Q:

PIR Sensor + LEDs with no additional Microcontroller

I'm thinking of building a project that would only include PIR sensors and LEDs.
Could I use a PIR sensor like this one, https://www.adafruit.com/products/189, to power 8 LEDs or would those 8 LEDs draw too much power for the onboard circuit of the PIR sensor? How would I wire it?
If this is possible how much voltage would I need to provide the PIR Sensor?
If it's not possible as is, is there any way I could still make this work without having to introduce a microcontroller like an arduino?

A:

I quickly rigged up a circuit which would do the trick. Hope it helps!
As mentioned in the link provided by you, the PIR sensor can work on 5v-12v. For this application, 5v would be sufficient. 
The BC547A BJT transistor acts as a switch here. It acts like a closed switch when suitable voltage is applied to it's base terminal. It acts like an open switch otherwise. 
When the PIR sensor senses an object, it's output would go high. This high output voltage would make the transistor act as closed switch. As a result, all the LEDs are turned on whenever an obstacle comes within the sensing range of PIR. When there is no obstacle, the output of PIR will be low and transistor acts as open switch. Hence, all LEDs will be turned off.

simulate this circuit – Schematic created using CircuitLab

