There are many simple electronic tricks and tips. To do Electronics in an easy way.
Although it is not the best. But I believe It is one step of learning. To increase electronic skills.
DIY AC Ammeter from multimeter
A general cheap analog multimeter will not have directly AC current ranges. But we are an Electric Appliance Repair, will always have this problem. For example: Measuring current of the electric appliances.
How to modify our meter?
We can modify the multimeter on AC 10V range to measure AC current 0-10A, use a 1 ohms resistors in pallial to lead of meter.
The resistor must withstand power (watts) is adequate, do not burn while measuring.
How to find the power of resistors.
The current of the circuit squared then multiply by 2, to the safety of its use. The current value is about 2A is a resistor value that is equal to 8 watts (2x2x2).
Add to that the resistor will measure current less than 10A. Which is the highest on the scale? If you want to measure more than this to reduce the resistance to the other.
While the measure has to be careful not to resistors in parallel, then dropped it. Otherwise, the meter will be damaged
How to use a Battery Tester
A basic electronic learning what is needed is a battery. Because I do not want him to use the AC-line, which could be dangerous.
So we store it in a lot of batteries.
Sometimes project electronic does not work well, may have caused Batteries broken, or worn out…should be replaced.
Normally, I tend to use the digital multimeter measure its voltage. But it’s convenient to have too many batteries.
Son and I saw the battery tester.
my son tried to use it, very convenient. He can make it easy to use the 1.5V battery of all size(AAA,AA,D and more) and the 9volts battery.
Battery Size :
1.5V , Good = 1.5V-1.28V ; Low power = 1.27V-1.15V ; Replace = Before = 1.15V
9V , Good = 9V-7.8V ; Low power = 7.7V-6V ; Replace = Before = 6V
If friends interested to buy it, you may like it same us.
DIY Make Solderless Flexible Breadboard Jumper Wires
DIY Make Solderless Flexible Breadboard Jumper Wires
A jumper wires in the experiment electronic circuits labs on Breadboard is indispensable. Normally we can buy them from general electronic store. Which is cheaper as amazon.com
Solderless Flexible Breadboard Jumper Wires M/M 100 pcs at www.amazon.com
Now, I will tech my son to make them before. To apply more thing to make tools or projects for save and DIY life.
We have fully devices
He is happy his job and make microcontroller project so well.
How to fix unclear the 7 segments led display
I’ve bought cheap digital frequency counter kits. It works great, can measure frequency up to 1GHZ in 19$ only. It uses 8 the LED 7 segment display. But it’s a little brighter so cannot clearly read the value.
How to make easy
This films, He request the car store near the house. Select the intensity level of about 60%.
First of all,
Then, Apply the films on the LED display
This is a simple tip that my son uses it. We do not need to modify it in the circuit. We can do it, good luck.
How to build the PCB by yourself
Creating a PCB is difficult. If you want to create your own PCB.
I find good information on various websites. For the benefit of friends.
This week, I collaborated with Xander to show you how to make your own printed circuit boards (PCBs) using a laserjet printer.
We should use IRF540N HEXFET Power MOSFET
An IRF540N is HEXFET Power MOSFET that I like to use in many projects. It is very Fast Switching than general transistor.
When I compare it with a transistors that I like to use is a TIP41. It have IC ( collector current) about 2A and VCE( collector-emitter voltage) about 40V only.
You can buy the IRF540N on amazon. It is N-channel that same way as shape NPN transistor TO-220 package. But they have Drain current maximum about 27A-33A and Vdss (drain -source voltage) about 100V.
Another advantage that I like it, works with a voltage. High input impedance therefore very sensitive. So we can be parallel directly, D to D, S to S and G to G. By we do not need to increase current to G.
Thus,If the price of of similar We should use Mosfet better.
Preliminary Technical specification.
– Advanced Process Technology
– Ultra Low On-Resistance
– Dynamic dv/dt Rating
– 175°C Operating Temperature
– Fully Avalanche Rated
I like the use of the brand International Rectifier durability due And for good reason.
More electronic projects using it worked great!
Simple resistive load
This is simple resistive load,Sometimes we need to use a resistors that without capacitance or inductance. We always use the carbon resistors. But some working to need the resistor that has also many high power. Which we cannot use the carbon resistor because it has maximum power about 2 watts only.
Normally, performance testing of amplifiers need to apply low resistance load and not affect the frequency. That is pure resistance requirements and The normally power amplifiers have also have high power. (Several hundred watts)
Alternative way is to change the resistor into the wire wound model. This resistor tolerance is very high. Because structure is a wire with a high resistance on the ceramic core. The problem is the inductance hidden inside. Which is caused by winding wire is coiled itself.
Figure 1 Simple resistive load
If as the DC circuit this lower inductance, no problem. But for working with high-frequency circuit will result in a lot.
The solution is connects the circuit as Figure 1. The current flow in resistor will opposite and cancel out. However, the total resistance has been reduced from the original.
Assuming the value of R, but was divided into two parts. Each section is equal to R / 2 and when the two parts are connected in parallel and be left with impedance R / 4.
This resistor can connects to point out the resistor is (tap). Which currently may be hard to find. But there is another way Using conventional 2-wire resistor with a resistance equal to the parallel instead. But do not forget to consider the resistance forces and the resistance of the circuit is required.
Make Lamp as power load
We like to test the functionality of a high current power supply by simple power load. It is 12V lamp 50 watts. But it had a high temperature. Require a docking station proper on long time trials.
We use Incandescent motorcycle head light bulbs 12V 25W/25W without a head light socket
The structure inside light bulb has two filaments for the high beam and low beam filaments are soldered two parallel, it would have a combined 50 watts as Figure 3.
It is technically simple electronic If you are experiencing similar problems. Get lucky.
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