Hello, I have to design a single op amp circuit that has only +15v, -15v and GND as input and outputs a symmetrical PWM signal (+V and -V) with adjustable frequency and duty cycle. I have something that works partly but not completely, I can adjust the duty cycle from ±60% to ±100% but af that...
Hi everyone, I'm new in this forum and this is my first post. I'm a software developer but electronics has always been one of my favourite hobbies. I don't have experience in RF circuit design, and for this reason I'm here trying to find someone that can help me in this project. I'll try to be...
like many the Oscillator died in my Huntron 1005B. as you know they are no where to be found. I came across the old kit schematic and figured I would try and build one. My 1st problem was IC1 and IC2 as they are not identified in the original schematic. I was told by some members to try...
I found an oscillator circuit and there are two parts not identified. IC1 and IC2. The symbol looks to be Zener diodes but There is no value .Would anyone have an idea what they could be?
Please see The schematic ,bottom left corner
Best regards to all,
This is my running circuit and its waveform. I have met the requirements set by my instructor in which Vrms=2.5 and is operating at <100Hz. My only problem is now making a sinusoidal waveform. I have tried a bunch of things like removing the C2 capacitor and adjusting some of the values but...
I need the simplest circuit to run 250 crystal oscillators at once.
The circuit must give a sharp pulse to all the crystals at 1Hz.
The idea is the get them all "ring" and resonate with each other.
They are regular 32khz cylinder oscillators used in watches.
I decided to design a Colpitts oscillator with an output frequency of 1,2 MHz followed by a buffer stage. No other specs for the moment.
I would prefer to keep unchanged the coil (I got it salvaged from old radio gear) and the transistors while using a +9V PSU.
Once having it working I would...
I am a newbie in electronic field. Now I am trying to design a circuit to drive QCM (Quartz crystal microbalance). In some literature I have seen some comparator-based designs like this:
In fact, some similar designs can also be found in the datasheets of high-speed comparators...
I need to generate 2 signals: a square wave of a pretty low frequency, say 10hz. Right now I'm using a 555 timer to generate the square wave. I also need another square wave 90 degrees out of phase.
How can I do this?
I've attached a picture of the signals I need.
Thank you in advance.
It's my first post. I'm new in electronics fields. I'm french and my english is not very good, excuse me.
I want to make a VHF oscillator(~ 30 MHz) that his frequency can change with the value of the capacitance.
I found in an another post the RF2506 which seems to works but it's...
I am new to LTSPICE and have been experimenting with designing with op amps as filters and oscillators
I recently came around this circuit of a "squarewave oscillator" in LMx58 Datasheet and with an aim to replicate it i decided to use an op amp in the LTSPICE viz. LT1007 to create a similar...
Hello, I am trying to simulate a 32.768 kHz Pierce oscillator.
I am referencing this particular crystal https://support.epson.biz/td/api/doc_check.php?dl=brief_FC-255&lang=en
I believe my values are correct, however, the peak frequency of the FFT is almost only depended on the td value of the...
Hi, I was looking since some days for a schematic to build a sawtooth and triangular wave generator, then I found this schematic on an online simulator: https://www.falstad.com/circuit/e-555saw.html (I report the original link, obviously, to give credits to the person which has made this...