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Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:
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Rail Gun, buiding project Research lab - This page carries the images and videos of the Rail Gun construction effort; a 120-hour endeavor that cost approximately $800 of my own money, not counting sponsor-supplied materials. All images are high resolution; the original can be seen by clicking on the thumbnail.
Rail to rail audio power amp - In winter 2015, I built 5 HF regens plus 2 VHF super regenerative receivers. I’ve run out of my better quality air variable capacitors, potentiometers and room — each version seems larger and uglier than the previous. With all these experiments, I’ve advanced about 2 mm up the regen receiver design learning curve — and in standard form factor, more questions arose than answers. __ Contact: Vasily Ivanenko
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Rail-to-Rail 1MHz Pulse Width Modulator - In applications where a high frequency variable PWM generator is needed, the LT1715 provides a small and simple solution, as shown in the circuit of Figure 10. The top comparator, U1A, acts as a ramp generator. Biasing resistors R1 and R2 and a 7:1 positive feedback ratio through R3 set the positive input to approximately 2.5V±250mV. __ Linear Technology/Analog Devices App Note, Mar 31, 2010
Rail-To-Rail Amplifiers Operate on 2.7V with 20µV Offset - DN230 Design Notes __ Linear Technology/Analog Devices
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Rail-To-Rail I/O & 2.4V Operation AlLow Ultrafast Comparators to Be Used on Low Voltage Supplies - DN248 Design Notes __ Linear Technology/Analog Devices
Rail-to-rail Op Amp provides biasing in RF Amp - 01/20/00 EDN-Design Ideas It is often useful to monitor the dc level of an RF signal. However, most RF systems use capacitive coupling; thus, the dc information is lost. The circuit in Figure 1 is an RF amplifier comprising two monolithic microwave integrated circuits (MMICs), IC 1 and IC 2 , and a quad rail-to-rail op amp (IC 3 , an LT1633). IC 3A restores the dc level at the output. Design by Frank Cox
Rail-to-Rail Voltage Comparator - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc
Rail-to-Rail Voltage Comparator-23007.0 - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc
Rail-to-Rail Voltage follower/Buffer - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc
Rail-to-Rail Window Comparator-23008.0 - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc
RC Notch Filter (Twin T) - The twin T notch filter can be used block an unwanted frequency or if placed around an op-amp as a bandpass filter. The notch frequency occurs where the capacitive reactance equals the resistance Xc=R and if the values are close, the attenuation can be very high and the notch frequency virtually eliminated __ Designed by Bill Bowden
Reduced Power Infra-Red Diode Driver - Infra-Red LEDs can be used as continuously operating beams of light. Sensing a break in the path of light between the source and a photodiode receiver is often used in safety and alarm systems. To extend the run-time of the light source, the diode conducts the minimum current necessary, in this case 10mA. Controlling the duty __ Linear Technology/Analog Devices App Note, Mar 16th 2010
Regen receiver #4 - This Winter, after a ~4 year hiatus from regenerative receivers, I built 4 while studying the plethora of published designs in print and on the web. How do you describe the sounds that regens deliver? Perhaps the adjective "screechy", or adjective-verb phrase "alive with vibe" might do --- and when tuning across a SWL band they emit those classic wee-woo sounds that signal we're close to receiving some yet unknown, far off, station __ Contact: Vasily Ivanenko
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Regenerative receiver #5 - In winter 2015, I built 5 HF regens plus 2 VHF super regenerative receivers. I’ve run out of my better quality air variable capacitors, potentiometers and room — each version seems larger and uglier than the previous. With all these experiments, I’ve advanced about 2 mm up the regen receiver design learning curve — and in standard form factor, more questions arose than answers. __ Contact: Vasily Ivanenko
Resistance Measurement using Sample & Hold Method - A sample and hold circuit, as the name implies, samples an analogue input signal and holds its value until the input is again sampled.Fig.1 shows the basic principle of the __ Electronics Projects for You
Resistive DAC & Op Amp Form Hybrid Divider - 17-Sep-09 EDN-Design Ideas A programmable resistance is all you need in a feedback loop Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia
RF oscillator uses current-feedback op Amp - 10/03/02 EDN-Design Ideas A current-feedback amplifier is a well-known component with many uses. Its basic block diagram shows that its input stage is a voltage follower—in practice, a symmetrical emitter follower(Figure 1). The configuration samples the output current, converts it to voltage across a large impedance, and amplifies it to the output using a high-power, low-output-impedance amplifier Design by Victor Koren, Tioga Technologies Ltd, Tel Aviv, Israel
Robust high voltage Over-the-Top op-amps - EDN-Design Ideas 01/29/2016 LTC Design Notes: Learn how the innards of an “over-the-top” op-amp work (where inputs can be higher than V+), as well as related design considerations. Maintains high input impedance with inputs driven apart or when powered down Design by LTC Design Note |
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