undescriptive
Newbie level 3
Hi everyone,
I am trying to build a "simple" discrete analog circuit to control a high power RGB LED (3x3W).
The LED can be configured as either common cathode or common anode.
The circuit needs to do the following:
when power is applied, the LED should shine - colour is determined by 3 jumpers (RGB on/off)
There is a vibration sensor switch in this circuit, when this is triggered the LED should change colour - the colour is determined by another set of jumpers.
The triggering of the switch should make the second colour shine for a "visible" amount of time (0.25-0.5 seconds?)
The power source is an 18650 protected Li-Ion battery (3.7v, max 4A).
Considerations:
the LED is just resistored to get it in the "right" voltage range (nothing fancy)
Run-time isn't important, so consider the power-source as permanently "stable"
I would like to use SS8550DBU and SS8050DTA (as I have them available and they can handle the current per channel)
I feel this should be simple, but my initial playing is proving anything but!
I have tried a PNP as an "on" switch and then trying to trigger an NPN on the switch (simultaneously turning off the PNP and on the NPN) the "load" of each of those then runs to the jumpers and then onto a second NPN switch for each channel (RGB), but I can't seem to get it to work (lots of leakage and weird stuff going on!)
can anyone help with this circuit design?
I am trying to build a "simple" discrete analog circuit to control a high power RGB LED (3x3W).
The LED can be configured as either common cathode or common anode.
The circuit needs to do the following:
when power is applied, the LED should shine - colour is determined by 3 jumpers (RGB on/off)
There is a vibration sensor switch in this circuit, when this is triggered the LED should change colour - the colour is determined by another set of jumpers.
The triggering of the switch should make the second colour shine for a "visible" amount of time (0.25-0.5 seconds?)
The power source is an 18650 protected Li-Ion battery (3.7v, max 4A).
Considerations:
the LED is just resistored to get it in the "right" voltage range (nothing fancy)
Run-time isn't important, so consider the power-source as permanently "stable"
I would like to use SS8550DBU and SS8050DTA (as I have them available and they can handle the current per channel)
I feel this should be simple, but my initial playing is proving anything but!
I have tried a PNP as an "on" switch and then trying to trigger an NPN on the switch (simultaneously turning off the PNP and on the NPN) the "load" of each of those then runs to the jumpers and then onto a second NPN switch for each channel (RGB), but I can't seem to get it to work (lots of leakage and weird stuff going on!)
can anyone help with this circuit design?