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LIGHT SENSITIVE SWITCH

mk125.jpg

Switch-on at dusk, turn off at dawn, fully automatic.

Features
wide-range adjustable sensitivity
delay circuit avoids cycling

Specifications
relay output: NO/NC 24V/5A max.
power supply: 12V DC
with adapter-connector
dimensions: 2.6" x 2.0"
 
Quantity
Price
1 – 9$8.46
10 – 99$7.99
100 +$7.35

  Kit - Basic Soldering Required  
  MK125  
  8  
 
 
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tn_mk125.jpg
LIGHT SENSITIVE SWITCH (Assembled)
 

Switch-on at dusk, turn off at dawn, fully automatic.

Features
wide-range adjustable sensitivity
delay circuit avoids cycling

Specifications
relay output: NO/NC 24V/5A max.
power supply: 12V DC
with adapter-connector
dimensions: 2.6" x 2.0"

NOTE: Please allow 24 hours for assembly!
Price: $21.18
  Assembled and Tested  
  MK125-TBA  
  8  
 
..........................
tn_cps79.jpg
3 LDR Kits in One
 
We provide 3 complete Light/Dark LDR circuits each with a relay on-board. Each is a simple, well-tried circuit: one uses two transistors in a super-Darlington setup, the second uses a LM741 op-amp while the third uses a Schmidt Trigger. Each board has a PCB-mounted switch to convert the circuit from light to dark switching and vice versa. There is nothing original in these circuits - they have been around for years. What we have done is bring three good circuits together all in the one kit for you to build & experiment with.(CPS79)
Quantity
Price
1 – 9$31.01
10 – 99$28.80
100 +$27.84

  Kit - Basic Soldering Required  
  CPS79  
  10  
 
..........................
Click here for specs, downloads, and more pictures!
FK401: LIGHT ACTIVATE SWITCH (LIGHT ON)
 
Features:
  • Electronic circuit that uses LDR to receive light in order to control the relay for on-off of electric home appliances.
  • Power supply : 12V.
  • PCB dimensions : 2.7” X 1.4”
  • Read More...
Quantity
Price
1 – 9$5.75
10 – 99$5.44
100 +$4.99

  Kit - Basic Soldering Required  
  FK401  
  6  
 
..........................
Click here for specs, downloads, and more pictures!
FK404: NIGHT ACTIVATE SWITCH 220V.
 
Features:
  • The circuit can make lighting more convenient by automatically switching on the moon light at night and switching off in the morning.
  • This circuit is suitable for front gate light.
  • Easily installing by using small amount of alternating current (A/C 220V.) only.
  • Power supply : 220V.
  • PCB dimensions : 2.5” X 1.7”
  • Read More...
Quantity
Price
1 – 9$7.57
10 – 99$7.17
100 +$6.57

  Kit - Basic Soldering Required  
  FK404  
  3  
 
..........................
tn_cps79a.jpg
LDR Kit 1
 
Uses two transistors in a super-Darlington setup. By reading about all three Light/Dark Kits you will be able to decide which circuit is the best for your particular application. If your application is in very bright or very dark conditions then you can easily experiment with different resistor values to get better control over the switching range you need. There is nothing original in these circuits. We have taken them from published material (see end of this paper for References.) But we have redesigned them each onto similar PCB's to allow easy comparison. And in addition a light/dark option has been incorporated into each. We say 'light/dark' because each circuit has a PCBmounted switch on-board. In one switch position a light-to-dark transition will activate the relay. In the other position a dark-to-light transition is required. So you can use the light falling on the detector to switch on a normally off circuit, or switch off a normally on circuit. (CPS79A).
Quantity
Price
1 – 9$14.25
10 – 99$13.50
100 +$12.38

  Kit - Basic Soldering Required  
  CPS79A  
  5  
 
..........................
tn_cps79b.jpg
LDR Kit 2
 
"We provide 3 complete and separate Light/Dark LDR circuits each with a relay on-board all in the one kit. Each is a simple well tried circuit: one uses two transistors in a super-darlington setup, the second uses a LM741 op-amp while the third uses a Schmidt Trigger. Each board has a PCB-mounted switch to convert the circuit from light to dark switching and vice versa. There is nothing original in these circuits - they have been around for years. What we have done is bring three good timer circuits together all in the one Kit for you to build & experiment with."
Uses a LM741 op-amp.
PCB dimensions 2.4" x 1.5"
Quantity
Price
1 – 9$14.82
10 – 99$14.04
100 +$12.87

  Kit - Basic Soldering Required  
  CPS79B  
  5  
 
..........................
tn_cps79c.jpg
LDR Kit 3
 
"We provide 3 complete and separate Light/Dark LDR circuits each with a relay on-board all in the one kit. Each is a simple well tried circuit: one uses two transistors in a super-darlington setup, the second uses a LM741 op-amp while the third uses a Schmidt Trigger. Each board has a PCB-mounted switch to convert the circuit from light to dark switching and vice versa. There is nothing original in these circuits - they have been around for years. What we have done is bring three good timer circuits together all in the one Kit for you to build & experiment with."
Uses a Schmidt Trigger.
(CPS79C)
Quantity
Price
1 – 9$14.25
10 – 99$13.50
100 +$12.38

  Kit - Basic Soldering Required  
  CPS79C  
  4  
 
..........................
Click here for specs, downloads and more pictures.
ELECTRONIC CRICKET
 
NEW - LOWER PRICE!
Price was: $7.18

Can be used for fun or to simulate a hot summer night. Automatically comes on when it gets dark. Cricket repetition (time between two crickets), effect and tone adjustable. Adjustable light sensitivity. 

Specifications:
  • consumption: ± 5mA 
  • power supply: 9V battery (not incl.)
  • dimensions: 2.4" x 0.4" x 1.0"
Quantity
Price
1 – 9$6.39
10 – 99$6.09
100 +$5.57

  Kit - Basic Soldering Required  
  MK104  
  6  
 
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