today i'm gonna show you how to make a really simple touch switch
Step 1: Watch the Video
The video is in my youtube channel Christopher Tjia (i chage my channel name). Link:
Step 2: The Schematic
Step 3: Buy All of the Components
The components for this project are:
2pc BC547 transistors
1pc 10k ohm resistor
1pc 1k ohm resistor
1pc 740 ohm resistor
1pc 9V battery clip
1pc 9V battery
Step 4: Connect the Two Transistors
first, connect the base pin of the first BC547 to the emitter pin of the second BC547
Step 5: Connect the Led
Then, connect thenegative pin of the led to the collector pin of the first BC547 transistor
Step 6: Connect the Resistors
connect the 1k ohm resistor to the second BC547 transistor and the 470 ohm to the positive pin of the led.
Step 7: Connect the Resistor Again
solder the 1k ohm resistor to the 470 ohm resistor and connect the 10k ohm resistor to the basee pin ot the second BC547 transistors.
Step 8: The Final Connection
finnaly connect the positive wire of the 9V battery to the1k ohm resistor and the 470 ohm resistor. then the negative wire of the 9V battery clip is connected to theemitter pin of the first BC547.
Step 9: Testing
if you connect every thing correctly then if you tuoch te 10k ohm resistor and the positive wire of the 9V battery clip, the led will turn on.