ElectronicNoobBlog

This soldering is not a proper way – terminal should be crimped, but i don’t have crimping tool for that size so i use this solder pot as work around!.

2000W inverter in ideal condition at 12V should take about 2000W/12V = 166A but to be safe, have low voltage drop and make sure it will work at 10V (2000W/10V = 200A)  + efficiency i decide to use 35mm2 copper cable.

The cheapest cable I found was a “welding negative ground cable” it was much more cheaper than cable dedicated to car audio amplifiers 🙂

Just make sure to mark red “positive end” 🙂

In my opinion it’s better to use hotair because You won’t touch ec5 body so You won’t left any solder left on sides – if You left then You will have trouble fitting conductor element into plastic case and need to use lot of force!!

1. Strip wire
2. Apply little bit of flux then add solder onto wire
3. using hotair heat ec5 pin and fill solder into hole (about half of hole)
4. fit wire while heating, wait couple of seconds then remove heat source
5. cold down and apply heat shrink tube
6. fit pin into plastic case using flat screwdriver
7. BEFORE STRIPPING ANOTHER WIRE MAKE SURE FIRST ONE IS FITTED INSIDE PLASTIC (or insulated) TO PREVENT ACCIDENTAL SHORT!!

Here pictures of that operation:

I’v got myself a TRI PRC 152 replica and i’m trying to put real military issued u-283/u connector, but i have to figure out what kind od PCB connector is used between TRI board and that connector.

The answer is: PicoBlade Molex Mini Micro JST 5pin 1.25mm

and could be bought without any problems on RC stores.

Here are some pictures.

From couple of months my hotair station start loosing suction power (and hotair airflow) and yesterday it stop working what was very dangerous because hotair heating element got red hot.

I started repair from checking “pump” module, but after checking outtake hose i found good airflow.  – most expensive part is working fine.

I found clog in airflow-meter showed on pictures caused by “flux”.

I fill airflow-meter with isopropyl alcohol overnight and next day all flux was dissolved, just rinse with more isopropyl alcohol and station working like charm 🙂

Very simple but useful fix, recommend check Your station and clean before it clog.

Couple months ago i had problem with SHARP LCD TV LC-32DH66E  that won’t turn on.

Symptoms: power up was slow, and getting slower over time until stop won’t turn on (green led)

TV have inside build in self-test that should show source of problem by blinking led in pattern described in service manual.

Unlucky problem is, failed capacitor don’t trigger this error warning.

Fix is very simple, replace showed capacitor – i decide to use other form factor so hope it won’t come back again.

6800pF 6.8nF

To access capacitor You have flip board back, it’s under PSU control IC.

Originally it have BR2032 battery with spot welded tabs – it’s quite hard to get in normal price so i have use “glue wire” to stick tabs onto battery.

Do not use soldering iron – because heat will damage battery.

If You don’t have spot welder – glue wire – is great for low current application – like in this scenario!

Couple months ago i got myself used AKG T912 headphones.  They can be used with regular battery or rechargeable.

Question is how whey prevent from recharge a single use battery when someone stuff it inside.

Answer is a third contact for recharge touching body of battery.

To be able use rechargeable battery, it need to have striped part of battery body to allow third pin contact – and then be recharge.

So if You fit rechargeable battery inside AKG T912 and they not charge – check for contact to body.

On pictures bellow You can see how it works.