I would like to improve that circuit of a single digit voltmeter, I want to make it measure voltage from -9 V to +9 V but I don't have any idea.so would you please give me an idea.
I would like it if we could finish that circuit soon ,because there someone who would like to sponsor me with money to buy the components for that circuit before he takes a business trip.so please when you have an idea please talk to me so that we can finish in soon.
This is the best configuration for now. maybe when i have time i will complete this for you. You have to put some efforts yourself to create this gizmo. That will also help you learn.
I have attached a document of the circuit explanation of my ultrasonic range meter. But now I want to know if Im going to insert with in series with my 1M ohm resistor for the feed back of the op-amp to tune it for perfect 100db if the pot is not going to cause a bit of inductance due to the high frequency.
Can you please help me with some calibration features/tips I can added into my circuits
Thanks and regards
oscillation circuit to control the sending-out time of the ultrasonic pulse.
The time of the oscillation pulse can be calculated by the following formula. Actually, with the error of the parts, it is different from the calculation a little.
The ultrasonic signal which was received with the reception sensor is amplified by 1000 times(60dB) of voltage with the operational amplifier with two stages. It is 100 times at the first stage (40dB) and 10 times (20dB) at the next stage.
I need to know as making an amplifier with a port USB as music storage in a memory Flash, which circuit integrated as independent DAC can use could give me some diagram that could use.
Greetings and respects
This is a very old emial from my thunderbird archive.
This project is a stand alone MP3 player, designed for home, car, or portable use. It plays a group of MP3 files stored on a standard or laptop IDE hard disk drive... hundreds of hours using even today's low-cost drives.
The firmware is available under the GPL, for anyone who want to really customize the player. High quality audio output is provided by a 24 bit DAC, using both standard line-level outputs and an amplified headphone output.
I need some details of a digital weight Indicator. mail from CA
Digital Weight Indicators and Weighing Scales use Strain Gauges mounted on a Stressed Beam, Cantilever or Plate which is also Elastic, means springs back to old shape.
Strain Gauges are bonded to these plates and connected in a Wheatstone bridge circuit. The output of these are very low, as less as 5mV. These are amplified close to the sensor and usable outputs in volts, like 0-10V are used to display the parameter or control the systems.
Fluids Weights are measured with pressure sensors also. Which also have a mini strain gauge or piezoelectric sensor to convert weight to millivolts.
Date 8/30/06 Simon and delabs Simon: hello, delabs: hello
Simon: we have many meanings for saturation, delabs: means turning on, also means no longer linear, or it is got fixed up, not varying in accordance to any formula
Simon: that is what is concluded of. but we just wanted to be sure. delabs: like you put salt in water. after some time no more salt can be dissolved, that is the state of saturation, In Electrical, no more relationship with V - I - R. Any increase in voltage or reduction it is same
Simon: thanks delabs: anytime
Bipolar transistors are so named because their operation involves both electrons and holes. These two kinds of charge carriers are characteristic of the two kinds of doped semiconductor material; electrons are majority charge carriers in n-type semiconductors,
This concludes this episode of Saturated Talk with Simple Simon. Next week, a new Episode which will cover effects of Lightning Bolts.
Transistor Operation - A transistor in a circuit will be in one of three conditions. Cut off (no collector current), useful for switch operation.In the active region (some collector current, more than a few tenths of a volt above the emitter), useful for amplifier applications.
"Saturation also implies that a large amount of minority carrier charge is accumulated in the base region. As a transistor is switched from saturation to cut-off, this charge initially remains in the base and a collector current will remain until this charge is removed by recombination."