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Electronics / Simple line follower robot!
« Last post by Adler on December 18, 2017, 07:58:21 AM »
Hi guys,...
today Iwanna upload a simple line follower robot proteus file!
It works very well!
suggest build it!
I dont upload my cods you have to write your own codes so you can enjoy own ability!
Electronics / Help Setting Current on DRV8825
« Last post by imseakin on December 16, 2017, 01:55:25 PM »
I'm trying to set the Current limit on a DRV8825. I put the negative of my multimeter on the GND pin (top right when pot is in lower left orientation) and then put the positive probe on the VREF point. I see the full voltage of the attached battery.

But when I put the positive probe on the center of the potentiometer, I get 0 (zero) volts and turning the pot does nothing.

Please help. I've tried this on four drv8825 boards and all of them show 0 volts regardless of how I turn the pot.

Thanks for your help.

Mechanics and Construction / Robot arm torque - reg
« Last post by Robo shankar on December 07, 2017, 05:48:31 AM »

I have found the online robot arm calculator from your website. The link is mentioned below


In this calculator, torque of M0 motor is less than the torque of M1 motor When i am giving same acceleration for the both motors. But all the arm weights & motor weights is acting on the M0 motor. So I think that the torque for M0 motor should be higher than the M1 motor. But it is not like that in calculator.

Is there any principle behind this ? or any formula to find out the torque of the M0 motor ?
Misc / New PWM Meter & Low Voltage Cutoff Switch
« Last post by ServoCity on November 30, 2017, 03:54:54 PM »
PWM Meter - $19.99
Need to know what PWM signal your receiver, robot or servo controller is sending? Simply plug in our PWM Meter to see a readout of the PWM signal in microseconds (?sec). If you wish to pass that signal on to your servo or device, just plug into the other set of header row pins.

Low Voltage Cutoff Switch - $19.99
It's important to protect your LiPo batteries from being drained below 3V/cell and our Low Voltage Cutoff Switch does just that. This switch has 3 modes; 1S, 2S or 3S and it simply passes the voltage on from the battery to the load (motor controller, ESC, servo controller, light, etc.) until the battery meets the cutoff voltage.

Whether you are powering a microcomputer like a Raspberry Pi, a microcontroller like an Arduino or an RC vehicle, our Low Voltage Cutoff Switch takes away one of the main challenges of working with LiPo batteries.
For Sale / [advertisement] For sale: Laifual harmonic drive for robots
« Last post by Kaylee Wang on November 28, 2017, 07:54:51 PM »
I am Kaylee from China, we produce Laifual harmonic drive for robots.
Our company website:

If you are interested in our products, plz contact with me freely.
Email: [email protected]
Whatsapp: +8615988271970

Misc / Cyber Monday Deals Now Active ! - ServoCity
« Last post by ServoCity on November 27, 2017, 09:12:45 AM »
Don't Miss out on our BIG Cyber Monday Deals - Today only !

Click on the link below to view Cyber Monday Sale
Mechanics and Construction / Robotic Hand
« Last post by icecapsule on November 23, 2017, 06:34:44 AM »
Hi, I'm planning on making a robotic hand for an art exhibition. From looking online, it seems this tutorial is laid out pretty well and should be suitable for my project;
However, I want the movement of the robot to be from code rather than from the glove, is this possible? The type of movement I want is pretty basic (I think!) it's just small random twitches and glitches, nothing specific. Thanks, Claire
Software / Re: Android robot control app
« Last post by Genius At Play on November 22, 2017, 03:25:19 PM »
Thanks brilliant, looks amazing. :D
Misc / CYBER MONDAY DEALS - NOV 27th at ServoCity
« Last post by ServoCity on November 22, 2017, 11:57:46 AM »
FREE Shipping on orders over $100.00, and your order could be selected to WIN a ServoCity gift certificate !!

follow the link below to check out deals !

For Sale / Programmable robotic arm for arduino starter learning
« Last post by Lewansoul on November 22, 2017, 04:33:43 AM »
Hi this is Una from China,The robotic arm product link is:
If you want to buy it or want to become our dealer please contact me
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