Guide: SLR camera is increasing in life, single-reverse camera function is full, setting flexible, good shooting, but the shooter of SLR cameras can also take themselves in the picture. Now this article will give you a DIY wireless shutter to solve this problem.
As the price of SLR cameras is getting lower and lower, people have gradually begun to perform a unique momentum of SLR cameras. On the one hand, single-reverse cameras have functions, setting flexible, good shooting effect, and also meet people on the other hand. Vanity. However, with the continuous in-depth and application of the SLR camera, it is found that SLR cameras also have certain limitations. For example, the photographer can only take pictures of others, and it is impossible to shoot themselves. Regret. In the face of this problem, I think of the first thing as a technology house is: If you can use the wireless shutter, you can solve it. Search from the Internet, less than dozens of dollars, more than a few hundred yuan wireless shutter products make me very don't catch a cold, so expensive!咱 咱 技术 技术 技术 's DIY spirit! Talk to dry! let's go!
I. Interface definition of external shutter line:
Search from the Internet to know the external shutter line interface of the SLR camera is defined as follows: Use a headphone plug with a diameter of 2.5mm.
Second. The principle of the wireless transmit department:
As shown below:
The entire transmitting department is powered by a lithium battery. The charging interface uses Micro-USB. Most of the Andriod mobile phone chargers can be charged to charge it. It is convenient to charge at any time; because the wireless transmit module is powered by 5V power, while the lithium battery voltage is generally at 3.0V-- Between 3.7V, it designed a DC-DC boost pad that allows boosting of the power supply to input 0.8V or more, output 5V, 200mA, fully meet the power supply needs of the entire system. The transmit circuit is a PT2262 wireless module purchased directly from the Internet. It has a 4-way input signal, that is, it can control 4 output, and the wireless shutter only needs two signals: a focus signal, a shutter signal. The focus button and the shutter button uses a normal self-amminal mechanical buttons, and the general life is more than 20,000 times. Even if it is broken, you can always replace the new button. An LED indicator is also designed in this circuit to indicate the power to open / close state.
Third. Schematic diagram of wireless receiving part:
As shown below:
The same design is used with the power supply of the transmit portion, and the lithium battery is used, and the Micro-USB interface is used to charge it, and the DC-DC board is boiled to 5V. The receiving module uses PT2272, with PT2262, the transmit address is consistent with the receiving address, otherwise the data cannot be received normally. Since the level on the shutter interface is reversed with the effective level signal output from the PT2272, the NPN triode is added to the level of level to meet the requirements of SLR cameras.
Four. Assembly and debugging:
The whole family of launch and receiving part is as follows:
First, punch the plastic housing to mount the switch, focus button, shutter button and other components. All circuits are then soldered one by one according to the corresponding schematic. The PT2262 transmit module is then set to the PT2272 receiving module as an uniform address. Finally, open the power switch of the transmitting module and the receiving module, check if the power indicator is light; press the focus button, check whether the level of the focus output on the receiving module becomes low, the same check shutter button, shutter Whether the output has become low. After these works, ensure that the headphone plug of the wireless receiving portion is inserted into the shutter jack of the SLR camera, turn on the camera power, and press the shutter button again, and the magical scene appears: Just listen to "咔" ", the camera filmed a photo! Like the sister of self-portrait, pick it up!
At this point, I'm big! Dear, hurry to DIY!
Finally, there are several physical pictures:
Small plastic box:
2. Picture of the transmitted part welding:
The left is the power switch, the micro-usb charging port; the white line is an antenna of the transmit module; the hole in the upper right corner is left to the LED indicator. The two buttons in the lower right corner are focusing and shutter buttons.
Closeup of focus buttons and shutter buttons
Power button and micro-usb interface close-up
3. Receive partial welding completion diagram:
The receiving portion, simply insert the headphone plug into the shutter jack of the SLR camera, turn on the power switch.
4. Take a photo test:
Compare ergonomics, huh, huh.
complete! thanks for watching!
Bamboo
About the author: Du Shanwu, Net Name: Dushanwu, currently engaged in the development, testing of LCD modules, including monochrome LCD, LCM, color screen module development, display driver writing, commissioning, etc. The products mainly include: S3C2440 color screen test system, can run, can run the WinCE system; liquid crystal display module with RS232 interface; liquid crystal display module with USB interface; high temperature aging test system for liquid crystal display module; segment code LCD display Short-circuit detection system; etc. I like photography, travel, skateboard, DIY.
Contact: QQ123469216 Mailbox:
[email protected]
[Activities] Participate in the panel essay activities, win the intelligent prize!
Our other product:
