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Confused about back EMF protection in maglock circuit

This is residual magnetism. To test put tape on one corner maglock armature. If that fixes it replace maglock if no change you have a failing relay. Dtk-ess is best to protect from kickback ...
Jon's user avatar
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How to protect N-type mosfets in parallel againt back EMF of a transformer

You cannot reliably drive those MOSFETs with only 5V. I suggest adding a pair of gate drivers to start with, using a 10-15V supply. An NPN-PNP emitter follower BJT pair (eg. 2N4401/2N4403) on each ...
Spehro Pefhany's user avatar
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How to protect N-type mosfets in parallel againt back EMF of a transformer

Not surprised at all. This circuit was obviously never tested by the author. This is a terrible circuit. Your first-order problem is MOSFET cross-conduction (aka "shoot-through). This means both ...
MOSFET's user avatar
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555 Timer for Motor Direction Control

It's really a bit surprising to use two 555 for a job that is totally not what a 555 is for. Use a single motor driver / H-bridge. Your 555 are not meant to drive inductive loads, nor are they even ...
Marcus Müller's user avatar
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555 Timer for Motor Direction Control

Simplest improvement would be this. It doesn't modify your existing design. simulate this circuit – Schematic created using CircuitLab However, it would be best to get a proper motor driver. It'...
MOSFET's user avatar
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555 Timer for Motor Direction Control

Take a look to bidirectional DC motor control recommended in bridge drivers (like L298) datasheet, you will see 2 diodes in each output to limit the negative voltage to ground and positive to supply. ...
Bravale's user avatar
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