circuit observation

t_n_k

Joined Mar 6, 2009
5,455
It looks like a partly completed or damaged [missing components] astable multi-vibrator configuration of the 555 timer. Output pin 3 seems to be driving the base [via a resistor] of a transistor for an unknown purpose. The transistor collector connection is not made to anything external.

IC power pin 8 connection seems to be missing on the underside of the board.

Basically it's a mess.
 

Thread Starter

beingsallu

Joined Jul 10, 2012
18
It looks like a partly completed or damaged [missing components] astable multi-vibrator configuration of the 555 timer. Output pin 3 seems to be driving the base [via a resistor] of a transistor for an unknown purpose. The transistor collector connection is not made to anything external.

IC power pin 8 connection seems to be missing on the underside of the board.

Basically it's a mess.
yup it's a big mess.
 
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