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Simplest LED Flasher circuit - This may be the simplest
LED flasher circuit you can build, with the notable exclusion of LEDs with integrated flashing circuits. This
might be a good replacement for the LM3909 in some applications.
. . . [From Dick Cappels' project pages]
Simplified white-LED flasher operates from one cell
- 05/26/05 EDN Design Idea 1. 5V circuit flashes white LED. . . [by Anthony
H Smith, Scitech, Biddenham, England]
Single and Two Cell
White LED Drivers Without Inductors - . . . [From Dick
Cappels' project pages]
Single Cell TPS61041 LED Driver - LED lighting designers
are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED
lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's
broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface
control and embedded processors. LED designers have the option of not only controlling the power stage, but
regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .
[Texas Instruments App Notes, 9-Jun-03]
Single Cell TPS61041 LED Driver Slva136.Htm, 1 Kb - TI
Application Note. . .
Single microcontroller pin senses ambient light, controls illumination
- 10/26/06 EDN Design Idea LED circuit senses light and controls
its own brightness. . . [by Loren Passmore, Berkeley, CA]
Single NiCd Cells Drives Op Amp
- 12/05/96 EDN Design Idea . Low-supply-voltage op Amps, such as the LMC6582
and LMC6681 families, feature rail-to-rail I/O with a gain-bandwidth product greater than 1 MHz operating from
just 1. 8V. Although impressive, this voltage is not low enough to pow. . . [by Alexander Belousov, Rego Park,
NY]
Single-Cell White-LED Driver Uses Improvised Transformer
- 02/01/07 EDN Design Idea Minimal component-count circuit boosts a single
cell's voltage to light an LED. . . [by Jim Grant, Scientific Controls, Orlando, FL]
Single-ended driver for a
Circlotron OTL - Originally, this circuit was driving a
6B4G PP output stage. Transformer-coupled, naturally. I started with cap-coupled Mullard splitter using three
4P1L direct-heated loktal pentodes. Not bad at all, but had insufficient gain. Then I tried a plain Loftin-White
configuration with a LL1660 interstage (this one is a one-of-a-kind custom 30mA version. . . [klausmobile @
yahoo.Com]
Single-port pin drives dual LED - 10/13/05 EDN Design
Idea single-line LED driving can be versatile. . . [by Tom Gay, Dornstadt, Germany]
Single-Supply DC-Coupled
16-Bit, 125 MSPS Analog Front End for Bipolar Input -
For applications requiring a dual driver, such as I/Q receivers based on the dual AD9258 or AD9268 , the
ADA4930-2 driver is available. , Equipment Required The following equipment is required:, Bullet text, Getting
Started Software Installation The VisualAnalog software for the AD9265 is located at www. analog.
com/visualanalog and the FPGA data capture kit user guides are available at www. analo The software is compatible
with Windows XP (SP2), Windows Vista, and Windows 7 (32 bit or 64 bit). Install the evaluation software before
connecting the FPGA-based data capture kit to the USB port of the PC to ensure the evaluation system is correctly
recognized when connected to the PC. Setup and Test See the UG-074 User Guide for complete setup details on using
the software and running the tests. . . [Analog Devices-Circuits from the Lab]
Siren Driver Circuit
- Zetex Semiconductors have a siren driver IC Type ZSD100 available
that is suitable for use in alarm systems for cars and model craft. With the addition of only a few components as
shown in the diagram, the device produces an ear-splitting sound of 120 dB. The IC contains an a. f.
rectangular-wave generator that is driven by a. . . [Circuit posted by Popescu Marian]
Sinewave Generator -
There are dozens, probably hundreds of circuits for audio sinewave generators but certain 'old chestnuts' are
still favourite and the basic circuits haven't changed significantly since they were built with valves.. . .
[Page's Author: Richard Torrens]
Smoothly Drive Stepper Motors - 05/28/09 EDN Design
Idea Adding an analog switch make the motor bidirectional. The circuit in this Design Idea drives low-power,
unipolar stepper motors using only a shift register, a few resistors, and low-power transistors. Adding an
inexpensive 4053 analog switch allows bidirectional switching. Compared with other simple stepper-motor-drive
circuits, it has better-than-half-step characteristics (Figure 1). . . [by Uwe Schuler]
Solar Powered Flood
Light Using NiMH Cells - There are many solar powered
garden lights available. Most of the devices offered at the home improvement stores have very poor performance.
Their batteries are too small, the light launched is weak and the solar panels are undersized. None of the
devices I have tested would operate through a typical night . . . [Circuit by Dave Johnson P.E., 12/20/13]
Solar Powered
Infrared 1W Security Camera Illuminator - Many
security cameras are equipped with an array of infrared LEDs to illuminate an area in front of the camera with
invisible light for night time surveillance. However, there are times when a remote area, well away from the
camera, needs additional infrared light. The circuit below uses a modified solar powered path light to bathe a
fairly large area with 850nm infrared light . . . [Circuit by Dave Johnson P.E., 06/22/14]
Soldering iron driver bridge controls temperature -
09/06/13 EDN Design Idea With a power supply and a replacement soldering handle you can implement this
temperature-controlled soldering iron driver. One way you can control the temperature of a soldering iron is with
a microcontroller, using temperature feedback from the thermistor in the handle near the iron's tip. This Design
Idea presents a soldering iron driver that does this using only analog components. . . [by Kiril Karagiozov]
Solenoid Driver Is Adaptable and Efficient
- 06/04/12 EDN Design Idea Use capacitive reactance to save energy while
holding a solenoid in the energized position. Solenoid loads generally exhibit large hysteresis. Application of
the rated voltage actuates these loads. Once they are in position, however, you can use a significantly lower
voltage to thereafter reliably hold them on. A lower sustaining voltage results in less heat production and
higher efficiency. . . [by Jessica MacNeil]
Solenoid Driver Reduces Power and Cost
- 07/18/96 EDN Design Idea Solenoid valves commonly control the flow of
low-pressure gases and fluids in biological applications. A typical valve may operate at 12V and draw 1A. In
systems using such valves, these power requirements can cause cost and space problems, even though a
well-regulated supply is unnecessary. . . [by TG Barnett, Queen Mary College, London England]
Solid State Relay Requires Only
50ua Drive Current - This circuit demands a control
current that is 100 times smaller than that needed by a typical optically isolated solid state relays. It is
ideal for battery-powered systems. Using a combination of a high current TRIAC and a very sensitive low current
SCR . . . [Circuit by David Johnson P.E., 06/03/00]
Solid State Relay that is Bidirectional - The circuit
below can switch up to 4 Amps of current with a peak voltage up to 20v. It is fully isolated using two
inexpensive red LEDs. One LED forms a red light source, which illuminates a second red LED. The circuit takes
advantage of the 1. 5v . . . [Hobby Circuit designed by Dave Johnson P.E., 05/01/09]
Solid State Tesla Coil
Chapter 7 - In this chapter, we deal with the design of
the Tesla coil driver. We will discuss several components or subsystems, including the power supply, the
controller, the gate driver and inverter, the fast fuse, and the current sense resistors. . . [Solid State Tesla
Coil by Dr. Gary L. Johnson]
Sorting Out Backplane Driver Alphabet Soup
- Application Note. . . [National Semiconductor]
Sound
Triggered Night Light - A while back, I received a
schematic from a guy by the name of Karl. He described a situation he and his wife found themselves in aboard a
cruise ship in the Caribbean. They were staying in a room toward the inside of the ship, which did not have any
port holes, windows or a balcony . . . [Circuit by David Johnson P.E., 08/04/13]
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