Helped by comments from posters to this newsgroup, I have made three Jaycar flexitimers to switch on InfraRed remote controls to cause Canon G2 cameras to take one exposure every ten seconds. . They are made by butchering cheap I.R. remote controllers from Hong Kong (ebay) and having the flexitimer relay close the appropriate switch. They work well. They are also a bit of overkill. 12Volts to activate a solenoid to switch a milliamp or two at three volts maximum. There must be a simpler way. A long time ago I built, from a circuit in E.A. (I think) a timer to switch on and off an EPROM eraser. It had a 555 and a few other bits and the timed intervals were adjustable. There must be a similar circuit somewhere to do exactly what I want, which is to close a circuit so that the I.R. is activated, (always for one second) and then turned off for ten seconds. I believe it would not need a relay because the device being switched has such low current.In other words, I believe the switching transistor would be able to handle that sort of current and voltage. The ability to alter the off time from, say, six seconds to twenty seconds would be an added bonus. Can anyone point me in the right direction?
- posted
15 years ago