2 Transistor LED Flasher #2:  (electronic design added 9/02)

2 Wire DC Lamp Dimmer Replaces Rheostats:  10/23/97 EDN-Design Ideas / (added 08/05) Originally for use in commercial trucks, a low-cost dc lamp dimmer (Figure 1) can control more than 100W of incandescent panel lighting and replaces a high-power rheostat, whose heating darkens  instrument panel.  circuit has several unique advantages: A two-wire connection means no change to existing wire harnesses, high efficiency means minimal heat sinking, and a typical circuit costs less than  rheostat it replaces.

2 Wire Lamp Flasher:  Ideal to operate3 to24 Volt DC existing on-Circuit lamps LED operation is also possible (added 6/06)

220 Volt Flashing Lights:  Especially designed for Christmas tree lamps to replace old rmally-activated switches (added 9/04))

230V Dimmer:  A reliable and efficient all-around performer. I bought  kit because it didn't cost me much more than  components were worth and I also got a nice professional-made PCB inside. As you can see, this is a tried-and-true diac & triac combination that offers both simplicity and high performance. With a load up to 3.5A,  power rating is 750W at 230V. A heat sink on  triac is a must!  Note: for 110V operation, add a 220k resistor in parallel with  470k pot. No or modification is necessary. But since  maximum allowed current is still 3.5A,  highest possible power output will drop to 380W.  (added 11/05)

250ksps 16-Bit Micropower ADC Offers an Excellent Combination of Size Power and Speed:  DN294  Design Notes (Linear Technology) (app note added 6/06)

2-wire Lamp Flasher:  This circuit has been designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert  circuit between existing lamp and negative supply. Especially suited for car or panel pilot lights, this device can drive lamps up to 10W....  (design added 11/06)

3rd Brake Light Pulser:  (electronic diagram added 6/03)

3rd Brake Light:  (electronic circuit added 4/05)

3-Way Dimming CFL Ballast:   3 way dimming system widely adopted in  US with conventional filament lamps consists of a light bulb that has a modified Edison screw type base which allows 3 connections to be made to a special lamp socket that also has 3 connections.  (added 3/05)

4 Channel Dimmer Rack:  (electronic circuit added 7/03)

40 LED Bicycle Light (555 Timer 6 Volt):  (circuit / schematic design added 6/06)

40 Watt Fluorescent Lamp Inverter:  This40W fluorescent lamp inverter allows you to run40W fluorescent tubes from any12V source capable of delivering3A. (added 4/02)

42 Watt Compact Fluorescent Ballast:   CFL-2 is an electronic ballast design for driving a 42 watt compact fluorescent lamp from a 120 or 230 volt AC line.  circuit was designed using  IR2156 Ballast Driver IC.  main features of  circuit are programmable frequency, preheat time, over-current threshold and dead time.  (added 3/05)

8 Bit Digital Light Intensity Controller:  (design circuit added 8/02)

8 Photo-Detector Circuit Board:  (diagram added 2/07)