op amp op-amp vs direct control
#op-amp
#voltage control
#current limit
#load resistance
#battery capacity
#parallel load
#circuit design
#electronics
Description: A 100 Ohm resistor connected to a 4.5 Volt supply (using three AA batteries) allows a current of 45 mA. However, at the upper end of the current sweep, the effective current will be significantly higher due to the load being in parallel. This current is primarily limited by the resistance of the load and the capacity of the battery.
In this circuit, a 100 Ohm resistor is used in conjunction with a power supply of 4.5 Volts, which can be achieved using three AA batteries connected in series. The nominal current flowing through the resistor under these conditions is calculated using Ohm's Law (I = V/R), where I is the current, V is the voltage, and R is the resistance. Therefore, with 4.5 Volts applied across a 100 Ohm resistor, a current of 45 mA is expected.
However, it is important to note that when additional loads are introduced in parallel to the resistor, the total current drawn from the power supply can increase substantially. This is due to the fact that parallel loads decrease the total resistance seen by the power supply, allowing more current to flow. The maximum current that can flow through the circuit is ultimately constrained by the internal resistance of the battery and its capacity, which determines how much current the battery can provide before its voltage drops significantly.
In practical applications, this configuration may be used in various electronic circuits where a specific current is required. Care must be taken to ensure that the load does not exceed the battery's capacity, as this could lead to overheating or damage to the components. The design should also consider the thermal characteristics of the resistor and load to prevent any potential failure due to excessive heat generation.100 Ohms at 4. 5 Volts (3xAA) allows 45 mA, but at the upper end of the sweep, due to the load being in parallel, it will be much higher - basically limited by the resistance of your load and your battery capacity. So yes, you can "smoke a pot" (heh!). Anindo Ghosh May 4 `13 at 6:36
In this circuit, a 100 Ohm resistor is used in conjunction with a power supply of 4.5 Volts, which can be achieved using three AA batteries connected in series. The nominal current flowing through the resistor under these conditions is calculated using Ohm's Law (I = V/R), where I is the current, V is the voltage, and R is the resistance. Therefore, with 4.5 Volts applied across a 100 Ohm resistor, a current of 45 mA is expected.
However, it is important to note that when additional loads are introduced in parallel to the resistor, the total current drawn from the power supply can increase substantially. This is due to the fact that parallel loads decrease the total resistance seen by the power supply, allowing more current to flow. The maximum current that can flow through the circuit is ultimately constrained by the internal resistance of the battery and its capacity, which determines how much current the battery can provide before its voltage drops significantly.
In practical applications, this configuration may be used in various electronic circuits where a specific current is required. Care must be taken to ensure that the load does not exceed the battery's capacity, as this could lead to overheating or damage to the components. The design should also consider the thermal characteristics of the resistor and load to prevent any potential failure due to excessive heat generation.100 Ohms at 4. 5 Volts (3xAA) allows 45 mA, but at the upper end of the sweep, due to the load being in parallel, it will be much higher - basically limited by the resistance of your load and your battery capacity. So yes, you can "smoke a pot" (heh!). Anindo Ghosh May 4 `13 at 6:36
Charge the battery capacity tester and realize the scheme
Battery capacity is a crucial indicator of battery quality. There are various methods for testing the volume of rechargeable batteries. One approach involves analyzing the discharge curve of the battery through short-term discharge tests, which can provide a rough estimate...
Accurate-variable-gain-circuit
The circuit can utilize any general-purpose, low-offset, low-drift operational amplifier (op amp), such as the OP-07. The differential signal from the bridge feeds into an amplifier that drives a standard, rugged ±50 µA meter. However, near the null point, the...
DOD Phasor 595
Protection against reverse voltage is implemented. A 10µF capacitor provides additional DC filtering. The CD4007 is configured as a flip-flop controlled by a foot switch. The output of the flip-flop drives the indicator. An 18V supply passes through a 100kΩ...
Op-Amp Microphone Preamp
A high-quality microphone preamplifier utilizing a single power supply, suitable for both dynamic and electret microphones. The operational amplifier (op-amp) employed can be any low-noise, high-performance type, such as the NE5534, TL071, or OPA 371. The schematic illustrates the configuration...
op amp Why the resistor in this op-amp circuit
Here is a circuit diagram for a signal response test circuit from the specification sheet for a HA-5195 operational amplifier. It appears to be a non-inverting amplifier circuit with a gain of 5, along with a 200-ohm resistor connecting Vout...
Guitar Control
The IC1A operational amplifier is configured as an inverting amplifier, with its gain determined by a three-way switch that connects different resistor values in parallel to resistor R4. This input stage is succeeded by an active three-band tone control stage,...
TWO CHANNEL AUDIO MIXER
The figure illustrates a fundamental two-channel operational amplifier (op-amp) mixer circuit. The gain for channel 1 is determined by the ratio of resistors R5 to R1, while for channel 2, it is determined by the ratio of R5 to R2....
op amp Could someone help me understand this simple circuit
The circuit operates in receive mode, with the Push-To-Talk (PTT) switch enabling transmit mode. The speaker functions as both a microphone and a speaker. Most systems observed utilize a rocking armature transducer for the speaker. There is no base station...
Triangle / Squarewave Generators
A simple triangle and square wave generator utilizing a common 1458 dual op-amp, capable of operating from very low frequencies up to approximately 10 kHz. The time interval for one half-cycle is determined by the product of resistance (R) and...