Lasers have enjoyed great popularity for a number of years now. It is quite possible to make a laser at home. You just need to have some skills in working with a soldering iron and distinguish "+" from "-" when installing the circuit.
Instructions
Step 1
If you want to get a powerful laser with a radiation of about 200 mW, then find a suitable DVD with a working carriage and a laser head mounted on it. Decide which glow you want to have, red or blue-violet. Select the beam of the flashlight with the appropriate glow along the wavelength, which varies from 380 nm to 800 nm, by viewing the characteristics of various emitters. Weak radiation can be obtained by removing the same block, but from the CD drive. Both drives must be writers. Receive weak radiation from some printer, barcode scanner, mouse.
Step 2
The design of the drive can be very different. Carefully deal with it so that you can unscrew a few screws without any problems. The laser unit is mounted on a guide carriage, which you can easily remove after removing the fasteners. After that, remove the DVD optical element from the block, having previously "seated" all the leads on the foil, or carefully wrapped with a thin wire, thereby eliminating static breakdown. Decide on each of the 3 conclusions:
- 1 output power supply "+";
- 2 output power supply "-";
- 3 pin is not used.
Step 3
The power supply for the laser diode is 3 volts. Use two "finger" batteries. You can take a regular crown for power, then assemble an additional voltage regulator circuit. This option gives you longer term use of your laser. Find a 10pF ceramic capacitor and a 100uF / 16V polarized capacitor.
Then, according to the reference book, select a stabilizer corresponding to a voltage of 3 V, for example, KR1158EN3V. In addition, select a suitable housing and microswitch.
Step 4
Begin the entire assembly process by soldering the ceramic pot to the laser diode leads, remove the protective foil and solder the polarity capacitor. KREN has three conclusions:
- 1 stabilized power supply + 3V;
- 2 common;
- 3 input voltage.
Again, strictly taking into account the polarity of the stabilizer and the laser diode, unsolder this part of the circuit. Now solder the microswitch into the open circuit of the power supply and the circuit you assembled. Check the assembled circuit and try to turn it on.
Step 5
Carefully pack the received product and place it in the body of the prepared flashlight, after removing the glass from the flashlight. You can make a laser yourself without disassembling the drive, but wandering around online stores and picking up the necessary (or ordering) laser unit.
