The Best 2021 Autel OBD II automotive diagnostic tool all system immobilizer

Autel is one of the world's leading providers of automotive intelligent diagnostics, inspection and TPMS (Tire Pressure Monitoring System) products and services.

Autel has been deeply involved in the global automotive intelligent diagnosis and testing field for more than ten years. e have now built three product lines including automotive diagnostic products,TPMS series for automotive tire pressure monitoring systems and ADAS series for automotive intelligent assisted driving systems.

Autel products are mainly sold to more than 50 countries and regions such as the United States, Germany, the United Kingdom, and Australia. Autel is one of the world's leading providers of automotive intelligent diagnostics, inspection and TPMS (Tire Pressure Monitoring System) products and services.

We picks The Best Autel products Car Diagnostic Scan Tool

A Strobe flasher for bike indicator

Simple circuitry allows the project to be built at low cost in a lightweight, compact

package that can be secured to the bicycle or the rider's belt. 

The light from this circuit uses a xenon tube to generate a bright flash that can be

seen from a great distance - but is not intense enough to destroy a driver's night vision.

Circuit 

Parts Lists

Build your own this low cost analog capacitance meter

When a capacitor is connected to a constant-voltage source through a resistor, the charge on the capacitor increases exponentially. If the source supplies a constant current, however the charge on the capacitor increases linearly. This linear charging principle is used here in the design of capacitance meter which will measure values outside the range of most such meters. 

By using a constant-current source, the meter determines the time it takes to match the charge on the unknown capacitor to a known reference voltage. The meter has five full scale range o 1, 10, 100, 1000, and 10,000 uF.on the 1-uF scale , values as small as 0.01 uF can be read easily.

The Circuit 

 

Power Supply

Parts List

PCB Layout

Component Layout 

Prototype:

source :  Electronic Experimenters Handbook 1980 edition 

Best TP Link Archer Wireless Router Series

We pick 10 best TP-Link Archer Series . TP-Link Technologies Co., Ltd., is a Chinese manufacturer of computer networking products based in Shenzhen, Guangdong, China.

1.  TP-Link AC1750 Smart WiFi Router (Archer A7)

Dual Band Gigabit Wireless Internet Router for Home, it Works with Alexa, VPN Server, Parental Control, QoS

With parental controls and guest access.Keep your family safe and devices secure with advanced WPA/WPA2 wireless encryption.

Delivers Up to 2,500 sq.ft. exceptional WiFi coverage  throughout your home as three high-gain antennas and strong amplifiers connect every device—from the living room to the backyard. Check It Out

10 Best Professional Automotive Diagnostic Scanner 2021 By Brand

Whether you are a professional maintenance staff or not, it can provide professional technic support for your car. 

As a professional scan tool , it is able to deal with pretty much every auto repair scenario you can think of. 

Don’t worry, even a greenhand will feel it easy and convenient to use.

All Controlled Modules Scanning and Problem Diagnostics, such as Engine System, Airbags System, ABS System, 

Transmission System, Brake System, Alarm System, Keyless Entry System, TPMS System, Steering System, Wheel 

System, Fuel System, etc. It only takes a few minutes to finish full scanning of your vehicle and do a fast 

diagnosis and maintenance via reading/clearing codes, viewing freeze frame and graphing live data.

We picks 10 Best automotive scanner that compatible with almost all cars sold worldwide. 

10 Best Professional Automotive Diagnostic Scanner 2021 By Brand

White LED Lamp Circuit

Make  this  solid-state pocket torch using a few of these white LEDs. The simplest approach is naturally to use a separate series resistor for each LED, which has an operating voltage of round 3.5 V at 20 mA. Depending on the value of the supply voltage, quite a bit of power will be lost in the resistors. 

The converter shown here generates a voltage that is high enough to allow ten LEDs to be connected in series. In addition this converter supplies a constant current instead of a constant voltage. 

A resistor in series with the LEDs produces a voltage drop that depends on the current through the LEDs. This voltage is compared inside the IC to a 1.25 V reference value, and the current is held constant at 18.4 mA ( 1.25V devided by 68Ohm)

The IC used is one of a series of National Semiconductor 'simple switchers'. The value of the inductor is not critical; it can vary by plus or minus 50 percent. 220 uH coil at 3.5 A is good choice. Almost any type of Schottky diode can also be used, as long as it can handle at least 1 A at 50 V. The zener diodes are not actually necessary but they are added to protect the IC. If the LED chain is opened during experiments, the voltage can rise to a value that the IC will not appreciate.

Circuit

PCB Layout

Component Layout

Parts Lists

source ; Elektor 

Free Energy : Centrifugal dynamic power generating system using a lever structure Patent

This patent of Centrifugal dynamic power generating system using a lever structure invented by Daniel Paul Gorney. 

The free energy concept is the system/machine that operate perpetual motion indefinitely and independently without any other source of fuel, electricity, or any other renewable energy source other than gravity energy.

The free energy magnitude is over unity concept. the free energy result must bigger than energy for running the system/machine itself.

                                                                                                                                       

image courtesy google.com and Daniel Paul Gorney

DC Millivoltmeter with IC OP AMP 741

The Design of this DC Millivoltmeter presented here is a sensitive dc. electronic meter of several Megaohms input resistance and covering range from 5 Volt f.s.d to 5 mV f.s.d. 

This D.C. voltmeter designed to be used with 1 mA meter movement, this unit can be used as a pre-amplifier for a conventional test meter when switched to its 1 mA range for 5 V range. The range of meters from 5V f.s.d ,0.5V, 50mV, and 5mV f.s.d are provided, with input several Mega Ohm.

Best Long range 990 miles hd 1080p outdoor amplified hdtv digital tv antenna long range vhf uhf ?

Is it possible to get 990 miles or 1500 km  amplified outdoor antenna  from Broadcast TV stations ? The answers it is depends , if the broadcast stations have many repeaters it is possible for you to received from the long range TV stations , but you don't need 990 miles amplified antenna for this. And also there is no antenna in the market with 990 miles amplified Antennas with a gain of 990 miles are not available in the market and are very difficult to manufactured.

The antenna in the range 50-300 miles it is enough  with reasonable price, more gain in dB and more elements.  because the TV stations have repeaters.

So the choice is an antenna to receive long distances between 50-300 miles plus an amplifier.

I have selected 5 of the best antennas and amplifiers or boosters for this purpose, so can be your reference before you buy it.

The Best Long Range Indoor and Outdoor Omnidirectional HDTV Antenna

There are hundreds of TV Antenna  on the market — so how do you know which one to buy with good quality for long range distance home or house from TV stations? Antenna Handbook with decades of experience have spent months reviewing hundreds of Antennas to shortcut your shopping.

We picks for you 10 Best Outdoor TV Antenna 360° Omni-Directional Reception Long 100+ Miles Range.

Before you buy, we already summarize for you , the Omnidirectional TV Antenna criteria for Long range reception .

1.  360° coverage Omnidirectional  in design 

2.  Signal Booster included, for Amplify and receiving small TV signal

3. 4G LTE Filter included 

Best Omnidirectional TV antenna for Budget with price below $50

1. ANTOP Outdoor 360° Omnidirectional HDTV Antenna

Receive signal from all directions, no need to rotate, no need the remote control as traditional huge outdoor antennas required to change the receiving direction for better signal. The receiving ability and materials are far better than Yagi antennas.
- Smartpass Amplifier Included

- 4G LTE Filter Included 

- Reception Range : 50-65 miles 

2. SLx 360° Digidome Digital HDTV Antenna

The unique omni-directional design of the Digidome digital TV antenna enables it to receive all locally available TV signals without the need for a rotating-mount. Capable of receiving VHF and UHF frequencies, it is the perfect digital antenna for Smart TV, HDTV and Analog.

- Signal Booster Included 

- Reception Range : 150 - 300 miles

- LTE800 Filter shields against interference from 4G mobile signals

ust because TV Antennas are functional items doesn't mean they can't look good! With its sleek look the SLx Digidome brings all the functionality of a larger outdoor antenna in a compact and modern design that won't clutter your roof-top or attic.

3.2021 Strongest Amplified Digital HDTV Antenna

Say NO to cable TV and Huge Bills! Enjoy hundreds of FREE TOP-RATED HDTV programming forever with 2021 Strongest Amplified Digital HDTV Antenna; including ABC, CBS, NBC, PBS, Fox, Univision and more  with Range Reception : 150 miles Up to 320 miles and Built in Amplified. This durable construction eliminates signal interference 

Powerful TV antenna with built-in amplifier can be used RV, camping, outdoor, indoor,and the new technology of cellular and FM signals can make the picture clearer.

With new type amplifier signal booster with built-in smart ic chip to picks up signals Up To 320 miles which provide added range and maximum signal reception for more channels even you are far away form broadcast towers

Best Omnidirectional TV Antenna for Medium Price $50 - $100

4. 1byone Outdoor TV Antenna 360° Omni-Directional

Receive UHF/VHF signals from all directions while providing clear 4K pictures, no need to rotate, no need the remote control as traditional huge outdoor antennas. 1byone Outdoor TV Antenna 360° Omni-Directional have exclusive Smart pass Amplifier technology allows switch On & Off to get Long & Short Range Reception

Allows you to boost signal right at the antenna, and removes interference and channel loss caused by 4G mobiles phone signals, making up for the signal loss from long cable runs and splitters. According to the signal range, the amplifier enlarges suitable multiples to ensure the coverage extension.

5. 1byone 360° Omni-Directional Reception Amplified Outdoor TV Antenna

Up To 150+ Miles Range And Watch What You Want - This 150 mile range hdtv antennae enables you to watch local broadcast channels with high definition for FREE. resulting in clearer picture, low noise and access to more free broadcast TV signals.

Enjoy Clear HD Channels - This best quality model can receive free full HD channels like ABC, CBS, NBC, Fox and so much more. Receive your favorite channels without a monthly bill! Enjoy local news, weather, sitcoms, kids and sports programming with no monthly contract and save around USD 1020  annually.

Tips Best Indoor tv antenna for Basement Apartment

As we know apartment building consist of concrete , metal beams and blocking propagation of electromagnetic field from outside the building, such as cellular signal and  TV signal .

And how to solve this problem ? By optimizing and placing the antenna in such a way and use the amplified Booster for pick up small signal and amplified for better reception.

I give one example, use Philips Modern Loop Rabbit Ears Indoor TV Antenna and Booster GE Indoor TV Amplifier 

If your room windows facing out, place the antenna here and connect to booster/amplifier than connect to your TV, and scan the channel after installation. Use Indoor TV with high gain between 15 - 22 dBi , and use booster with high gain for better reception.

Comparison Long Range tv antenna for rural areas : GE Outdoor TV Antenna VS Antennas Direct Outdoor Antenna

Rural areas consist of savanna , mountain, trees, with hilly land , far away from Broadcasting TV Tower and need Antenna TV Outdoor/Indoor with High Gain for reach the signal from the TV transmitting tower.

With todays many cellular tower in the rural areas, and affect TV signal reception , we also need cellular filter 3G/4G/5G.

For this purpose I will compare GE Outdoor TV Antenna VS Antennas Direct Outdoor Antenna with keys criteria for you as reference.

If you live in USA and Canada please check your coverage in FCC website. 

Check Coverage

Use dtv reception maps   to check for the DTV signals that are available at your location. Enter your address in the box at dtv reception maps and click Go! The DTV coverage map will list all stations in your area.

Sometimes stations change the frequency on which they broadcast — the channel a viewer selects to watch a particular station remains the same but the frequency that the viewer’s television finds the station on changes -- requiring viewers who use an over-the-air antenna to rescan their tuners to locate the station's new signal.

DTVmaps is a tools to help you decided what the right antenna for your TV, based on coverage distance. 

Actual signal strength may vary based on a variety of factors, including, but not limited to, building construction, neighboring buildings and trees, weather, and specific reception hardware. Your signal strength may be significantly lower in extremely hilly areas.

Comparison chart

Below the chart comparison  is a key to explain each of the measurements and what to compare depending on your needs.

The keys factor you need to know for pick the Antenna Outdoor are :

Brand 

General Electric Company (GE) is an American multinational conglomerate incorporated in New York State and headquartered in Boston. As recently as 2018, the company operated through the following segments: aviation, power, renewable energy, digital industry, additive manufacturing, locomotives, and venture capital and finance . One of GE products are home appliances included TV Antenna.

Antennas Direct is An Antenna company in 16388 Westwoods Business Park Ellisville, MO 63021, whose acquired Mohu Antenna in 2003, have more than 100 employees, and produce Innovative HDTV Antennas, Broadcast Television, Digital Antennas, TV Antennas, OTA Television, Television Accessories

Different manufactures produce Outdoor Antenna which meet today’s good reception standards antenna. The chart shows the criteria for you considered to picks the antenna 

Model

The 2 Antenna model name shown are different, GE model with J mount and designed for reduce signal dropouts and for UHF, VHF, HDTV reception, claims by customer to have power reception around 16-20 dB  can installed both Outdoor, Attic and Indoor .

While Antenna Direct model with 8 element bowtie, also can installed in Outdoor, Attic, and Indoor and have around 17.4 dB power reception, it is strong enough to receive long distance broadcast TV Tower.

Filter

Lte filter can remove interference from frequency bands (3G/4G） outside the TV band. It can improve the TV signal.

Passes range 80 to 800MHz,Blocked 800MHz above.4g filter removes noise for better picture. Antenna Filter - Cleaning unwanted RF signal out of digital antenna system effectively,Signal loss is 0.8dB or less.

Booster

Signal booster enhances any non-amplified antenna, delivering a clearer signal, more range, and more available channels; works with any passive/non-amplified antenna; antenna required for use with preamplifier.

This questions must apply before you buy the booster :

Are your home/house far away from TV Tower Stations and also have weak signal reception from Outdoor/Indoor Antenna ? If the Answers is Yes, than you should use Booster Antenna.

Range Max (in Miles)

Range Antenna for pick up TV signal influenced by Elements of Antenna and Gain , the more elements your antenna have, the more Gain of the Antenna, and more sensitive to pick signal from far away

Gain (in dBi)

As mention above, the more Gain the antenna have, the more good quality for antenna pick up signal.

If the antenna have Gain between 15-35db , it is good enough for receiving TV signal from long range area.

Band (Frequency in MHz)

Band frequency for Digital HDTV, VHF, and UHF band between 470-860 MHz , sometimes antenna manufacturing company also made antenna covering FM Band, between 45-860 MHz.

Price

Price will vary, you can get the cheapest antenna with price below USD 30 , or the expensive one with price more than USD 200, it is depends your need, as long as you have the good quality of antenna, with the good reception and your satisfied , the price will not be the issue.