1.   

Frost Alarm or Cold Activated Switch

  2.   

Dark Activated Switch or Porch Light Switch

  3.   

Electronic Keypad

 by Ron J

  4.   

Light Detector Circuit

 by Mick Devine

  5.   

DC Push Button Motor Control Circuit

  6.   

Push Button Switch Debouncer

  7.   

Remote Doorbell Indicator

  8.   

Doorbell with Counter

  9.   

Digital Combination Lock

  10.  

Electronic Night Light

  11.  

Sound Operated Switch

  12.  

Voltage Comparator Switch

  13.  

DC Motor Reversing Circuit

  14.  

Water Activated Relay

 by Marin Lukas

Return to 

Schematics

Click to buy NOW!

P

D

F-

XC

hange Vie

w

er

w

w

w

.d oc

u -tra c

k.

co

m

Click to buy NOW!

P

D

F-

XC

hange Vie

w

er

w

w

w

.d oc

u -tra c

k.

co

m