Clik here to view.
Reverse diode across power supply output terminals
simulate this circuit– Schematic created using CircuitLabHello,Could someone please explain the role of the D1 diode in this circuit? This is part of the power supply filtering in a VHF receiver.This...
View ArticleCan flyback diodes damage DC brushed treadmill motors?
I am confused again. I just watched a recent YouTube video today where the host claims a flyback diode is not only unnecessary, but a bad idea for treadmill DC motors. He "demonstrates" it by quickly...
View ArticleDiode model as RF Switch in CST schematic working as open and short circuit
I'm designing an antenna and want to change the impedance with diode. The diode should do switching as open and short circuit (ON/OFF state). In other words, the reflection coefficient of antenna with...
View ArticleClik here to view.
SMPS floating ground safety
I have a Mean Well SMPS (RS-15-12) with an isolated DC output. From my understanding, a floating ground is basically a 0V reference without any connection to mains earth (hence floating).However, what...
View ArticleDiode-less op amp circuits that can simulate a diode
Gyrators can be used to simulate circuit properties of inductors. Is there something similar you can do, where you use a circuit with no diode to simulate a diode?
View ArticleClik here to view.
Op-amp plus diodes: resistors' values calculation
I am tasked with following: R1, R3 and R3 are to be calculated so that the diodes work in forward bias. Assuming the diodes have a voltage drop of 0.7 V and the op-amp is ideal I have calculated that...
View ArticleClik here to view.
Explain the circuit inside a rechargeable hair trimmer
I have a small, normal hair trimmer:This is the circuit inside it:Some information:The batteries are two rechargeable Ni-Cd 1.2V batteries.D1 has 0.7V forward voltage.LED (marked with "CHARGE" on the...
View ArticleClik here to view.
LTspice: photodiode current
I am working on building a circuit using the SG01D-5Lens (opamp: LMC6001) in LTspice, based on the values from the datasheet, in order to verify whether the theoretical values match the simulation...
View ArticleCan functional diodes and capacitors be printed on a PCB instead of soldering?
I want to print a fractal, capacitor circuit, network using diodes in strings of 3, with 2 capacitors in each circuit. The goal is to get 96 capacitors and 144+ diodes on the board. That is a lot of...
View ArticleA combination of 1N4007 diodes in place of M7
Can I use a combination of 1N4007 diodes in place of M7? If yes, what's the arrangement? M7 is a surface mount general rectifier with a reverse voltage of 50 to 1000 and a forward current of 1 amp.
View ArticleClik here to view.
Diode current voltage characteristic issues
I'm trying to find current-voltage characteristic of a red LED diode in the biggest possible range using 5 3 V batteries, 1 100 Ω resistor and 10 diodes, but my graph is wrongThe measurement is taken...
View ArticleClik here to view.
Detector for a fiber optic gyroscope
I'm a navigation engineer, so I often have to deal with gyroscopes and their measurements. Out of curiosity, I've decided to build one myself and will give it a try with a Fiber Optics Gyroscope (FOG),...
View ArticleClik here to view.
Am I right in calculating my schematics?
I’m studying electronics at university, but I didn’t quite understand the topic. Experts, could you check if my calculations for the first two circuits are correct? And please help me understand how to...
View ArticleClik here to view.
Can anybody help me identify IC 1Q0__?
Can anybody help me identify this burnt IC (the markings are partially obstructed):
View ArticleClik here to view.
Resonant frequency of a tuning circuit with varactors
This is the circuit that I'm simulating in LTSpice:I measured the experimental resonant frequency of the circuit by finding the frequency at which \$V_\text{out}\$ peaks for different values of...
View ArticleClik here to view.
BJT transistors using diodes?
I am researching about Bipolar Junction Transistors and found this image on website: Circuit Crush - How a BJT Works, figure 4:I know that this configuration of diodes is not correct due to the way how...
View ArticleClik here to view.
PV cells (photovoltaic) I-V curve plot simulation
I am trying to plot the I-V curve using python because that helps me in understanding PV cells / solar panels (and diodes as a general thing).I know the formulas have lots of inter-dependent variables...
View ArticleClik here to view.
Why is collector current in a diode-connected transistor not subject to the...
In a recent comment I was asked why a diode-connected transistor behaves as it does.Jonk's answer here addresses this question, and explains that the geometry of the B-E junction in a signal BJT yields...
View ArticleClik here to view.
Schottky Diode with High Frequency Signal
I have an issue with my Circuit, it looks following:The circuit consists of a current limiting resistor the Schottky Diode NSVR0170HT1G and an ESD Diode in parallel. A MCU is driving the PWM Signal...
View Article