One shot circuit - missing values...

[gildasd]

I am breadboarding this circuit, but I have not idea what values I have to use for the resistors...

The two  transistors are BC547... And I've only got 2 left... Noob, I know.

I have 100, 220, 470, 1k, 4.7k, 10k, 22k 100k and 1MOhm resistors...

[Zero999]

The values depend on the time delay and desired current through the LEDs.

There's a good article about how it works and what component values to use on Wikipedia.
http://en.wikipedia.org/wiki/Multivibrator

As it's being powered off 12V, one of the transistors needs to have a diode connected in series with its base or emitter, to protect it from the negative voltage when the capacitor discharges, as a typical base-emitter junction is rated for no more than -5V.

[gildasd]

I have 2 leds that act as diodes. They are standard green fare... 2V drop.

As a side note, me UNI-T UT61B drives the led sufficiently to get them to light up 

[Zero999]

Then if you don't have access to a datasheet for the LEDs, aim for a forward current of between 10mA and 20mA.

[gildasd]

Yeah that's correct. I limit the supply to 30mA anyhow...

The delay is not important, just that the leds switch from one side to the other.

[Zero999]

The calculations are fairly straightforward. How about suggesting some values, adding them to the schematic and posting it here? Then we can check.

If you don't need a time delay then why not use a simpler circuit without any timing resistors of capacitors? Configure the transistors as a simple logic inverter.

[gildasd]

Because we (in electronics lab class) wanted a delay in LED1 caused by the discharge of C1... Just to visualise the cap discharging.

Anyhow, did not calculate, but started with high values going down until the darn thing worked:
R1; 470
R2; 470
R4; 4.7K
R5; 10K

No more BC547 were damaged 

Is there a rule to making breadboarding faster? Do you start from one end, the middle?