Electrical Signal Routing with Mechanical Relays Part 2
Ғылым және технология
In this two part series we take a look at mechanical relays: different types, terminology, theory of operation, and design considerations. In part 2 we look at a simple circuit that allows us to control armature or reed relays with a simple digital pin from a microcontroller. We also look at a circuit design that allows us to avoid hot switching when using mechanical relays.
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Пікірлер: 2
Very interesting topic. Why do we need a mechanical relay if the P-channel MOSFET is already carrying our signal?
@ForceTronics
Жыл бұрын
Great question. I try to use solid state switches whenever I can and avoid using mechanical relays because of cost, design space, and reliability. But there are applications and industries where an "air gap" is required when switching or isolating electrical signals. For instance automotive and aerospace defense industries often require mechanical relays over solid state switches for safety purposes. When you have use solid state switches there is often some level of leakage currents and a higher probability of the switch getting unintentionally actuated.