None of the circuits will use much current.Hello and thank you again!
Those Versa-Timers I cannot seem to find a price for one. 2" square seems a bit large?
inwo, would you have any idea on the reset time for those darlington circuits? Thank you! Reset time is controlled LS1 (pilot lite) or resistor.
Start with 5k if you don't want an led or lamp indicator.
Yes, 3 and possibly 5 coils at 16.7mA each. At such a low current, a 2n2222 should work alone.
iimagine, I like the prospect of very low power consumption for the circuit to activate. What kind of FET's or device is that do you propose I look for? Quick reset time? Thank you!
Alec_t, Very well displayed! I like the low part count and release time on that, it appears less than half a second.
I am enjoying all these proposals! Keep it fun for yourselves also, no losing sleep or family time here! Simple, functional and some versatility is my thoughts
It prevents the gate voltage rating from being exceeded.Alec_t , what is purpose of D3?
Yes. Each relay should have a free-wheel diode across it.Do you have to protect fet drive? From high voltage or spike?
Get one! Very useful. LTspice is a free downlaod from Linear Technology, and the Yahoo LTS User Group has libraries of sim models for free download.I don't have a simulator
I am assuming that about any FET with similar characteristics can be subbed into place for the 7805? I don't remember my last SMD soldering skill coming out too super... I also appreciate the small capacitor in this design, thanks again!How about this mod of the circuit in the other thread:-
Using this device here (TO-92 version)Yes. Not critical. Or you could use an NPN plus base resistor.
The FET you linked to doesn't have similar characteristics. Its Rds_on resistance is on the high side at ~10 Ohms. However, if the total current draw for the bank of relays is no more than, say, 100mA you should be ok. The FET dissipation would then be ~100mW.I am assuming that about any FET with similar characteristics can be subbed into place for the 7805?
|Thread starter||Similar threads||Forum||Replies||Date|
|Need help with creating a wire jumper||General Electronics Chat||11|
|G||Need help, creating training aid for my army unit||General Electronics Chat||7|
|N||Need Help Creating A Circuit for and Kinetic sculpture||General Electronics Chat||6|
|M||need a help for creating unity feedback for PMOS two stage amplifier||Analog & Mixed-Signal Design||1|
|M||NEED HELP creating a 4-bit ADDER/SUBTRACTOR in Logisim||Digital Design||1|
by Jake Hertz