Transistor driven relay
- Thread starter warpie
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user 37518
Well-known member
Why would you do that?
Bo Deadly
Well-known member
Probably not a good idea. For one, you break the normal behavior of the debouncing RC filter.
user 37518
Well-known member
Are you going to be driving the relay with a signal (i.e. the output of a microcontroller) or with a manual switch? if you are driving it through a microcontroller you have to connect it to the base, if you are going to be driving it with a manual switch then ditch the transistor all together....
warpie
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- Feb 7, 2009
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- 1,587
No reason to switch the gnd. I asked just out of out of curiosity.
Do you think it's an overkill? I will probably use around 10 relays for things like polarity flip, impedance, +48V (this sort of things).
I got convinced that transistor driven relay is the way to go but only if it's necessary
No microcontroller. Just manual SPST switches.user 37518 said:
Do you think it's an overkill? I will probably use around 10 relays for things like polarity flip, impedance, +48V (this sort of things).
I got convinced that transistor driven relay is the way to go but only if it's necessary
user 37518
Well-known member
warpie said:No reason to switch the gnd. I asked just out of out of curiosity.
No microcontroller. Just manual SPST switches.
Do you think it's an overkill? I will probably use around 10 relays for things like polarity flip, impedance, +48V (this sort of things).
I got convinced that transistor driven relay is the way to go but only if it's necessary
Why do you need a transistor when a switch will do a better job?, transistors are useful when your controlling signal cannot provide enough current to activate the relay. Otherwise just use a switch.
