In SX Microcontrollers, SX/B Compiler and SX-Key Tool, robotworkshop wrote:

Hello,

From your posts it still isn't quite clear how you are powering the SX28 chip.  It appears that you are trying to use the 22K resistor to drop the 12v down to 5v.  Is that what I am seeing in the picture??  If so I would expect it not to work so it is doing what it should.

You should have a clean 5V supply for the SX28 chip.  That is already present on the programming board for the SX28.  When you put the SX28 on the protoboard can you temporarily take the ground and 5V connections from your programming board and connect those to your breadboard.  If that makes the difference then the power supply is the first problem.  If it works then get at least a 7805 voltage regulator and a couple filtering caps.

If Radio Shack doesn't have those on hand then look for some electronics gadgets headed out to the trash.  You'd be surprised to see just how many will have a 7805 regulator that you can pull out for free.

It's often difficult to get started but once you successfully get through a few projects it does get easier.  There are a lot of people on this forum of all levels of experience and they are very helpful.

Are you going to run everything off of a single battery or is it a 12v wall supply?  Please post how what you are using to power your circuit and what voltages you want it to supply.  Since you mention motors it is also useful to determine the current requirements of those.  If you are powering the motors through a smaller regulator that could cause you problems down the road.

Good luck,

Robert

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