在few of my previous articles we discussed a handful of GSM remote control circuits using ordinary cell phones as the modem. All those designs incorporated the ringtone of the cell phone as the triggering signal. In this post we'll learn how the same could be achieved but by using the vibrator feature of the modem cell phone.
使用振动模式作为触发
In our previous GSM remote control designs we used those cellphones as the modem which had the specific ringtone selection facility for a specific assigned number, here the modem will need to have a vibrating feature for the specific assigned number selected as the triggering number, this is important in order to achieve a fool proof operation of the system.
The idea is simple, it's to detect the vibration from the cell phone body, convert it into a toggling signal and control the desired load or gadget ON or OFF.
使用振动信号检测和三角ger a relay, we'll need a vibration detector circuit as shown in the following diagram:
电路原理图
晶体管放大器
The circuit is basically a transistorized high gain amplifier where a piezo is used as the vibration sensor.
The vibrations from the piezo generates a correspondingly oscillating voltage at the base of T1 which is appropriately amplified by all the following transistor stages consisting of T2, T3, T4, T5, T6 and the associated parts.
最终在连接的继电器上施加了放大的直流信号，该继电器响应于压电上的检测到的振动。
由于手机振动可能会产生不一致的振动速率，可能会导致继电器切换的相应振动响应。
为了避免这种情况，应直接连接到500UF范围内的高价值电容器，并在T6的发射器上连接，这将确保T6即使手机振动间歇性地缺乏，T6也可以维持其传导。
翻板电路
In the above mode, the relay stays activated only for so long as the vibration signals are produced, in order to translate the reaction into a toggling effect a flip flop circuit becomes imperative. The following simple 4093 IC based design becomes perfectly compatible for the required conversions.
输入触发器可以连接到继电器的极点，而继电器的N/O则需要与电源的正相连接。
Alternatively, the relay could be entirely eliminated, and the "input trigger" of the above flip flop circuit directly connected with the collector of T6.
Once this is done the relay would respond with alternate ON/OFF toggling motion each time the modem cellphone is called by the owner or the user.
触发器的继电器可用于切换任何所需的设备，或者如果将其部署在车辆内部，则可以实施以操作中央锁和点火系统，以实现完整的手机操作的安全性安全功能。
使用压电作为传感器
在第一个振动检测器电路中，C1可以是0.22UF电容器，只有在距电路更长距离终止压电的情况下，才必须使用C1，否则可以忽略C1。
Preferably the piezo must be situated close with the circuit board.
压电传感器是一种27毫米普通设备，通常在压电蜂鸣器电路中使用。
It must be appropriately housed inside a塑料外壳for ensuring an optimal response from it.
The entire unit may be further enclosed inside a plastic box with the piezo assembly stuck on inner top surface of the box.
The modem cellphone must be directly placed over the above enclosure right on the outer opposite surface of the piezo assembly (see figure below)
The modem must be appropriately secured over this position so that the unit does not tumble away from the box while vibrating.
Now your cellphone vibrator based remote control circuit is ready and may be used for any desired GSM based remote control application and may be switched from any part of the world, just with a flick of a button.
Make sure that the vibrator is assigned to turn ON only for the specific numbers and not for the default numbers to ensure a foolproof operation of the unit.
Dear Swagatam , I tried this. Very useful circuit indeed. The first part of the circuit
(vibration detector)working like a charm. But the flip flop is not working in my case. I
skipped the relay associated with the vibration detector and decided to use the the relay
触发器控制负载，但不起作用。让我知道是否在4093中
flip flop I should connect the pin 7 to the ground and pin 14 to the positive of the supply
as a standard configuration of the IC. I connected everything else as per your description.
不知道出了什么问题。请帮忙。
谢谢Sanjoy，我很高兴知道您可以成功地做到这一点。
是的，肯定您需要将IC的PIN＃7和PIN＃14连接到供应导轨，否则它将无法使用，因为这些是IC的电源引脚，并且需要与各自的供应连接铁轨。
Swagatam，我遵循您的答复，但触发器仍无法正常工作。我使用1 NF聚酯电容器为C1，我尝试将值更改为.22 MFD（尽管C1和Piezo元素之间连接的电线I的长度约为2也只有英寸），但不起作用。同样，基于4017的触发器也无法正常工作。在基于4017的电路中，我使用12V SMPS适配器作为振动检测器的电源和12 v / 500 mA变压器（如电路所示）进行触发器的供应。在4017电路中，I将触发点连接到触发点，T6的收集器。我毫无疑问地在哪里出错。当我跳过振动探测器的继电器时，让我知道一件事，同时将其与flop拖失板一起用于电路，我应该将T6的收集器直接连接到地面，或者应该将二极管连接到振动探测器的收集器和地面之间。我还在T6的基部和发射极之间使用了470 MFD/25V电解帽，在该底座上连接了盖子的阳性。到发射极端。请帮助我纠正问题，以便至少一个触发器电路正常工作。
Sanjoy, remove the flip flop circuit from T6 and check it separately by manually touching the trigger input momentarily with the positive line. If the circuit does not respond then there could something not correct with your connections or the IC, confirm it by rechecking all the points….you can also check by connecting an LED in series with the base resistor R3 of T1, ths LED should illuminate ON/OFF in response to the triggers at the input of the flip flop circuit.
you don't have to connect anything across T6 collector and ground…it should be directly connected with the trigger input of the flip flop, and also remove the 470uF since there's already C6 present.
both the flip flop designs are absolutely correct and has been tested thoroughly, so both should work if done correctly.
感谢您再次及时回复…。
你好，
I need some help putting together a lock system that I can open and close remotely via a cell phone. I have tried the internet but am unsure if any of the projects can fit my needs. It has to be dc and the lock must stay closed and only open for a brief period of time allowing access to the box. Once the box is closed again the lock must lock automatically, if possible. The device must be fairly small and fit into a suitcase about 1/2 the size of carry one suitcase. I need to lock up medications and restrict access until I release the meds for use.
Do you have any ideas that might help? I have very limited knowledge of electronics (1 EE course as an undergrad decades ago) but I can follow instructions fairly well.
Any help would be appreciated!
嗨，为此，您将需要一个单独的手机与接收器单元永久连接，以操作盒子锁。此外，附件的手机必须具有仅针对特定数字生产铃声的设施，并且必须对所有其他数字保持沉默。该接收器手机响应的特定号码将是您的电话号码。然后可以将此铃声用于触发接收器电路并打开盒子，因此，它变成了万无一失的电路