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power supply How to measure the capabilities of a wall adapter – Circuit Schematic
power supply How to measure the capabilities of a wall adapter
The device exhibits 24V at no load on pins +4, 5 and -7, 8. According to Wikipedia, this is called a passive power injector. I tried drawing 1A from the device ...
power supply Can this temperature-controlled fan circuit be modified for different input voltage – Circuit Schematic
power supply Can this temperature-controlled fan circuit be modified for different input voltage
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power Problem with high voltage in a project – Circuit Schematic
power Problem with high voltage in a project
A circuit that should be protected from high voltage. Is there any component other than a fuse that I don`t have to change every time Something like a switch th...
transformer Single pole AC to DC conversion circuit – Circuit Schematic
transformer Single pole AC to DC conversion circuit
A remote control light switch that fits into the existing light switch panel. And to power up the electronics that would requires a 3. 3V DC supply. The problem...
Advice on ground plane in my first PCB – Circuit Schematic
Advice on ground plane in my first PCB
Schematic drawn using OrCAD Capture, which is straight out of the datasheet of the flyback controller LT3748. This is a class project and we must build our own ...
power supply Inductive choke with bypass capacitors – Circuit Schematic
power supply Inductive choke with bypass capacitors
Using an inductor inline and a decoupling capacitor it`s creating essentially a series LC circuit. Now one of the properties of LC circuits is they have a reson...
USB powered device with multiple Decoupling Capacitors – Circuit Schematic
USB powered device with multiple Decoupling Capacitors
A USB powered device with multiple IC`s. From what I`ve read it`s standard practice to use a combination of multiple range capacitors for decoupling each indivi...
power supply NMOS FET selection for reverse polarity protection – Circuit Schematic
power supply NMOS FET selection for reverse polarity protection
A reverse polarity protection circuit, similar to that in Figure 2 of SLVA139: Reverse Current/Battery Protection Circuits. Here is my circuit: My case is sligh...
power supply Transistor current limiter microcontroller controlled – Circuit Schematic
power supply Transistor current limiter microcontroller controlled
Rsense would cause Q2 to conduct if at a threshold (0. 65V assumably) and Rbias will determine how much it will be limited, however that is unclear to me, espec...
Ripple current in a linear power supply transformer – Circuit Schematic
Ripple current in a linear power supply transformer
BTW, I guess I should add another input cap for high frequency noise though that`s hardly relevant to this question (and the schematic is just a very rough test...
switch mode power supply design of current load sense circuit – Circuit Schematic
switch mode power supply design of current load sense circuit
A suitable method to sense when some LEDs in my Garage Door Opener are on. A power source (perhaps the same as Vout below) runs to a 1. 5Kohm resistor which run...
microcontroller How does this power supply circuit work? (MCU + LM317) – Circuit Schematic
microcontroller How does this power supply circuit work? (MCU + LM317)
The filter R1, R2 and C1 integrate the PWM waveform. But what is the point of the op-amp It looks like a non-inverting amplifier to me, with the gain set by R6 ...
SCHEMATIC DIAGRAM OF POWER SUPPLY BOARD ASSEMBLY RANGE SWITCH AND OWER SWITCH – Circuit Schematic
SCHEMATIC DIAGRAM OF POWER SUPPLY BOARD ASSEMBLY RANGE SWITCH AND OWER SWITCH
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Regulated power supply – Circuit Schematic
Regulated power supply
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Compensation Resistor Stabilizes SMPS at High Duty Cycles – Circuit Schematic
Compensation Resistor Stabilizes SMPS at High Duty Cycles
Current-control switching-mode power supplies (SMPS) are gaining in popularity because they allow pulse-by-pulse current control and monitoring, making them mor...
Power Factor Correction (PFC) Circuit Reduces MOSFET Miller Effect – Circuit Schematic
Power Factor Correction (PFC) Circuit Reduces MOSFET Miller Effect
By adding a discharge path to the upper MOSFET of a cascode circuit, the unavoidable Miller effect is greatly reduced and the PFC performance of a power supply`...
Simple circuit shuts off system when supply voltage is low – Circuit Schematic
Simple circuit shuts off system when supply voltage is low
When supply voltage drops below a minimum threshold, it`s often good practice to disconnect the supply from the system to prevent poor performance or erratic op...
R-C Twin-Tee Circuit Reduces Power-Supply Hum – Circuit Schematic
R-C Twin-Tee Circuit Reduces Power-Supply Hum
The R-C twin-tee passive circuit supplies band-reject (notch) filtering to portable applications. It has a circuit Q (loaded) of 0. 25. Satisfactory rejection c...
Simple Power Supply Suits VoIP/PoE Applications – Circuit Schematic
Simple Power Supply Suits VoIP/PoE Applications
Designing a power supply that meets the demands of Power over Ethernet (PoE) and Voice over Internet Protocol (VoIP) applications can be challenging. The low co...
switching power supply 4 – Circuit Schematic
switching power supply 4
The MAX1846 inverting circuit to implement a switch-mode power supply that provides a -15V at 0. 5A output from a 4. 5V to 12V input. This MAX1846 circuit also ...