Let's Make Robots!

USB ASP programmer not working with Arduino Micro

Hello everybody!

I'm currently working on a project using an Arduino Micro. Unfortunately, due to a soldering mishap, the micro USB port is not usable. Now, I'm trying to program the Arduino with its ICSP header using a USB ASP programmer. Whenever I try programming the Micro, I get this error message.

Calculates simple mathematical equations.
Hello fellow LMR users! First off, I want to make this post a building log for this project. However, I started the project a few months ago, so it's already more … Read more

Custom PCB Manufacturing

Hello everybody!

Would anyone know were I could get made a custom PCB with two copper layers and a silkscreen layer? I have been searching for two weeks now, but all the manufacturers are either too expensive or don't accept my file format (PDF).

Any help would be greatly appreciated!


Circuit Help

Hello everybody!

I've been browsing the Web for projects using the 555 timer, and found one that interested me: a stun gun. I've been constantly working on the circuit (schematic can be found here). However, getting it work has been impossible for me. For example, according to the description, the transformer alone can produce 1kV, but my multimeter only detects 9VDC, the same as my 9V battery power supply. I even bought a second transformer, just to see if the first one was defective, but still no success.