++ ATOT official NEF thread part IV ++

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alfa147x

Lifer
Jul 14, 2005
29,307
106
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42, Hitchhiker's Guide.

If I wanted to figure that out, assuming this is a standard round home doorknob, I'd bind the knob with tape, and try hanging various weights off the end of it. Once it moves, you'd need to convert that weight into a measure of torque, then pick a motor with more torque than that. The motor needs to have a stop on it, so probably a stepper motor would be needed, and I'm assuming that since you want a motor for a doorknob, you're talking some form of remote access, meaning you need a microcontroller with either timing ability (pieze crystal), or with an Ethernet shield for network control.

Arduino + RFID reader + stepper motor

I just need it to turn the deadbolt. I'll have to take one apart too see how i'm going to connect a motor to it
 

zzuupp

Lifer
Jul 6, 2008
14,866
2,319
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Arduino + RFID reader + stepper motor

I just need it to turn the deadbolt. I'll have to take one apart too see how i'm going to connect a motor to it

solenoid, instead of motor?
 

alfa147x

Lifer
Jul 14, 2005
29,307
106
106
How much should i charge for setting up a wireless network + setting a print server? 2 hours max

My boss's boss has requested that I help a friend of her's out. I have no idea how much to charge...
 

Barfo

Lifer
Jan 4, 2005
27,539
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