Usefull Circuits

[dambit]

Hi All,

Just thought I would start this new thread to provide a one stop shop for what I term usefull add-on circuits.

An example would be a circuit that sounds an alarm when the battery has reached a certain voltage, or an auto battery swapping circuit. Anything really that can help reduce the "baby sitting" time when conditioning batteries etc.

So please, feel free to upload your schematics. I would, but I have none.

If there is already a thread for this, just remove this one.

Cheers,

Steve

[rave154]

Pwm with adjustabl frequency & duty cycle, and transistor inverter

[CosmicFarmer]

One idea for the alarm would be several diodes who's breakover voltage is the voltage you wish to be alarmed at, to the base of a transistor, to 555 timer, to piezo speaker. Or how ever else you want to set that up, but using diodes breakover voltage as the if/then.

[wwdotme]

low battery schematic

I found these 2.
I'm working on gather parts for A to test and use it..

Great idea on this thread

[rave154]

circuit builder & sim

just found this circuit builder & Sim etc... looks pretty useful...

Circuit Maker