Introduction: Auto Test Pen With Double Function
Hello, friends.
Today we are going to do here is a probe car. It has two functions, namely - a show contact with the car body, as well as the presence of a voltage of 12 volts.
Detailed assembly and demonstration work can be seen on the video.
Step 1:
We need
- Syringe 5 cubes;
- 4 LR44 batteries;
- Two LEDs with a resistor;
- A piece of steel wire;
- Wire with a clip at the end;
Step 2: Very Simple Scheme
Step 3: Oppositely Connect Two LEDs
Step 4: Solder Resistor, Steel Wire, and Fill It With Hot Glue
Step 5: Bend the Contact and Put Into a Syringe
Step 6: Put the Battery
All is ready.
Detailed assembly and demonstration work can be seen on the video.
Thank you for attention.
3 Comments
6 years ago
I like this more than a test light- only works in one direction, uses less energy- but still more dangerous than a multimeter
6 years ago
this clever, i worked on a design for multi-function tester, if i make it post
Reply 6 years ago
Of course make.
If you make a link to my device - I will be very grateful.