I have a standard monostable 555 in part of circuit I am working on. I would like to power the 555 with 3 D batteries in series (4.5V) but whenever I hook up the battery power supply and trigger the timer the output stays high until the power is disconnected.
The big problem here is that this does not happen when I use my wall adapter power supply (6V 2.5A). Also I have tested certain timers not to do this in isolated monostables on breadboards (NTE955M by NTE and NE555P by TI) but I am almost positive I had one timer do it when it was isolated that way. I think it may be the timer I used (an NE555N by ST) but I have no more to try outside of the large circuit. (CORRECTION: I just found another ST timer and isolated with the D batteries it did not stay on.)
I should also add that this timers output is tied to Flip flop shift registers (sets one and clocks another).
Its something that is kind of bothering me and I will be presenting the larger circuit as part of a senior project so I dont want to be caught off guard by a simple misunderstanding.
Thanks for the input.
The big problem here is that this does not happen when I use my wall adapter power supply (6V 2.5A). Also I have tested certain timers not to do this in isolated monostables on breadboards (NTE955M by NTE and NE555P by TI) but I am almost positive I had one timer do it when it was isolated that way. I think it may be the timer I used (an NE555N by ST) but I have no more to try outside of the large circuit. (CORRECTION: I just found another ST timer and isolated with the D batteries it did not stay on.)
I should also add that this timers output is tied to Flip flop shift registers (sets one and clocks another).
Its something that is kind of bothering me and I will be presenting the larger circuit as part of a senior project so I dont want to be caught off guard by a simple misunderstanding.
Thanks for the input.
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