So I am building the following circuit:
Thanks to: http://www.bowdenshobbycircuits.info/555.htm for this schematic.
The circuit is running off of 4.5V, and is working fine in terms of blinking. The only issue I am having is that the top strand, (3pin goes high connected to 2N3053) is much dimmer than the bottom strand (3pin goes low, connected to 2N905). I am using a 1M pot for R2 ( to adjust flash rate) and everything else according to the schematic.
I played with the value of the 220Ohm resistor before 2N3053 transistor (even hooked up a pot to see what the different resistance values gave) and I ended up having it either really dim or not flashing. (the closer i got to it being brighter, the closer i got to the two strands not really alternating.)
I am new to these types of circuits and think it has something to do with a reduced voltage off the 3pin going high. Can someone help troubleshoot this for me?
thanks!
Thanks to: http://www.bowdenshobbycircuits.info/555.htm for this schematic.
The circuit is running off of 4.5V, and is working fine in terms of blinking. The only issue I am having is that the top strand, (3pin goes high connected to 2N3053) is much dimmer than the bottom strand (3pin goes low, connected to 2N905). I am using a 1M pot for R2 ( to adjust flash rate) and everything else according to the schematic.
I played with the value of the 220Ohm resistor before 2N3053 transistor (even hooked up a pot to see what the different resistance values gave) and I ended up having it either really dim or not flashing. (the closer i got to it being brighter, the closer i got to the two strands not really alternating.)
I am new to these types of circuits and think it has something to do with a reduced voltage off the 3pin going high. Can someone help troubleshoot this for me?
thanks!