NVIDIA introduced the mini-computer for the creators of robots and drones

NVIDIA introduced the mini-computer for the creators of robots and drones. Manufacturer graphics cards, the company NVIDIA, submitted a "computer-on-module" - a stand-alone kit is designed for installation in robots, drones and other devices. Jetson TX1 module the size of a bank card includes a processor, RAM and internal memory, network interfaces, and is valued at $ 300, which is available for the "technologist."

Independent programmable module need enthusiasts and businesses to create their own gadgets based on it. Jetson TX1 is equipped with a processor Tegra X1 with 256 cores on the architecture of NVIDIA Maxwell, 4 GB of RAM and 16 GB of internal memory, modules Wi-Fi, Bluetooth and Ethernet.

The creators of the mini-computer argue that it will implement the functions of machine learning: image recognition, speech processing. Sales Jetson TX1 will appear in early 2016.

Read More

Simple Ac line Voltage Announcer Circuit Diagram

This is the Simple Ac line Voltage Announcer Circuit Diagram. The range of this simple ac-voltage monitor is 100 to 140 Vac, with a resolution of 1 V. The speech processor interprets an 8-bit binary input code from an analog-to-digital converter. The processor`s pulse-code-mod ulated output then passes through a filter and an amplifier before driving tbe circuit`s speaker to vocalize the corresponding number. Each time switch S1 is _pressed, the speech-processor program enun ciates tbe monitored voltage readings from 100 to 140 V, depending on the code at the input of a 27C64 EPROM.

 Simple Ac line Voltage Announcer Circuit Diagram

 

 

The voltage-monitoring circuit consists of a bridge rectifier, filter capacitors, and a 10-Kilload resis tor. A divider, RA and RB, limits the input voltage to a maximum 2.55 V. The aid converter, IC4, then sends the voltage reading to tbe 27C64 EPROM, ICS. Pressing Sl sends a negative transient pulse to the write, WR, input of the aid converter, IC4, which initiates a 100-ttS conversion process. [Link]

Read More

Simple Stethoscope Circuit Diagram

The stethoscope is a medical or veterinary use tool, in which the professional can hear the heartbeat, breath or other bodily sound of his patient. We can say that the operation of the stethoscope is simple, the recorded sound is amplified and taken directly to the ear by a pipe. The stethoscope is also called phonendoscope, it has two different pickups sound the bell and diaphragm.

The traditional stethoscope is an acoustic equipment, and its pickup of sounds, are specific, the bell and one of the pickups that come in contact with the body, and its function is to capture bass. Have the diaphragm is used to capture the treble, all for a physical process, without the use of electronic circuits.
The Electronic Stethoscope

An electronic stethoscope or estetofone , has the ability to overcome low levels of noise, electronically amplifying body sounds. But this electronic system turns out to be limited the microphone audio frequency responses (pickup) and speaker, something that does not occur in acoustic stethoscopes.

Still there are a large number of companies offering electronic stethoscopes that rely on conversion of acoustic sound waves into electrical signals that can be amplified and processed making a faithful sound system, almost equal to the acoustic. Electronic stethoscopes sold commercially using various systems, the most common is a piezoelectric crystal placed in behind a foam rubber membrane as a pickup.

Simple Stethoscope Circuit Diagram

The evolution of electronic stethoscopes also made possible the emergence of new tests as the phonocardiogram and telemedicine which allowed remote diagnostics.

The circuit simpler and less effective sound detection is achieved by a set of a microphone, an amplifier and a speaker or earphone. This method suffers interference from environmental noise but can be used as a simple electronic stethoscope. Precisely, the simplest is that we show here in this article.

Above the electronic stethoscope circuit, its operation is as follows, one capsule, electret microphone is used as sound pickup, the U1A integrated circuit which is a TL072 has the low noise pre-amplifier function. Your gain is less than 3.9, which is due to the high output impedance of the electret microphone.

The capacitor C2 has a relatively large capacitance, as it filters, leaving only pass the low frequency (20-30 Hz) that are the sounds of a beating heart. The U1B mounted on a Sallen-Key filter low noise with a cutoff frequency of about 103 Hz. R7 and R8 set the gain level of the order of 1.6. The integrated circuit U5 which is a LM386 audio amplifier with an output of 0.25 watts. Part of the U4 integrated circuit can be optional, it is an operational amplifier 741 that controls the two-color LED.

Electronic Stethoscope components list

R1 - 10k ¼ W resistor
R2 - 2.2 ohm ¼ W resistor
R3, R9 - Not used
R4 ¼ W 47 Ohm resistor
R5, R6, R7 - 33K resistor ¼ W
R8 - 56 Ohm resistor ¼ W
R10 - 4k7 ¼ W resistor
R11 - variable resistor of 2.2 logarithmic
R12 - resistor 330 Ohm ¼ W
R13, R15, R16 1K resistor ¼ W
R14 - resistor 3.9 ohm resistor ¼ W
C1, C8 - electrolytic capacitors 470 uF / 16 V
C2 - electrolytic capacitor 4.7 uF / 16 V
C3, C4 - Polyester Capacitors 0.047 uF / 50 V
C5 - ceramic disc capacitor 0.1 uF / 50 V
C6, C7 - electrolytic capacitors 1000 uF / 16 V
U1 TL072
U2, U3 Not used
U4 - 741
U5 - LM386
MIC - electric microphone three terminals

The circuit is very simple and can be mounted on breadboard, on the microphone connection with the circuit should be used shielded cable to prevent noise pickup. You must mount the pickup so that the microphone is placed at a distance from the skin surface but one that is close to the body to protect the microphone from external noise.

Keep the microphone away from the headphones to avoid feedback. Unfortunately, the device offers a very limited application, use it only as a learning circuit, test or demonstration. Link

Read More

Frequency shift keying Demodulator - Tone Decoder with RC2211N

This is a simple Frequency shift keying Demodulator - Tone Decoder with RC2211N Circuit Diagram. Frequency-shift keying (FSK) is a frequency modulation scheme. A monolithic phase locked loop for data communications. The IC contains a basic phase locked loop for tracking an input signal within the pass band, a quadrature phase detector which provided carrier detector and an FSK voltage comparator which provides FSK demodulation. In the circuit shown, the IC is used as an FSK demodulator such as would be found in the receiver circuit of a modem. The table below shows the component values required for a modem demodulator using standard European tones on the public switched network.

Frequency shift keying Demodulator - Tone Decoder with RC2211N Circuit Diagram

Read More

Build a Ups 5 Volt Circuit Diagram

How to Build a Ups 5 Volt Circuit Diagram? This is a simple circuit diagram in this circuit A 9-V wall adapter supplies Vm. IC2 contains a low-battery detector circuit that senses l7IN by means of R6 and R7. The detector output Cpin 7) drives an inverter (Ql), which in turn drives the shut-down inputs Ic of 1C1 and SHDN of IC2. These inputs have opposite-polarity active levels. 

The common feedback resistors, R2 and R3 enable both regulators to sense the output voltage, V0VT. When IC2 shuts down, its output turns off. However, when IC1 shuts down, the whole chip assumes a low-power state and draws under 1 . LI, D2, Gl, C2, R2, and R3 are part of the 250-mW switching regulator. Diodes D3 and D4 wire-OR the power connection to IC2, and 03 improves the linear regulator`s load regulation.

 Ups 5 Volt Circuit Diagram

Read More

Build a Simple Single-Chip Dc Supply Circuit Diagram

How to Build a Simple Single-Chip Dc Supply Circuit Diagram. This Simple Single-Chip Dc Supply Circuit Diagram Direct derivation of 5 to 24 Vdc from ac mains, without a transformer is possible with this circuit. Note that a direct mains connection to the dc output exists. Suitable safety precautionary must be taken.

 Simple Single-Chip Dc Supply Circuit Diagram

Read More

Fifty Percent Wave Rectifier Circuit Diagram

This is a simple Fifty Percent Wave Rectifier Circuit Diagram. This Fifty Percent Wave Rectifier Circuit Diagram provides for accurate half wave rectification of the incoming signal. For positive signals, the gain is 0; for negative signals, the gain is — 1. 

By reversing both diodes, the polarity can be inverted. This circuit provides an accurate output, but the output impedance differs for the two input polarities and buffering may be needed. The output must slew through two diode drops when the input polarity reverses. The NE5535 device will work up to 10 kHz with less ttan 5% distortion.

Fifty Percent Wave Rectifier Circuit Diagram

Read More

Simple Voltage Multiplier Circuit Diagram

This is a Simple Voltage Multiplier Circuit Diagram. This Simple Voltage Multiplier Circuit Diagram we build to day. how to build lets start. Figure 99-l(a)`s circuit exhibits a high-output impedance as a result of the small effective capacitance of the series-connected capacitors, and it exhibits considerable voltage loss due to all of the diode drops. Further, this circuit requires 2 diodes and 2 capacitors to produce a dc output voltage approximately times the rail voltage. Figure 99-1 (b)`s circuit multiplies more effectively using fewer diodes and capacitors. 

 Simple Voltage Multiplier Circuit Diagram

The parallel arrangement of the capacitors lets you use smaller capacitors than those required in Fig. 99-1(a). Alternatively, when using the same capacitor values of Fig. 99-1 (a), the output impedance will be lower. Whereas the clock source directly drives only one of the two strings of capacitors in Fig. 99-1(a), Fig. 99-l(b)`s clock drives both strings with opposite phases. 

This drive scheme doubles the voltage per stage of two diodes. A final diode is necessary to pick off the dc output voltage because both strings of capacitors now carry the - p ac input-voltage waveform. The ICL7667 dual-FET driver accepts a TTL drive swing and provides a low-impedance push-pull drive to the diode string. This low impedance is particularly helpful when using a long string to raise output voltage to more than 100 V, starting from a low rail voltage.  

Read More

Build a Programmable Zener Circuit Diagram

How to Build a Programmable Zener Circuit Diagram. The ICL8212 is connected as a programmable zener diode. Zener voltages from 2 V up to 30 V can be programmed by mostly suitable selecting R2. The zener voltage is: Because of the absence of internal compensation in the ICL8212, CI is necessary to ensure stability. 

 

Two points worthy of note are the extremely low-knee current (less than 300 ) and the low dynamic impedance (typically 4 to 7 ohms) over the operating current range of 300 to 12 mA. 

Programmable Zener Circuit Diagram

Read More

Build a Stand by Power Circuit Diagram for Non Volatile Cmos Rams

This is  a simple Stand by Power Circuit diagram for Non Volatile Cmos Rams. To prevent loss of data when a CMOS RAM is switched from normal operation (Vcc = 5 volts) to stand-by mode (Vcc = VBAT) it must be ensured that the CS pin goes near the Vcc rail at all times. 

Ac coupling to the chip select is made through capacitor C, breaking the dc current path between Vqq (and hence VBAT) and the decoder output. So, whatever the impedance state of the decoder in power down, the battery will provide current only for the RAM, low enough to keep the voltage at CS near to V^.

Power Circuit Diagram

Read More

Best Electronic Crowbar Circuit Diagram for AC or DC lines

This is Best Electronic Crowbar Circuit Diagram for AC or DC lines. For positive protection of electrical or electronic equipment, use this against excessive supply voltage. Due to improper switching, wiring, short circuits, or failure of regulators, an electronic crowbar circuit can quickly place a short circuit across the power lines, thereby dropping the voltage across the protected device to near zero and blowing a fuse. 

The triac and SBS are both bilateral devices, the circuit is equally useful on ac or dc supply lines. With the values shown for Rl, R2, and R3, the crowbar operating point can be adjusted over the range of 60 to 120 volts dc or 42 to 84 volts ac. The resistor values can be changed to cover a different range of supply voltages. The voltage rating of the triac must be greater than the highest operating point as set by R2, II is a low power incandescent lamp with a voltage rating equal to the supply voltage. 

Best Electronic Crowbar Circuit Diagram for AC or DC lines

It may be used to check the set point and operation of the unit by opening the test switch and adjusting the input or set point to fire the SBS. An alarm unit such as the Mallory Sonalert may be connected across the fuse to provide an audible indication of crowbar action. (This circuit may not act on short, infrequent power line transients).

Read More

Build a Photomultiplier Circuit Diagram

How to Build a Photomultiplier Circuit Diagram? This Photomultiplier Circuit Diagram is typical of the way that a photomultiplier tube is used. The circuit shown is ac coupled, but if dc coupling is needed, the capacitor can be omitted and a suitable interfacing method used. A typical tube is the widely available 931/931A.

Photomultiplier Circuit Diagram

Read More

Best Power Protection Circuit Diagram

This is the Best Power Protection Circuit Diagram for you. (Read Power supply Protection Circuit Diagram ) To safeguard portable, emergency power repeaters from reverse or excessive voltage, Dl prevents incorrect polarity damage, and zener voltage determines the maximum voltage that will reach the rest of the circuitry. Use fast blowing fuse rated greater than the SCR current rating.

Read: Over voltage Protection Circuit Diagram

Best Power Protection Circuit Diagram

Read More

Build a Long Line Ir Drop Voltage Recovery Circuit Diagram

How to Build a Long Line Ir Drop Voltage Recovery Circuit Diagram? This Simple Long Line Ir Drop Voltage Recovery Circuit Diagram provides a unique solution to a common system-level power distribution problem: When the supply voltage to a remote board must traverse a long cable, the voltage at the end of the line sometimes drops to unacceptable levels. 

This + 5-V/ + 5-V converter addresses this by taking the reduced voltage at the end of the supply line and boosting it back to + 5 V. This can be especially useful in remote display devices, such as some point-of-sale (POS) terminals, where several meters of cable could separate the terminal from the readout.

Long Line Ir Drop Voltage Recovery Circuit Diagram

Read More

Simple Bilateral Current Source Circuit Diagram

Hi Friends ! I am sorry for don't update i post because i am busy few days. OK to day share with you Simple Bilateral Current Source Circuit Diagram This circuit uses a CA3193 precision op amp to deliver a current independent of variations in RL. 

With RI set equal to R3, and R2 approximately equal to R4 + R5, the output current, h. is: VlN (R4)/(R3) (R5). 500-I`A load current is constant for load values from 0 to 3ohm.

Simple Bilateral Current Source Circuit Diagram

Read More

Build a Inexpensive Isolation Transformer Circuit Diagram

Build a Inexpensive Isolation Transformer Impromptus Setup Circuit Diagram. Using two 12-V filament or power transformers, an impromptu isolation transformer can be made for low-power (under 50 W) use in testing or servicing. SOI is an ordinary, duplex ac recept-able. Use heavy-wire connections between the 12-V windings because several amperes can flow.

Inexpensive Isolation Transformer Circuit Diagram

Read More

1 Zener Precise Limiter Circuit Diagram

A limiter 1 Zener Precise Limiter Circuit Diagram that requires matched zener diodes can instead use one zener with a full-wave diode bridge. The circuit`s two limits are nearly equal when determined by the same zener—only two pairs of forward diodes need to be matched. For best results, an integrated quad of diodes can be used. But, after testing the circuit, four single controlled-drop diodes and four ordinary diodes gave about the same accuracy (better than 0.5%). 

 1 Zener Precise Limiter Circuit Diagram

Because the limiting level can be adjusted, zener tolerance can be adjusted out. Gain stability can be optimized by connecting the inverting input to the first op amp to the output of the second to make the circuit inherently unity-gain. 

The zener voltage must be increased to 8.2 V to compensate for the two diode drops. Placing small capacitors across the resistors in the loop stabilized the circuit adequately and response is orders of magnitude faster than conventional circuits. Moreover, it`s limited primarily by the op amp`s slew rate.

Read More

Memory Save on Power down Circuit Diagram

Memory Save on Power down Circuit Diagram. The auxiliary output powers the memory, while the main output powers the system and is connected to the memory store pin. When power goes down, the main output goes low, commanding the memory to store. The auxiliary output then drops out.

Memory Save on Power down Circuit Diagram

/

Read More

High-Voltage Pulse Supply Circuit Diagram

This high-voltage pulse supply will generate pulses up to 30 kV. Ql and Q2 form a multivibrator in conjunction with peripheral components Rl through R6 and CI, C2, C3, C5, C6, and D2. R9 adjusts the pulse repetition rate. R2 should be selected to limit the maximum repetition rate to 20 Hz. II is a type 1156 lamp used as a current limiter. 

R9 can be left out and R2 selected to produce a fixed rate, if desired. Try about 1 as a start. Q3 serves as a power amplifier and switch to drive Tl (an automotive ignition coil). NE1 is used as a pulse indicator and indicates circuit operation. Because this circuit can develop up to 30 kV, suitable construction techniques and safety precautions should be observed.

High-Voltage Pulse Supply Circuit Diagram

Read More

Simple Bilateral Current Source Circuit Diagram

The Simple Bilateral Current Source Circuit Diagram will produce the current relationship to within 2% using 1% values for Rl through R5. This includes variations in Rl from 100 ohm to 2000 ohm. The use of large resistors for Rl through R4 minimizes the error due to Rl variations. The large resistors are possible because of the excellent input bias current performance of the OP-08,.

Simple Bilateral Current Source Circuit Diagram

Read More