Hi - Very new to this subject so apologies for such a basic question but here goes-
I am currently building a circuit from this website which is a timed relay. Basically its a 555 timer IC used to control the time interval (on time) of a relay.
The circuit diagram aaron publishes indicates 12v which is fine - except that I am trying to install this timer inside a piece of existing equipment which seems to run at just 3v off its own internal transformer.
- so presumably I need to run the new timer off its own little battery - or install a whole power supply for it.
Just to complicate the issue, the existing transformer inside the unit is really poor construction ( made v cheaply in india ) and really I ought to be replacing that as well.
Is there an easy way to install a new power supply that can serve both voltages 12v and 3v ??
Hi - I have read about a lower voltage version of the 555 but if I use that, wont I need to change the values of the capacitors etc to keep the same time interval range?
I think it may be best use a 12v supply and also use this to serve the other 3v electronics by adding some componentry. Any ideas where I can find out how to do this?
Dim question
Posted - Feb 16 2012 : 04:31:32 AM
