"I believe you can now buy those with built in feedback ability."

You can, but for the price of 1 you can build 4.

@Rob-bot, pretty neat ldea, simplistic but looks very effective! A great idea.

It has given me an idea of using this, I assume 100mm ( 4 ) is the largest linear slider pot you can get? I’m based in the UK and can only find up to 100mm.

Also where did you get the linear actuator for $30?

"@Rob-bot, pretty neat ldea, simplistic but looks very effective! A great idea."

Thanx

"It has given me an idea of using this, I assume 100mm ( 4 ) is the largest linear slider pot you can get? I’m based in the UK and can only find up to 100mm."

I think 100mm is the largest I’ve seen and I've also seen them in 75mm, and 50mm, so, you can use them for 3" and 2" actuators too.

"Also where did you get the linear actuator for $30?"

I get them on ebay.

@Rob-bot,

Did you managed to get the solution i.e. (Servo/PCB + H-Bridge + DC Motor + Potentiometer) and get it working ?

I replicate the solution using a car windshield 12v Bosch Motor (Toymaker post) and all the other stuff.

if you need I can make a video.

Hey folks,

I'm trying to connect a L12 option R linear servo by Actutronix to an L293D h-bridge chip to drive the actuator back and forth, but I'm having trouble deciding how to set it up.

The linear servo only has 3 wires unlike a DC motor with only 2 or stepper with 4. So I was curious if anybody had any ideas on how to configure the actuator. I have attached data sheets for both mentioned parts.

Thank you!

hbridge.pdf

ActuonixL12Datasheet.pdf

WIRING: (see last page for pin numbering) 1 - White - RC input signal (RC-servo compatible) 2 - Red - Power (+6 VDC) 3 - Black - Ground

@Handy Dandy,

If you have the option R, Dave's post is correct.

Quote:

The -R actuators or linear servos’ are a direct replacement for regular radio controlled hobby servos. The desired actuator position is input to the actuator on lead 1 as a positive 5 Volt pulse width signal. A 1.0 ms pulse commands the controller to fully retract the actuator, and a 2.0 ms pulse signals it to fully extend. If the motion of the actuator, or of other servos in your system, seems erratic, place a 1-4O resistor in series with the actuator’s red V+ lead wire.

basically what you have is a Linear Servo.

You can't use a H-Bridge, you will need a micro-controller to pulse a PWM signal between 1000us (Retracted) and 2000us (extended).

"Did you managed to get the solution i.e. (Servo/PCB + H-Bridge + DC Motor + Potentiometer) and get it working ?

I replicate the solution using a car windshield 12v Bosch Motor (Toymaker post) and all the other stuff.

if you need I can make a video. "

ptp,

that would be great if you can post a demo video. Please let me know if you do as I have not had the chance to try the components out yet and would rather start off connecting them properly.