Recent Posts

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Robot Videos / ROVER - we are developing a cool wheeled robot.
« Last post by GEC_Engineering on June 12, 2023, 01:43:38 PM »
Hello everyone, I am sharing with you our project, maybe someone can help us with the implementation of our idea.

We are a small team of engineers from Moldova, we want to help solve a criminal problem with constant shootings in schools, shopping centers and other buildings.

Here is our project 
and what we have achieved so far

on YouTube we constantly upload videos with our developments - perhaps someone will want to cooperate with us and develop their projects.

Our web site
Anyone else intersted in helping. I got the manual bits out of the way. Please see attached picture.

Picture Full Size:

Next step is to program an alarm clock.

Alarm clock features:

- Set time
- Set alarm
- Set number of chimes.

Im not sure where to begin on this. Any help much appreciated. Thank you
Thanks Larry, I went ahead and sent you an email.  8)
Electronics / Question About Pairing a Remote
« Last post by incredibrent on May 22, 2023, 11:31:15 PM »
I am a total beginner and I need to pair a remote with a little circuit board thingy, but I don't even know what kind of remote or circuit board I have! (I have attached a picture)

If someone is able to help me identify these two items that would be a good place to start.

Also, any advice on pairing a remote would also be helpful.

(Note: the circuit board already works and does what I want it to do and one of the remotes works with it, I am simply trying to pair a second remote that is identical)

I am interested in helping you.  You can email me at [email protected]
Electronics / Project help request: Striking a bell manually, alarm clock.
« Last post by stevef22 on May 16, 2023, 04:44:46 PM »
Project help request: Striking a bell manually, alarm clock.

Hello! Glad to be here at this forum. My name is Steve. I'm looking for help designing a circuit for an alarm clock bell. The bell is a "singing bowl" struck with a leather mallet. 
Variables user can set:

Initial Clock time
Clock Time Zone
Chimes: 1-10
Duration between chimes: .100ms - 5 seconds
Intensity of strike: (not sure how to rate this, ie harder or softer)

Design goal is for a physical mallet to strike the singing bowl via actuated 12v motor. (I can get fancy and design a little wooden figure to strike bowl later)

I'm thinking the clock settings can be built into wooden base via a small analog LCD screen. Or everything configured via super basic app with the above variables listed above, connected via bluetooth. 
My idea isnt novel. This gentleman created a similar invention. Link here:

If interested in helping me please let me know! My skills are soldering, wood working and finishing.  Looking forward to your reply!

Simple image diagram of my project:


Thank you, Steve
Robot Videos / Arctos - 3D printed robotic arm
« Last post by Arctos on March 30, 2023, 01:48:03 PM »
Hi folks,
I designed and built this robotic arm. What do you think?
If someone want to build it here is the link with all info:

I'd recommend putting them all on a rotating bar, driven by a single worm gear motor, and low to the ground so wind won't bother it. Use a timer to rotate 1 degree every 3 minutes or so (or whatever, timed with the sun in your area/season). You'll need a microcontroller (with accurate clock), a motor driver, and an MPPT.

I use solar panels for everything, but keep them fixed in place. Didn't want to deal with all the added complexity for only 20% more power. My understanding is the latest panels you can buy can handle the sun at an angle to the panels much better than the older ones out there.
I need help to design and build a solar tracker mechanism so that my solar panels can track the sun. The panels are coupled to a rack that is lying flat on my car port. There are 6 panels and they are arranged in 3 groups rack of two panels each. The 3 groups should be connected so that they can move at the same angle. I want the tracker to work with two linear actuators on opposite ends of the car port. At sunrise, the linear actuator farther from the sun?s direction tilts up the panels from its end so they can face the sun while the second actuator doesn?t work but acts as a stationary pivot. The tracker electronics actuates the actuator every 15 minutes (time duration should be configurable) to move the panels towards the sun based on input from the light sensors. By midday, when the sun is exactly overhead, the first actuator allows the panels to rest flat on the roof of the car port, then stops working. As the sun moves overhead towards the west, the second actuator takes over the work of tilting the panels while the first actuator only works as a stationary pivot. The tracker electronic control continues to work with the photo sensors at preset time interval to make the panels face the sun using the actuator to tilt it. At sunset, the second actuator rolls itself back to the original position where the panels lie flat on the car port. The whole process is repeated the following day. I need help on the right mechanical mechanism to connect all the components togethers as well as the electronic circuitry that controls everything. I have attached a crude sketch of how the panel stands on the carport.
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