Strange LED sequencer
This deceptively simple sequencer actually pulse width modulates the LEDs as it fades from one LED to the next. Bulbs will last much longer when driven in this ...
Strange LED sequencer
This deceptively simple sequencer actually pulse width modulates the LEDs as it fades from one LED to the next. Bulbs will last much longer when driven in this ...
LED or Lamp Flasher
* Flashing frequency can be varied by changing R1 value in the 1M - 4M7 range.
* This circuit is very efficient when driving a small 3.2V incandescent lamp...
LED or Lamp Flasher
* Flashing frequency can be varied by changing R1 value in the 1M - 4M7 range.
* This circuit is very efficient when driving a small 3.2V incandescent lamp...
LED or Lamp Pulser
This circuit operates a LED in pulsing mode, i.e. the LED goes from off state, lights up gradually, then dims gradually, etc.
This operation mode is obtained b...
LED or Lamp Pulser
This circuit operates a LED in pulsing mode, i.e. the LED goes from off state, lights up gradually, then dims gradually, etc.
This operation mode is obtained b...
White LED Head Lamp
This is a practical white LED head mount lamp (flashlight). Recently many white LED flashlights appear on the market. However, most flashlights require three ce...
White LED Head Lamp
This is a practical white LED head mount lamp (flashlight). Recently many white LED flashlights appear on the market. However, most flashlights require three ce...
Two-LED Pilot Light
This circuit was designed on request and can be useful to those whishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated...
Two-LED Pilot Light
This circuit was designed on request and can be useful to those whishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated...
Using white LEDs
The yellow LEDs are on a small PCB, which are easy to remove. On the PCB there is 3 yellow
LEDs and 4 diodes. Pictures of the PCB can be seen here : Top-side...
Using white LEDs
The yellow LEDs are on a small PCB, which are easy to remove. On the PCB there is 3 yellow
LEDs and 4 diodes. Pictures of the PCB can be seen here : Top-side...
Pocket LED Light
This is a pocket-sized LED flashlight operating with only one AAA battery. However, the super high luminosity LEDs(blue,green or white) require at least 3.5 vol...
Pocket LED Light
This is a pocket-sized LED flashlight operating with only one AAA battery. However, the super high luminosity LEDs(blue,green or white) require at least 3.5 vol...
98 LEDs Fantastic Atom Expander
Here is the schematic, PC board pattern, and parts placement for a "Fantastic Atom Expander". This circuit produces an "exploding atom" effect using 98 LEDs. # ...
98 LEDs Fantastic Atom Expander
Here is the schematic, PC board pattern, and parts placement for a "Fantastic Atom Expander". This circuit produces an "exploding atom" effect using 98 LEDs. # ...
LED power supply
Efficiency can be increased by using a germanium transistor at the 33 ohm current sense resistor, and by using a proper torroid core in place of the crappy ferr...
LED power supply
Efficiency can be increased by using a germanium transistor at the 33 ohm current sense resistor, and by using a proper torroid core in place of the crappy ferr...
Fading LEDs
This circuit operates two LED strips in pulsing mode, i.e. one LED strip goes from off state, lights up gradually, then dims gradually, etc. while the other LED...
Fading LEDs
This circuit operates two LED strips in pulsing mode, i.e. one LED strip goes from off state, lights up gradually, then dims gradually, etc. while the other LED...