to make the traffic light appear green-yellow-red (color) signal in sequence, and the pedestrian and the vehicle are commanded to pass in an orderly manner on the crossroad I=1 (green) - reminding attention (Yellow) - No access (red).
Solder Cup Waterproof D-Sub Connector
The Solder Cups D-sub connector, also known as Solder Cups D-sub connector , typically contains a pin layout of 9 pin, 15 pin, 25 pin, 37 pin & 50 pin positions housed in increasing shell sizes accordingly. They are available in both male (plug) and female (socket) variants with the male signal contacts/pins (current rating of 5A) spaced every 2.76mm in horizontal rows and the spacing of rows vertically at 2.84mm laid out half the distance between pins of existing rows.
IP66 IP67 Rated Waterproof D-Sub Panel Mount Solder Connectors
Harsh outdoor or indoor environments can destroy electronic equipment. Standard D-sub connectors are not intended to withstand contaminants such as water and dust. These waterproof solder cup connectors are available in male or female genders and DB9, DB15, DB25, and HD15 sizes. They will accommodate wire ranges from 30 - 20 AWG. Construction features gold plated brass contacts, nickel plated steel shells, and a silicone insulating ring. Maximum recommended panel thickness is 0.078".
Antenk offer a wide range of waterproof standard density and high density male and female high density D-Sub connectors solder cup with stamped and formed Contacts in cable mount used in a variety of demanding applications.
Antenk's Solder Cup D-Sub Connectors Stamped contacts
FEATURES
Solder cup d-subs available in industry sizes/positions
Low cost economy series.
Nickel shells have indents to provide grounding and additional retention.
Low cost & high performance, non-removable stamped contacts.
Optional mounting hardware available.
Antenk's SOLDER CUP D-SUB CONNECTORS Stamped contacts
MATERIALS
Shell: Steel, Tin or Nickel Plated
Insulator: Glass-filled thermoplastic. U.L. rated 94V-O
(230°C process temp)
Stamped contacts: Male pins - Brass | Female pins - Phosphor bronze
Plating: Gold flash on entire contact (contact us for other plating options)
Solder Cup Waterproof D-Sub Connector Stamped & Formed Contact, Solder Cup Waterproof D-Sub Connector Machined Contacts, Waterproof Panel Mount Solder Cup D-Sub Connector
ShenZhen Antenk Electronics Co,Ltd , https://www.antenk.com