Discussion in 'The Projects Forum' started by sai150, Jan 25, 2015.
i need a not gate circuit can anyone help me?
A not gate is also called inverter.
If you are looking for digital electronics topics, the EDUCYPEDIA has some pages for you with links:
Codes & decoders
Counters & registers
Sigma Delta Conversion
Timers & oscillators
A normally closed switch or push button, simple!
Might help if you shared what you need it for. Small detail, like what are you trying to do? You have provided absolutely no information?
actually i'm working on a project
i want a not gate circuit to invert output from a 555 timer
Here is described how a cmos inverter (not gate) is working:
If you just want to invert the output of a 555 timer I would just use a simple transistor as Max suggested. Just about any small switching transistor will work. Here is a simple example:
Note Vout is inverted from Vin.
If you want to use a logic gate, a CD4049 inverter would also work and requires only a single part.
What are you driving with the 555 output? With a typical load drawing less than the rated 555 output current, instead of connecting the load between pin 3 and ground you can connect it between pin3 and the positive supply rail.
As Alec said above, connecting to v+ inverts your signal. See below...
thanks a lot guys