9 Volt batteries, reminder!

[Guest guest]

Do NOT use them without a limiting resistor, they are dangerous, can

burn, etc. 3-6 volts is fine, but 9 is dangerous. Limiting resistors

can be 10k-22k ohms solid resistor. you cut one wire, and splice the

resistor into that wire. Either end in either direction, it will not

matter.

Additionally, if you want better control, use a 100k linear

potentiometer (2.49 at radio shack) connect the center pin and one edge

pin to either wire in either direction, as I spoke about the limit

resistor.

If you use the 100k pot, you should also use the limit resistor!

Otherwise the pot can be set to zero, and will be the same as an

unprotected 9 volt battery...dangerous.

bG