Hello,
I'm trying to design a circuit so that a Sharp proximity sensor will trigger a 555, whose pulse is connected to the clock of a decade counter 4017.
My circuit worked fine when it was a POT/POT configuration on pin 2 and 3 of a LM 311 comparator. When the input (pin 3) went over the reference voltage (pin 2) the output would go low to pin 1 of a 555 astable. When the input went below the reference voltage, output would go high and reset the decade counter.
I realize this must be an odd configuration for a 555, but it worked...that is until I replaced one of the POT's with my sensor. I searched the datasheet for my sensor, a Sharp GP2Y0A02YK0F, but it doesn't have a comprehensive internal schematic. However, apparently there is an oscillation function...maybe this is why it isn't compatible with the 311?
My guess though is that it's the 555 that's causing trouble. Attached is my schematic...good for a chuckle, i'm sure
thanks in advance,
wes
I'm trying to design a circuit so that a Sharp proximity sensor will trigger a 555, whose pulse is connected to the clock of a decade counter 4017.
My circuit worked fine when it was a POT/POT configuration on pin 2 and 3 of a LM 311 comparator. When the input (pin 3) went over the reference voltage (pin 2) the output would go low to pin 1 of a 555 astable. When the input went below the reference voltage, output would go high and reset the decade counter.
I realize this must be an odd configuration for a 555, but it worked...that is until I replaced one of the POT's with my sensor. I searched the datasheet for my sensor, a Sharp GP2Y0A02YK0F, but it doesn't have a comprehensive internal schematic. However, apparently there is an oscillation function...maybe this is why it isn't compatible with the 311?
My guess though is that it's the 555 that's causing trouble. Attached is my schematic...good for a chuckle, i'm sure
thanks in advance,
wes