To Whom it May Concern... searching the internet for help and ran across your website... lots and lots of useful and helpful information... THANKS for making it available, however I have a "problem" and cannot locate a positive answer from your information and thought maybe you could point me in the right direction.
LIONEL... I have installed some alternating flashing LED Ditch Lights... they work GREAT with locomotive sitting still, regardless of track voltage.
Here is what I have done... from the track I pickup the AC voltage, rectify with a bridge, send the DC voltage to a 7805 regulator... the output of the 7805 DC- is sent to a purchased flasher board. The 7805 has .1 uf ceramic capacitors on input and output leads to ground... the DC+ output of the 7805 has 68 ohm resistor connected LED cathode... the flasher board is connected to the other side of the LED... the flashing is via DC- being switched.
EVERYTHING WORKS GREAT when locomotive is sitting still, regardless of the track voltage, BUT when the locomotive starts to move these LEDs operation become erratic, regardless of track voltage. I ALSO installed a 10 uf electrolytic across the LED connection, after problems cropped up, which helped, but still erratic.
Suspect back EMF from the dual motors???
I would appreciate you pointing me to one of your articles or somewhere else that may have a simple answer.
Exciting circuit... looks great... just erratic is all.
THANK YOU so much for any reference materials or assistance, Jay
LIONEL... I have installed some alternating flashing LED Ditch Lights... they work GREAT with locomotive sitting still, regardless of track voltage.
Here is what I have done... from the track I pickup the AC voltage, rectify with a bridge, send the DC voltage to a 7805 regulator... the output of the 7805 DC- is sent to a purchased flasher board. The 7805 has .1 uf ceramic capacitors on input and output leads to ground... the DC+ output of the 7805 has 68 ohm resistor connected LED cathode... the flasher board is connected to the other side of the LED... the flashing is via DC- being switched.
EVERYTHING WORKS GREAT when locomotive is sitting still, regardless of the track voltage, BUT when the locomotive starts to move these LEDs operation become erratic, regardless of track voltage. I ALSO installed a 10 uf electrolytic across the LED connection, after problems cropped up, which helped, but still erratic.
Suspect back EMF from the dual motors???
I would appreciate you pointing me to one of your articles or somewhere else that may have a simple answer.
Exciting circuit... looks great... just erratic is all.
THANK YOU so much for any reference materials or assistance, Jay