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Can someone help me correct turn on N-MOSFET transistor (M1)?

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I want control Load using MOSFET with start delay. The delay based on RC with discharge. As a load use Monostable NE555:

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When the transistor is turned on, the circuit based on the NE555 does not work. Probably the problem is that the voltage supplied to the NE555 circuit is too slow.

I connected two circuits into one:

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Second version of the circuit:

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  • \$\begingroup\$ Ain't that a n-mos? you can use the reset pin of NE555 to hold off the load. \$\endgroup\$ Oct 26, 2021 at 21:31
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    \$\begingroup\$ It's not clear what you're trying to do -- if you're connecting the 555 circuit as the "load", then where are you connecting it? If you're using the 555 circuit instead of the MOSFET delay circuitry, then say so. In either case, please edit your question for clarity. \$\endgroup\$
    – TimWescott
    Oct 26, 2021 at 21:35
  • \$\begingroup\$ Right, i use n-mos, not p-mos. My mistake sorry. The NE555 circuit is conected between Drain (M1) and power supply +5.8V. The tac-switch which you can see on the second schematic is removed (bridge). \$\endgroup\$
    – Gregory
    Oct 26, 2021 at 22:08
  • \$\begingroup\$ Might I suggest adding the ‘complete’ circuit to your post? \$\endgroup\$
    – Tyler
    Oct 26, 2021 at 22:39
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    \$\begingroup\$ Disconnecting the Gnd pin of 555 is not a good approach. It is better to use a trigger pin to control/trigger 555. The startup delay circuit with Mosfet seems OK to me. \$\endgroup\$
    – user208862
    Oct 27, 2021 at 6:34

1 Answer 1

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I found proper solution for this problem. I used operational amplifier for control MOSFET.

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