Hello
I would like to share with you a project that I did some time ago.
In July, I bought an eclectic scooter in Lidl with a seat and a basket.
I thought that it would be useful to do some security and ordered a GPS locator from the Majfrends.
By the way, I thought about a phone charger, the more the phone holder is bought.
This topic inspired me https://www.elektroda.pl/rtvforum/topic3782282.html and I decided to do a security and in this "some kind" on / off switch.
So to the point.
The GPS locator I bought works in the voltage range of 9-90 V, so there is no problem with direct connection to the scooter battery (36 V, charged is about 42 V).
It turned out to be a nice surprise that the voltage value is displayed in the tracking application, which makes it possible to control the state of charge through the application.
The locator has the ability to remotely cut off the fuel (in the car), which I decided to use as an "kind" on / off switch. Here a small problem arose as it is not a simple mechanical but an electronic relay. It works in the voltage range (9-15 V). Using the Step down converter, I get a voltage of 12 V to power this circuit and the car charger. I bought a weak one-amp charger (it's hard to buy a weak one now, but I managed) so as not to drain the scooter battery too much (7.5 Ah). I added the charger for an emergency if the phone fell.
The circuit diagram I used is straightforward, no frills:
First, I had to determine which of the wires gives info from the display-shifters assembly to the controller about turning on the scooter (by holding the M button for a long time).
Traditionally sticking pins and using a gauge. In my case it was a blue wire. And this is the only wire that I had to cut to implement the project, I did all the rest of the connections with the scooter wires using quick couplers.
I will now discuss the connections and how it works.
I set the step down circuit based on the LM2596 with adjustable output voltage to 12 V. Foot 5, the chip (i.e. start / stop pin) was desoldered from the board, it was connected to ground, and connected to the external circuit, which shortened it to ground using a transistor T1. The transistor T1 is switched on with the voltage of 36 V through the resistor R3 in series with the diode D1 (no diode in the attached diagram - sorry). The resistance divider R1, R2 supplies a dozen or so volts to the pin 5, the chip in the off state of the scooter and thus the step down converter does not work. This voltage is supplied from the display-lever assembly when the scooter is turned on. So that part of the blue cut wire that I mentioned earlier, from the side of the display. The voltage of 12 V from the converter is fed to the car charger (from which I removed the LED diode for savings, and so it is hidden in the battery and controller container together with the rest of the system), and to the fuel cut-off circuit in the locator. When we give the command "Cut Off Fuel" from the application, the voltage of 12 V is not applied to the base of the transistor T3 through the resistor R5 and thus the transistor T2 will not be controlled. The signal from the display will not go to the controller and the scooter will not work (it shows error E001). When we give the command "Restore Fuel" from the application, 12 V will come out of the locatoron R5 and T3 will turn on, and it will turn on T2 and the 36V signal will reach the controller when we turn on the scooter, and it will start to spin as needed. In addition, I connected the ACC input in the locator with the 36 V output from the display via the D2 diode (both D1 and D2 diodes are 1N4007), this way I also have information in the application about turning on the scooter.
These few additional elements (T1, 2, 3 R1,2,3,4 =, 5 D1,2) were installed and connected on a small mounting plate. Unfortunately, it is such a "better" spider. I didn't have time to make a decent PCB.
I have hidden everything in the scooter container for the battery and the controller. I re-secured with black silicone. Outside, apart from the phone charging cable, nothing sticks out.
PS Sorry for the chaotically drawn diagram and some mumbling here.
Greetings, if anyone has any questions or comments, I will be very happy to answer and listen.
I would like to share with you a project that I did some time ago.
In July, I bought an eclectic scooter in Lidl with a seat and a basket.
I thought that it would be useful to do some security and ordered a GPS locator from the Majfrends.
By the way, I thought about a phone charger, the more the phone holder is bought.
This topic inspired me https://www.elektroda.pl/rtvforum/topic3782282.html and I decided to do a security and in this "some kind" on / off switch.
So to the point.
The GPS locator I bought works in the voltage range of 9-90 V, so there is no problem with direct connection to the scooter battery (36 V, charged is about 42 V).
It turned out to be a nice surprise that the voltage value is displayed in the tracking application, which makes it possible to control the state of charge through the application.
The locator has the ability to remotely cut off the fuel (in the car), which I decided to use as an "kind" on / off switch. Here a small problem arose as it is not a simple mechanical but an electronic relay. It works in the voltage range (9-15 V). Using the Step down converter, I get a voltage of 12 V to power this circuit and the car charger. I bought a weak one-amp charger (it's hard to buy a weak one now, but I managed) so as not to drain the scooter battery too much (7.5 Ah). I added the charger for an emergency if the phone fell.
The circuit diagram I used is straightforward, no frills:
First, I had to determine which of the wires gives info from the display-shifters assembly to the controller about turning on the scooter (by holding the M button for a long time).
Traditionally sticking pins and using a gauge. In my case it was a blue wire. And this is the only wire that I had to cut to implement the project, I did all the rest of the connections with the scooter wires using quick couplers.
I will now discuss the connections and how it works.
I set the step down circuit based on the LM2596 with adjustable output voltage to 12 V. Foot 5, the chip (i.e. start / stop pin) was desoldered from the board, it was connected to ground, and connected to the external circuit, which shortened it to ground using a transistor T1. The transistor T1 is switched on with the voltage of 36 V through the resistor R3 in series with the diode D1 (no diode in the attached diagram - sorry). The resistance divider R1, R2 supplies a dozen or so volts to the pin 5, the chip in the off state of the scooter and thus the step down converter does not work. This voltage is supplied from the display-lever assembly when the scooter is turned on. So that part of the blue cut wire that I mentioned earlier, from the side of the display. The voltage of 12 V from the converter is fed to the car charger (from which I removed the LED diode for savings, and so it is hidden in the battery and controller container together with the rest of the system), and to the fuel cut-off circuit in the locator. When we give the command "Cut Off Fuel" from the application, the voltage of 12 V is not applied to the base of the transistor T3 through the resistor R5 and thus the transistor T2 will not be controlled. The signal from the display will not go to the controller and the scooter will not work (it shows error E001). When we give the command "Restore Fuel" from the application, 12 V will come out of the locatoron R5 and T3 will turn on, and it will turn on T2 and the 36V signal will reach the controller when we turn on the scooter, and it will start to spin as needed. In addition, I connected the ACC input in the locator with the 36 V output from the display via the D2 diode (both D1 and D2 diodes are 1N4007), this way I also have information in the application about turning on the scooter.
These few additional elements (T1, 2, 3 R1,2,3,4 =, 5 D1,2) were installed and connected on a small mounting plate. Unfortunately, it is such a "better" spider. I didn't have time to make a decent PCB.
I have hidden everything in the scooter container for the battery and the controller. I re-secured with black silicone. Outside, apart from the phone charging cable, nothing sticks out.
PS Sorry for the chaotically drawn diagram and some mumbling here.
Greetings, if anyone has any questions or comments, I will be very happy to answer and listen.
Cool? Ranking DIY
), 24.9 km / h, it will just be slowing down. And if I turn off the application earlier, and someone cuts the chain, it will not go away on the engine, but it can push and ride like on an ordinary scooter. And the locator will inform you about the movement and show where the scooter is located.
