Introduction: Dark Sensor (no Breadboard or Solder)

Picture of Dark Sensor (no Breadboard or Solder)

In this Instructable I will make a dark sensor without using a breadboard, solder or a printed circuit board.

Step 1: What You Need

Picture of What You Need

What you need-

1 9v battery clip (I made mine)
1 LED
1 Photoresistor
1 switch
1 transistor (BC547)
2 resistors (I don't know their ratings)

Step 2:

Picture of

Connect one wire on the switch to one wire on the battery clip. I twist the wires to connect them.

Step 3:

Picture of

Attach one wire from the LED and one wire from the Photoresistor to the one wire on the switch that is not connected to the battery clip.

Step 4:

Picture of

With the LEDs wire that is not connected to the switch Attach it to the emitter on the transistor. The emitter on this transistor is the wire to the right when you look at its flat side.

Step 5:

Picture of

Now connect the base (the middle wire) on the transistor to the Photoresistor's wire that is not connected to the switch.

Step 6:

Picture of

Now with the collector wire (the left wire) connect the resistors. The resistors will reduce current going to the LED so it won't burn out.

Step 7:

Picture of

Now connect the resistor wire that is not connected to anything else on to the other side of the battery clip. Its finished! :)

Comments

About This Instructable

620views

11favorites

License:

Bio: Comment what I should make. I will try to make anything with what I have.
More by John_Singleton_:Airsoft Gun Coil Gun Airsoft Ammo Capacity HackDIY EDC Pen Spear
Add instructable to: