In 1.8, you can right click the daylight sensor to make it a night time sensor. Just put the sensor on the lamp.

you know how to make a basic inverter right? just hook one of those up to a daylight sensor. BOOM. Instant intverted daylight sensor.

Tested a nighttime version in 1.8.1, doesn't work. But it can work with a preexisting clock design,although you might need a daytime and a nighttime sensor (somehow generates current after both are out of respected times so the daytime sensor is used to lock it during the day, or maybe needs a lot more time to update.)
its simply more complicated to build a nighttime version as the transparent block rules don't apply.

The opening of where the light source is coming from can work 5 blocks in x coords and infinite in y coords (if the opening is on top of the sensor) as long as it gets natural light.

I've tested again without a lamp and smashed an opening about 4 blocks away. If I keep smashing and closing a hole near it, It functions exactly like a clock, Therefore, I believe that the redstone lamp in the on position is actually transparent. I've also discovered that the clock would still work if you were to replace the NOT gate with a direct connection to a sticky piston opening and closing a hole in the room. although the piston also has to be enclosed. Although I find the redstone lamp to be more efficient.



I think its safe to say Eureka by now.

you could use a night time sensor?

This must be an exception or a bug then, as I was reading the Minecraft wiki claiming that "Sources of block light (torches, glowstone, etc.) cannot activate a daylight sensor." Although the lamp is the means of producing block light.

Also, It does not seem to work if the NOT gate was removed,

I figured it out for real this time. The problem was that the redstone lamp was powered on, which turned on the daylight sensor, which turned off the torch, which turned off the lamp, which turned off the daylight sensor, which turned on the torch, which turned on the lamp, which turned on the sensor...

Anyways, I figured it out because I created two passageways that led off in different directions.



You need to remember to put the redstone on the top of the lamp to power it - it can go much farther than just 4 blocks.

It does not power the block underneath it. Even if I move the lamp further away from the block with the repeater, it still functions as a daytime clock. However I noticed that the max range the lamp can be placed is 4 blocks. Maybe I should get Sethbling to figure out how this circuit manages to work...

robot_26

53MP3RF1I recreated your setup, and it doesn't appear to happen for me. I tried putting blocks all around the redstone at the top, no dice.

You had to enclose the entire circuit (aka put it in a box). It does not work out in the open or if the circuit is enclosed in glass.

Hm, weird.



It still happens when I have the circuit with multiple repeaters - perhaps the piece of redstone powering the lamp is

I figured out the problem



Try this.

The redstone lamp is powering the block below the daylight sensor, which I assume is then powering the repeaters which sets the clock going. Removing that block below the sensor fixes the problem.

EDIT: the second repeater is not necessary, I just forgot to remove it.

EDIT #2: still a really cool little thing. It'd be interesting to use, especially if you want to do something like have a pulse for one of those large box-style mob farms. It pulses every 2 seconds to release water during the day, and then at night it lets the mobs all fill up again.

53MP3RF1I recreated your setup, and it doesn't appear to happen for me. I tried putting blocks all around the redstone at the top, no dice.

You had to enclose the entire circuit (aka put it in a box). It does not work out in the open or if the circuit is enclosed in glass.

I recreated your setup, and it doesn't appear to happen for me. I tried putting blocks all around the redstone at the top, no dice.



EDIT: I realized you meant an inverted daylight sensor, and now I see that something is wrong. When it is night time, switching the daylight sensor to sense day leaves the light on, while when it is sensing night the light is off. During the day, the light is off for either setting for me.

I think I know whats wrong. See where the redstone connects to the block under the redstone repeater? I believe that is what is causing the flickering. Try moving the lamp down one or the daylight sensor and repeater up one to where it doesn't connect to other parts of the circuit?

See here?:

I think its possible to make it work all around If you would include an inverted daylight sensor block attached to this circuit (in 1.8).

No, It does not lock at all. Try building the same circuit in a completely enclosed room (no glass) with the lamp block on the first layer (all air around lamp).
http://s14.postimg.org/lksa8ft3l/image.png

Does it lock your repeater? If so, that's probably why.

I may have just invented a daytime running clock. I'm not sure how logic works however, could be a bug since lamps are not supposed to activate a daylight sensor.