As always, glad You welcome to the site of technical creativity.
Today we will talk with you and try to make simple, but necessary homemade from the same uncomplicated subject. A simple item with you will be an ordinary fountain pen, ink pen.
As always, in detail. When making any homemade product from a package of questions, there are always two of the following. Select or manufacture the housing based on the dimensions of the components, or select components based on the dimensions of the housing. Let us dwell on the second option. A simple fountain pen caught my eye in a stationery store and I realized that her life would not be spent in a battered schoolbag. Her destiny is to serve real brutal electric men. The hand itself reached for the wallet.
Having brought home, I immediately opened the purchased device and made sure that there was enough space inside this unit to make a useful male device.
And today we will do the necessary under the tree. Namely, the “Bipolar single modular photon reflector is reusable application”, and if just in human language, no kidding, a universal probe for short circuit, open circuit and the presence of voltage in the DC circuit 12-32 volts, which is definitely useful car enthusiasthome master to the summer resident and in general a real man working with low-voltage DC circuits.
The device is manufactured very simply and also very quickly. If you do not have this device in the future, at the right time at hand, you will miss it very much and you will become very sad.
You will remember the mother-in-law who needs to be taken to the market, or the wife who needs to be taken away from work.
All details for this device are absolutely available both by availability and by price level.
As always, it is better to watch than read, I suggest that you familiarize yourself with the homemade product in detail by watching a detailed video clip instruction.
Video instruction for making a simple device for a man familiar with an electrician:
A little about safety when working with electric and heating appliances. Think well with your head, and then act with your hands, in this situation everything will always be good and even excellent.
So, let's begin.
The principle of operation of our device is based on the passage of current diodes in only one direction.The electric circuit of the device consists of two parallel-connected LEDs buy cheap on aliexpress soldered in parallel, but with different polarity, the power supply consisting of 3 "button" batteries is also included in the circuit Button batteries can be found here on AliExpress. and constant resistance to protect the LEDs from overvoltage. Here is such a simple electrical diagram of our device.
1. When the circuit is closed, a constant voltage is supplied from our batteries to the LEDs, the (white) LED lights up, the other LED (red) is closed. This circuit closure option is used to check for open circuits, short circuits, relay contacts, health checks on incandescent bulbs, and so on.
2. The second option. We supply voltage of 12-32V to the device contacts. If there is voltage (white), the LED is closed, (red) lights up. This option is used to check the DC circuit for voltage. This option will be in demand by any car enthusiast who is more or less versed in electricity.
What we need for the manufacture of our universal probe, but we need the following:
Instrument manufacturing tools:
1. A soldering iron, for example, like this - with adjustable temperature 60 W / 80 W. and electronic indication AliExpress
2. Jigsaw, hacksaw.
3. Drill or drilling machine - DEKO Cordless Drill with AliExpress
4. Drills - with titanium coating 50 pcs. AliExpress
5. Stationery knife.
6. Scissors.
7. Pencil, felt-tip pen.
8. Ruler, vernier caliper.
9. Needle files. Small file
10. Abrasive skin.
11. If possible and as desired - AliExpress Third Hand Soldering Iron Stand
Materials for the manufacture of a probe of electrical circuits:
1. A fountain pen, which will be at hand, it will be necessary to make an independent layout of parts in the device.
2. LEDs two colors - A set of LEDs 6 colors 120 pcs. AliExpress
3. Wires for installation.
4. Solder for soldering, available here - Lead-Tin Solder Rosin Core AliExpress
5. The resistor is 300-400 ohms.
6. "Button" batteries 1.5 volts 3 pcs., Size based on the dimensions of your device - Button batteries can be found here on AliExpress.
7. A small piece of plastic or wooden block
8. Glue.
9. Heat Shrink Tubing purchase at AliEXpress for isolation of soldering places, etc.
The procedure for manufacturing a universal probe:
1. Carefully disassemble the pen case.
2. Prepare the spring, as shown in the video instructions posted above.
3. On a small piece of wire solder the contact "patch".
4. We drill and grind the pen holder of the fountain pen.
5. We assemble the lower part of our device, as shown in the video instruction.
6. We solder the LED block.
7. To the LED block, on the one hand, solder a 300-400 ohm resistor. And a contact from a thin metal tube, on the other hand, solder a wire with an electric probe.
8. We assemble the design of the device, not forgetting the batteries.
9. We check a universal probe for testing low-voltage DC circuits in operation.
10. Carefully put our device in the glove compartment of the car. We use it for a long time and with pleasure!
And today Friends, that’s all. Come in with joy, watch and read with pleasure, criticize objectively. Any criticism on the merits is accepted ...
