The circuit can automatically open and close related appliances according to the brightness of light. Its output is controlled by the relay, which can directly replace the original manual switch. (If you replace the photosensitive resistance of this circuit with other sensitive resistors, you can make other automatic switches, such as temperature control switches, etc.).
5-12V is available. The coil voltage of the relay is 5V by default and the measured working voltage is 4-12V. If you work long hours in high voltage conditions, recommend replacing the relay with 9-12V.
It is the Schmitt trigger of the circuit with the circuit U1 at the base of NE555.The photosensitive resistor is the input signal of the RP1 series.Adjusting RP1 can change the light intensity control point.C1 is the interference signal absorption capacitance.When the light is very bright in the daytime, the RG resistance is small, the input voltage is higher than the reference voltage voltage (5 feet pin), the output low level 3 feet pin, VT1 cut-off, relay doesn't work, losing electricity output switch (1, 2 feet of JP1), with electric does not work.When the light dimmed, RG resistance increasing, the input voltage is falling, when the voltage is less than half of the reference voltage, the trigger flip, 3 feet, output level VT1 conduction, relay electric off, with electric start work.
When the input voltage is between the reference voltage and the reference voltage of 1/2, the circuit maintains its original state.This is conducive to the stability of the circuit.Adjusting RP2 can change the reference voltage, thus changing the control brightness range and the starting point.The RP2 and RP1 need to be adjusted repeatedly to achieve the required degree.Switch signal output from JP1, its often opened on the choice of normally closed contact according to the need to be sure, can be directly driven 220 V/prefix = st1 ns = "urn: schemas - Microsoft - com: office: smarttags" any electrical appliances within 3A, to achieve automatic switch (such as street lamps, etc.). The LED is a dual-color, and the relay fails to absorb the red light and is used as a power indicator. After the relay is closed, the red light is out and the light is green.
|NO.||Component Name||PCB Marker||Parameter||QTY|
|1||Metal Film Resistor||R1-R3||1K||3|
I. Tested by ICStation's Outstanding Partner bzoli5706:
Learn More Details in the Video:
(The language in the video is English)
II. Tested by ICStation's Outstanding Partner Lukas Ekers:
Learn More Details in the Video:
(The language in the video is Music)
First we should say that ICStation doesn't accept any form of pay on delivery.Items used to be shipped after receiving the order info and payment.
1) Paypal Payment
PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account).
We are PayPal Verified
2) West Union
We know that some of you do not have the Paypal account.
Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$500. The bank will charge about US$60 for the transfer fee if we do the payment in these ways.
For other payment method, please contact us at email@example.com for more details.
1. Hongkong / Sinapore Airmail
(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $3 is for tracking number and delivery insurance ^0^ Enjoy order from us.
Free Shipping for all orders over $20 ^0^ (with free tracking number and delivery insurance fee)
(2) Shipping time
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location.
7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries
2. EMS/DHL/UPS Express
(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG
When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country.
Asia: Japan , South Korea , Mongolia . Malaysia , Singapore , Thailand , Vietnam , Cambodia , Indonesia , Philippines
Oceania: Australia , New Zealand , Papua New Guinea
Europe& America: Belgium, Britain, Denmark, Finland, Greece, Ireland, Italy, Luxembourg, Malta, Norway, Portugal, Switzerland, Germany, Sweden, France, Spain, USA, Austria, Canada
Note: Shipping Fee to other countries, please contact orders@ICStation.com
(2) Shipping Time
Shipping time is 3-5 working day (about 1 week) to most of countries.
Because the package would be returned to the sender if it had not been signed by the receiver in 2-3 day (DHL) or 1 week (EMS,) or 2 weeks (Registered Email), please pay attention to the arriving time of the package.
1) APO and PO Box Addresses
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed.
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc.
3) Once your order is shipped, you will receive an email notification from icstation.com
4) Track the order which with tracking number via below links: