sorry
i am getting 1.24volts
then use 2 diodes , so the transitor can only switch if mor the 2 volts are on IC555 output.
Pese
THAT say:
if you have less than 2 volts on IC output (in front of resistor
the transistor will NOT conduct.
If 2 volts (and mor arrived , the transistor will go to switch on.
Even if you preferre to switch the Transitor an faster way (shorter on / off times)
use the DARLINGTON circuit !
(Exist in one Transitor - If you hane not . Take an
2N2219 2N3053 BC140 BC327 or like this in Front of the
Power -Transistor (2)
Collector (1) conduct to Collector (2)
or better to + Volts (Supply)
The Emitter(1) connect with BASIS from (2).
& Use an discharge resistor from this POINT to ground 470 up to 1000 ohms
Drive now Basis (1) with the IC555 via 1kohm to 3kohm resitor AND 1N4148 Diode.
so it will work.
Pese
MODIFY:
I seen now in 555 Datasheets.
V (sink is about 0,7 volt @ 10 mA (output , but over 2 volts if requested 100mA and more.
(that higher currents you need if only one Power trasistor must amplify the load.!)
In any way you use less the 10mA (from IC) If yiu prffere to use the Darlington Cofiguration.
because the total amplifying factor is than over 1000 !!
++
