Single Supply 16-Bit ADC Driver - This circuit shows the LT6203 driving an LTC1864 unipolar 16-bit, 250ksps A/D converter. The bottom half of the LT6203 is in a gain of 1 and buffers the 0V negative fullscale signal VLOW into the negative input of the LTC1864. The upper half of the LT6203 is in a gain of 10, referenced to the buffered voltage VLOW and drives __ Linear Technology/Analog Devices App Note, Jul 2, 2012
Single-Ended 2A3 Amp - This amp uses a 6C45pi input tube loaded by a 1:1 Interstage Transformer (I used the inexpensive model available from Allied Electronics). The 6C45pi is supposedly not rated for more than 200V on the plate, but I have not had any trouble with 300V in this application. You may not wish to follow in my footsteps if you paid a lot for your 6C45pi's __ Designed by Bob Danielak
Single-Ended to Differential Converter with Gain of +2 & Common Mode Control - Because the gains of each channel of the LT6411 can be configured independently, the LT6411 can be used to provide a gain of +2 when amplifying differential signals and when converting single-ended signals to differential. With both channels connected to a single-ended input, one channel configured with a gain of +1 and the __ Linear Technology/Analog Devices App Note, Mar 31, 2010
Single-sideband Demodulator covers the HF band - 10/26/00 EDN-Design Ideas The circuit in Figure 1 complements a previous Design Idea(SSB modulator covers HF band EDN , Sept 30, 1999, pg 122]. The modulator employs a phasing. Design by Israel Schleicher, Bakersfield, CA
Small Area Photodiode in Normal TIA Configuration - Small area photodiodes have low capacitance. To maintain low noise operation it is important to keep the input capacitance low so that the miniscule input noise current of the CMOS
amplifier, and not the voltage noise, dominates the overall circuit noise. The total input capacitance from the amplifier in this circuit is the __ Linear Technology/Analog Devices App Note, Mar 16th 2010
Soft Start for Power Amps - Although the soft start circuit can be added to any sized transformer, the winding resistance of 300VA and smaller transformers is generally sufficient to prevent a massive surge current. Use of a soft start circuit is definitely recommended for 500VA and larger transformers __ Designed by Rod Elliott ESP
Solid state linear HF Amplifiers - Not a project yet, but very theoretical thoughts about very practical amplifiers! __ Designed by Manfred Mornhinweg
Solid State Power Op-Amp Amplifier - LM675 Amp Schematics, only. This was my minimalist interpretation of the so-called "Gaincard" amplifier. It uses the minimum number of parts I could get away with. All parts are directly soldered to the IC leads for minimal stray inductance. It works and sounds suprisingly good! __ Designed by Bob Danielak
Solid-state Fender Blackface Preamp - All-FET version of the celebrated valve guitar preamp; Can be easily modified to Marshall Tone Controls specs __ Contact: Flavio Dellepiane, fladello @ tin.it
Song Number Display - Here’s a circuit to display the song number in an audio system for quick reference to songs. It also serves the purpose of an extra visual indicator in modern audio systems.When __ Electronics Projects for You
Sound Modifier - Four shape-controls portable unit; Wide variety of output waveforms __ Contact: Flavio Dellepiane, fladello @ tin.it
Spartacus AO-44 Guitar Slave Amp - small push-pull tube amp __ Designed by G. Forrest Cook
Splitter-Blend - The Splitter-Blend provides two buffered parallel effects loops with a Blend control. Also, a phase polarity switch is included to allow phase matching of the effect loops. Possible uses are blending two sets of effects placed in the loops, a signal splitter, a simple mixer, or to blend an effect with the dry signal. The phase inverter can be used for interesting results when mixing dry and effected signal. __ Contact: holler @ runoffgroove.Com
Spot-frequency Sine Wave Generator - 300Hz, 1KHz, 3KHz "output stable" test equipment tool.9V battery powered portable unit __ Contact: Flavio Dellepiane, fladello @ tin.it
Spreadsheet converts sound levels - 05/12/05 EDN-Design Ideas Calculate sound level versus source distance Design by Dan O'Brien, Mallory Sonalert Products Inc, Indianapolis, IN
Spring Reverberation Module - Build it and get great concert hall effects for your guitar or keyboard instrument. __ SiliconChip
Stage center reverb unit - Schematic only __ Designed by Craig Anderton
Stepped Gain Photodiode Amplifier - At low signal levels, the circuit has a high 100kΩ transimpedance gain, but at high signal levels the circuit automatically and smoothly changes to a low 3.1kΩ gain. The beneit of a stepped gain approach is that it maximizes dynamic range. __ Linear Technology/Analog Devices App Note, Mar 22, 2010
Stereo Audio Isolator - This circuit is useful for removing ground loop hum on a remote line level audio signal line. It can be used to to connect a computer sound card to a stereo amplifier's line input. Other uses include tapping into a line level signal for powering a remote amplifier, and removing common mode ground interference on 12 Volt audio equipment such as a car stereo. The circuit can be used in mono applications by simply ignoring the second channel __ Designed by G. Forrest Cook
Stereo power Audio Amplifier using TDA7297-2 x 15 Watts-Mute & Stand-by optional-Easy to assemble - complete stereo amplifier circuit including printed circuit board to power of 2 X 15 Watts. Using minimum of components in the integrated circuit TDa7297 ST Microelectronics. This IC presents in its interior two bridge amplifiers, making it useful for use where a stereo amplifier need easy assembly. may operate with voltages 6-18 volts and has […] __ Designed by Antonio Rodrigues
Stereo Push Pull 3CX300A1 Amplifier - The schematic is shown HERE. At some point I will add some detail for this amp, but it is loosely based upon my "Beast" amplifier, referenced elsewhere on this page. __ Designed by Bob Danielak
Stereo Width Controllers - Sometimes, for a variety of reasons, it would be nice to vary the width of the 'sound stage' when listening to stereo recordings. Although technically this is anything but hi-fi, it is a useful addition to PC speakers, or even for the music centre in the listening room. __ Designed by Rod Elliott ESP
Stomp Switch wiring - Stomp Switch wiring __ Designed by Guitar Effect RC Keen
Studio Switcher - Made for Radio Glen at Southampton University, and still in use at the re-named low power AM and web broadcasting station SURGE: Southampton University Radio from Glen Eyre. Triumph of relay based logic, or unnecessarily retro? You decide. Nothing with this many illuminated push switches can be all bad. __ Designed by Henry
Supreaux Deux - The Supro 16T adapted for use as a distortion stompbox. __ Contact: holler @ runoffgroove.com
S-Video Splitter (AC Coupled) - This figure shows an LT6551 quad amplifier driving two sets of S-video (Y/C format) output cables from a single Y/C source. Internal gain-setting resistors within the LT6551 reduce part-count. __ Linear Technology/Analog Devices App Note, Mar 25th 2010
Synthesized HF Receiver - This receiver was originally designed for simplicity and low cost, but, like other projects, it grew. My receiver is now synthesized and the performance is quite comparable to many commercial designs. The unusual features of this design are: * Common AF transistors and AF circuitry have been used for the IF amp, in a transformerless design. This aids construction and stability. ; * IF bandwidth is restricted by conventional L. C. tuned circuits which are not damped by any resistive or active devices. This gives a performance, even for CW working. The IF is 500KHz and NOT 465KHz. ; * Options for three different Local Oscillators. I used a Marconi Sig. Gen. with this receiver for over a year, before I overcame lethargy and built a decent LO __ Designed by Harry Lythall-SM0VPO |