coll circuit

There are generally two cases in using car camera with car display, one is the 3.5-or 4.3-inch screen, as long as it has the video signal input, the display will automatically turn on the display board camera images, the other is seven inches or more of the car displays, such displays are generally two-way video input AV1 and AV2, AV2 is usual with the camera, and AV2 have to need a dedicated power line triggered, generally the screen would have connected to switch to AV2 picture to a trigger signal to automatically switch power, just a video signal does not have to automatically switch to AV2, it must be plus a power signal. such as in the use of reversing camera, the trigger signals of AV2 display power have connected to the reversing light power after connecting video cable with display, so that reversing the screen will switch to AV2.
Off-board display is usually the case, after the reverse gear mounted camera will automatically display the picture, Another point to note is that there are some large-size display (10 inches or more of the liquid crystal display, etc.) can not the normal car camera shows the image, because the resolution of the camera will display a minimum resolution of the image does not reveal if switching to 2.4G wireless video transmission to be displayed, because the cameras image through 2.4G wireless video Mediation can be displayed.
Car camera with one car DVD navigation use: generally the case in the boot, but also have a power signal to switch to trigger the camera screen.
Car camera with a portable GPS navigation device: Generally in the boot, automatically switch to the cameras screen as long as the video signal input, no external power supply signal is triggered.

San Bao has a bright flashlight features a portable music speaker SV-605 light treasure box. Speaker built-3000mAh large capacity battery, to meet the long outdoor use.



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San Bao SV-605 portable speaker music light a Box Accessories random

San Bao SV-605 portable speaker music light a Box rated output power of 3W, speakers built-in 1-inch aluminum diaphragm waterproof speakers. Speaker Built-in 3000mAh large capacity lithium battery, portable speakers for the general life of about 3 times. In sound, the speakers tend to sound crisp, and support 3.5mm headphone output to meet the needs of the general listening.

Here is a portable, high-power incandescent electric lamp flasher. It is basically a dual flasher (alternating blinker) that can handle two separate 230V AC loads (bulbs L1 and L2). The circuit is fully transistorised and battery-powered. The free-running oscillator circuit is realised using two low-power, low-noise transistors T1 and T2. One of the two transistors is always conducting, while the other is blocking.
Due to regular charging and discharging of capacitors C1 and C2, the two transistors alternate between conduction and non-conduction states. The collector of transistor T1 is connected to the base of driver transistor T4 through current-limiting resistor R5. Similarly, the collector of transistor T2 is connected to the base of driver transistor T3 through limiting resistor R6. These transistors are used to trigger Triac1 and Triac2 (each BT136) through optotriacs IC1 and IC2, respectively, and switch on the power supply to external loads L1 and L2.
IC1 and IC2 operate alternatively at a low frequency determined by the values of capacitors C1 and C2. The oscillator circuit built around transistors T1 and T2 generates low frequencies. When transistor T3 conducts, IC1 is enabled to ire Triac1 and bulb L1 glows. Similarly, when transistor T4 conducts, IC2 is enabled to ire Triac2 and bulb L2 glows. Connect the power supply line (L) of mains to bulbs L1 and L2, and neutral (N) to T1 terminals of Triac1 and Triac2.
You can also connect neutral (N) line of the external 230V mains supply to both loads (bulbs L1 and L2) as a common line and then route supply line (L) to respective loads (bulbs L1 and L2). The circuit works off only 3 volts. Since current consumption is fairly low, two AA-type cells are suficient to power the circuit. Assemble the circuit on a general-purpose PCB and enclose in a suitable plastic cabinet with integrated AA-size pen-light cell holder. Drill holes for mounting the ‘on’/‘off’ switch and power switching terminals. Also connect two bulb holders for bulbs L1 and L2.
EFY note:
* While assembling, testing or repairing, take care to avoid the lethal electric shock.
Author: EFY Mag
Read more:http://www.extremecircuits.net/2010/05/portable-lamp-flasher.html