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Eric's setup powers both the LM358 and the LM3914 with a constant voltage that I will be providing with an LM317 to deal with the fluctuating (10.8-13.8V) supplied by the motorcycle. What about altering the frequency?
The part is a TI part from radio shack, the TL082 Dual BiFET OP Amp. The little diagram on the back is identical to the one below for the LM358. I am going to have to make a digikey order anyways, though. So, eventually I will get an LM358. But, for now, I hope the TL082 will work. It's funny, but when you go the the RS site, and look at the TL082, it shows a pic on a National Sem. part instead of the TI part.
HERE is a link to the datasheet.
**broken link removed**
So you want the empty light to flash?
Here's a circuit which oscillates at about 2Hz and can be built with half an LM358.
Connect the LED between the op-amp's output and pin 1 of the LM3914.
View attachment 42587
Or do you want to add another LED which flashes when the LED connected to pin 1 turns off?
That can be done as well.
EDIT:
Here's the schematic.
hi,Do the capacitors sound like they are correct? When I looked up the datasheet, it showed 2 being used also, but one went from Vin to ground and the other went from Vout to ground. As I stated previously, I have both going from Vin to ground (pin1 to pin2).