HI azmax100. I think I saw that robot before in some other forum. What does it do actually? The skull looks a bit out of place.

Here is a close-up of what I am working on.


Here's few sneak peek of the electronics which I am currently working on:


The 2nd picture maybe familiar to some RC fan.

Rokiroad: nope, this is unlike Lego Mindstorm because there isn't any bricks !!

Enferno: PIC is basically a category of IC, called microcontroller (a.k.a uC). PIC generally refers to microchip uC. Another popular controller is Atmel. For programming, the 2 most popular language is assembly language and C. Various compiler used different C syntax, but they are actually quite similar. For free compiler, you can try MPLAB, official software from Microchip, comes with assembly language and C. You will need a programmer as well to download the code into the uC. You can get a lot of project video in youtube.

P.S.: I hope this thread would not be hijack by advertisment and announcement like the other robotic threads. Hope TS could monitor this regularly. Cheers!

If you are using identical component, considering the components is functional, there are 2 possibilities:
1. Wrong wiring connection
2. Wrong supply

Try and post a picture of your prototype. By the way, most H-bridge use 4 common transistors. Using 2 PNP and 2 NPN is confusing, you need to connect to supply and ground.

Your circuit looks correct, seems like you duplicate the circuit up to jumper cable color. Anyway, did you connect your resistors to supply/ground as indicated in that website?

How about trying using LED or bulb? Easiest way to test if there is current passing or not, and also good way to test the polarity. If using LED, remember to use at least 2 LED in series. If not you may oversupply the LED as typical LED is rated at 2~3v.

Used to have NXT Mindstorm, but I sold it off it already cause hardly play with it.

spacelion: it's ok if the used resistor is not grounded, as long as there is no passing current, the transistor would not be activated. But just in case there is a leak, better connect the resistor to either ground or supply as indicated in the link.

p.s.: I have experience where breadboard do leak current, maybe that's the problem.

Nice observation Some remote control stuff that is! Some gigantic robot to take over the world... (I wish ) Anyway, haven't got much progress since my last post, busy with work. Hope to get a few days break, can focus on it.