Interesting Circuits: Designs & Applications

Hello!
I wanted to introduce you to my website, which features interesting circuits and tutorials.

www.dreiergolf.net

'Follow-me-home' function, remote closing of windows via radio frequency, radio remote control not connected to the ignition, but to the central locking system.

Form your own opinions, and I welcome any criticism!

hi,
If someone owns a radio that doesn't have a remote, they should consider getting a new one.

The circuit for dimming the W8 light is very concerning.
When dimming, the MOSFET traverses its characteristic curve field.
'This means that a certain amount of power is dissipated in the FET, based on the voltage and current, which can lead to excessive heating. I wouldn't risk it and would use PWM instead.'
greetings

Morning!

Nice page.
The MOSFET dimming function is fine as long as the load is in the single-digit watt range and is not being dimmed on and off constantly. I have a similar circuit, but using a transistor, and I have already tested it.
At this point, I might also be able to 'promote' my page .
www.jalt.de
(with still a relatively small number of projects...)

Best regards,

hi,
That should be fine.
But I wouldn't do it that way.
I used an Atmel microcontroller and implemented it using PWM.
Of course, it includes all the standard features, such as dimming the lights when the central locking system is activated with the remote control, turning on the ignition, etc., and brightening the lights when the central locking system is activated with the remote control, turning off the ignition, etc.
greetings

Thank you for your suggestions!

'In my case, the PWM isn't getting hot enough to be dangerous, so I'm just leaving it in. If it burns out (and hopefully the car won't catch fire), I'll let you know, but so far (about a month), it's working perfectly.'

The remote control feature is mainly intended for people who go to events held in fields or on beaches. With the remote control function, it's possible to keep the radio playing even after the ignition key has been removed.

hi,
I used a bistable, two-coil relay and connected it to the car's central locking system to switch it on remotely or via the ACC (accessory) function.
Now, the radio turns on as soon as I press the button on the remote control.
so, that music is already sounding nice, when you're getting in .
greetings

Sounds interesting. When eliminating options, turn on the radio.
Is there another way to prevent the radio from briefly turning off during the ignition process?
I think my battery should be able to handle it.

But is there another way to prevent the radio from briefly turning off during the starting process?
Well...
'You can certainly find a small power-off delay of 5-10 seconds in any electronics store, or easily create one yourself with a little thought... Simply connect it between the ignition switch and the radio, and you're done.'
2) A diode that directs current from ignition switch position 3 (starting) to ignition switch position 1 (S terminal).


I think my battery should be able to handle it.
I'm not so sure about that! The voltage drop can be quite significant, and some amplifiers don't handle it well at all. In the worst case, they can completely lose control and cause the speakers to be damaged.

Regards,
Private.

EDIT: You even have a shutdown delay circuit using an NE555 on your website...

sounds interesting, when excluding => turn on the radio.
Is there another way to prevent the radio from briefly turning off during the ignition process?
I think my battery should be able to handle it.

hello,
It depends on the radio and the car.
If you have a newer car, the 'S' contact for the radio will remain connected even when the engine is started.
The problem is often with the radios themselves, which switch off when there's a significant voltage drop, such as when starting the engine.

But with the bistable relay, the S contact isn't used anyway.

I own a Lupo 3L with a start-stop system, which already has a voltage stabilizer installed from the factory. This stabilizer ensures that the voltage for the control units, dashboard, and radio remains at a minimum of 12V.
greetings