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So if you are using an ohm meter then the 'short' could be due to:1 - a soldering short between the two (but you think thats not the case)2 - Because you are measuring with the chip/capacitors/voltage regs etc in place then these components will become 'active' when you apply your meter and will effect the resistance reading. I know its too late but you are best soldering all sockets/headers/links before components as then you can you find any true shortages before introducing components (see http://www.societyofrobots.com/member_tutorials/node/190)The only part you can probably remove is the chip. Try it and see if you still have a short. 3 - If the short is in the supply lines +ve/gnd then these come either: directly from the battery, or from the voltage regulator. If its from the 'voltage regulator' and there is a short then the regulator will get hot very quickly. If they come from the battery, and your meter can do amps, then how much current is coming from the battery?
Have you tried this:-On my diagram the two ground supplies are connected (underneath the processor chip).So for a single 6v power supply - just attach it to the header that says (Attach 4xAA battery pack here) and then use one wire to connect the +ve pin from that header to the +ve pin of the header that says 'Attach 9V PP3 battery here'. ie using the diagram co-ords just connect H5 to C5
thanks webbot! but why is everyone using 2 battery packs? is it because of noise?
yea lol, i was thinking why doesnt everyone just use one pack and install a big 550uf or something cap?