- #1
electronic engineer
- 145
- 3
I've attached a circuit schematic for the temperaure intensity meter...
R1 is the PTC
the first 555 works as monostable so it triggers second 555 to produce Astable pulses with given frequency depending on the values(R3 and R3 and C4)
anyway i want to ask if i have to supply my second 555 with 5v supplier or not... cause in my circuit I've connect pin 3 of first 555 directly to pin 4 of the second 555 and didn't supply second 555...i've shorted pin 4 with pin 8 ( for the second 555)
want to know your viwpoints, and any suggestion will be appreciated!
thanks in advance!
R1 is the PTC
the first 555 works as monostable so it triggers second 555 to produce Astable pulses with given frequency depending on the values(R3 and R3 and C4)
anyway i want to ask if i have to supply my second 555 with 5v supplier or not... cause in my circuit I've connect pin 3 of first 555 directly to pin 4 of the second 555 and didn't supply second 555...i've shorted pin 4 with pin 8 ( for the second 555)
want to know your viwpoints, and any suggestion will be appreciated!
thanks in advance!