On-board bicycle network
The season has already begun, and many cyclists began to visit the idea of creating an onboard network for a bicycle. In order for a bicycle ride to use a flashlight, turn signals, brake lights or a music system, and not only while driving. And besides, it would not be out of place to be able to charge a phone, smartphone, or camera. Here is one of these letters: “Hello. I offer you the idea of a product for the section auto-moto-bicycle (although it is clearly for a bicycle, of course). This is a kind of universal charger for recharging batteries and powering light elements on bicycles with electric generators. The problem is that during parking the whole world goes out, because no battery This device must be connected to the dynamo, be able to recharge a small battery, display its charge level, and, of course, power the lighting devices while moving. ”
We don’t have a finished device, but in this article we’ll tell you how to create an onboard network for a bicycle based on Master Keith modules.
As a source, we take the usual bicycle generator "bottle" type, for example, such as the more versatile:
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For the minimum onboard network, we need three modules. These are BM037 , PW810 and NT800 .
BM037 is a pulsed step-down DC / DC converter. In the circuit, it will be used as a rectifier for converting an alternating voltage of a simple bicycle generator, “bottle” type, into a constant voltage. If necessary, a diode rectifier with a high-capacity electrolytic capacitor can be used instead of this module.
PW810 is a pulse universal DC / DC converter. The module is able to both reduce and increase the input voltage. Since the generator has an unstable output voltage when moving, it strongly depends on the speed of movement, with the help of this converter we will get a stable voltage of the on-board network.
When using these two devices, we can get a stable output voltage from 5V to 12V. The required voltage is set using the controller on the PW810 module. But with such a switch on, when stopping in the onboard network, the generated voltage by the generator will disappear. To prevent this from happening, you need to add an NT800 battery to the circuit. This inclusion will allow the use of the on-board network when it stops and will increase the power of the system, which will allow you to connect more devices. And in the process of movement on the bike will be the process of charging the battery.
In addition, the article says: Instead of NT800, you can use any battery you have on hand with an operating voltage of 3.7V, 6V or 12V.
Wiring diagram of the modules can be seen in the figure:
It was not difficult. It can be repeated by any person, even unfamiliar with electronics. Setting up the scheme also does not cause any difficulty. Connect the laboratory power source instead of the generator or spin the wheel on which the generator is installed. Now, using the voltage regulator on the BM037 module, it is necessary to limit the maximum output voltage to 26V. Using the voltage regulator on the PW810 module, you must set the output voltage of the battery used, in our case 13.8V. Now bring the cable from the battery to the necessary outlets, such as a car cigarette lighter, and use any favorite gadgets without worrying that they are discharged at the most inopportune moment.
If you need to have in the on-board network is not a standard voltage, below 12V, for example 5V or 2.4V. To do this, you can connect to the battery terminals step-down DC / DC converter PW841 :
This converter is equipped with two upper displays for displaying the output voltage, the lower one for displaying the current consumption. This will allow you to monitor the status and current consumption of the connected devices.
If desired, the battery can be equipped with the MP606 charge control module:
The module is connected parallel to the battery terminals. Despite the fact that the module has a very low power consumption, only 10 mA, it is recommended to switch it off during long stops. This module can also be useful in any other technology that uses a battery, such as a scooter, car, etc.
Then the final version will look like according to the scheme:
We don’t have a finished device, but in this article we’ll tell you how to create an onboard network for a bicycle based on Master Keith modules.
As a source, we take the usual bicycle generator "bottle" type, for example, such as the more versatile:
')
For the minimum onboard network, we need three modules. These are BM037 , PW810 and NT800 .
BM037 is a pulsed step-down DC / DC converter. In the circuit, it will be used as a rectifier for converting an alternating voltage of a simple bicycle generator, “bottle” type, into a constant voltage. If necessary, a diode rectifier with a high-capacity electrolytic capacitor can be used instead of this module.
PW810 is a pulse universal DC / DC converter. The module is able to both reduce and increase the input voltage. Since the generator has an unstable output voltage when moving, it strongly depends on the speed of movement, with the help of this converter we will get a stable voltage of the on-board network.
When using these two devices, we can get a stable output voltage from 5V to 12V. The required voltage is set using the controller on the PW810 module. But with such a switch on, when stopping in the onboard network, the generated voltage by the generator will disappear. To prevent this from happening, you need to add an NT800 battery to the circuit. This inclusion will allow the use of the on-board network when it stops and will increase the power of the system, which will allow you to connect more devices. And in the process of movement on the bike will be the process of charging the battery.
In addition, the article says: Instead of NT800, you can use any battery you have on hand with an operating voltage of 3.7V, 6V or 12V.
Wiring diagram of the modules can be seen in the figure:
It was not difficult. It can be repeated by any person, even unfamiliar with electronics. Setting up the scheme also does not cause any difficulty. Connect the laboratory power source instead of the generator or spin the wheel on which the generator is installed. Now, using the voltage regulator on the BM037 module, it is necessary to limit the maximum output voltage to 26V. Using the voltage regulator on the PW810 module, you must set the output voltage of the battery used, in our case 13.8V. Now bring the cable from the battery to the necessary outlets, such as a car cigarette lighter, and use any favorite gadgets without worrying that they are discharged at the most inopportune moment.
If you need to have in the on-board network is not a standard voltage, below 12V, for example 5V or 2.4V. To do this, you can connect to the battery terminals step-down DC / DC converter PW841 :
This converter is equipped with two upper displays for displaying the output voltage, the lower one for displaying the current consumption. This will allow you to monitor the status and current consumption of the connected devices.
If desired, the battery can be equipped with the MP606 charge control module:
The module is connected parallel to the battery terminals. Despite the fact that the module has a very low power consumption, only 10 mA, it is recommended to switch it off during long stops. This module can also be useful in any other technology that uses a battery, such as a scooter, car, etc.
Then the final version will look like according to the scheme:
Source: https://habr.com/ru/post/393159/
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