polarity reversal

I'm working on a project that needs to have a motor's rotation reversal so that it can run clockwise or counterclockwise depending on an independent control from a microcontroller. I'm achieving the reversal by inverting the Vcc and Ground wires. The microcontroller part of the circuit is...

Dear All, I am a student with no background in electronics. I want to make a circuit with a DC power supply that supplies min ± 2kV to max ± 7kV to the circuit. I have a bipolar DC source with a mechanical switch to change the polarity. However, I am looking forward to setting the polarity...

Hello All, I have an SMPS that i want to change its transformer (image below) in the original transformer, pin 7 is connected to ground and pin 9 to a rectifier diode. with another transformer (image below) Now, the primary of both transformers are similar but the secondary of original...

Hi all! First post here, please excuse the lengthy read and thanks in advance for any help you can offer. For background, I'm a hobby-level tech nerd, mostly with audio equipment though... tends to be a bit modular, haven't designed many circuits. Super handy with a soldering iron, quick...

I'm designing a power window switch that will use two SPDT relays to reverse the motor for up/down. I have the whole system wired and and testing properly, but I need to optimize the design for the small space in which it will be installed. Can I daisy chain the 12v+(87) together and the...

Hi All, Do Electrolytic capacitors suffer from permanent damage / performance degradation / rated life degradation - if they are subjected to short ( few seconds) of reverse voltage. Background: I have a PCB that has electrolytic caps on the input and there is no reverse protection on the...