Hi there, I'm trying to build a soft-starter circuit with 2N2222 transistor. But I'm struggling to get a fix on the R1, R2 and C1 values. Now the relay engages as soon as the power up (I see no delay). I'm trying to come up with 300~500milliseconds delay from power-up to relay engaging. [image…

For 5 V, an IRLZ44. Transistor (BJT) circuit will not work.

Drive 5v relay with 2N2222

LarryD September 26, 2021, 6:43pm 13

Did you try adding a base resistor ?

Do you have a 555 timer ?

When does the 5v appear ?

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