Izbornik Zatvoriti

Enabling two color LED on Sonoff Basic R2 Smart Home Switch

Skraćena veza: https://pedja.supurovic.net/veza/10649

I like Sonoff Basic R2 Smart Home Switch as it is low priced but very functional multipurpose device. Most of all, it contains ESP8266 chipset which means it is easy to replace original firmware with custom one. I use ESPHome firmware but Tasmota is also good.

sonoff-basic-schematicBy looking at the board of this little device I found out that it contains two-colored LED. Actually, two LED-s are in one package with three contact legs. Green LED is used in factory assembly, and it is connected to GPIO13. The second LED is red colored and not used. It is actually meant to be used by optional RF module. […]
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Baofeng UV-B5 / UV-B6 enhancing modulation

Skraćena veza: https://pedja.supurovic.net/veza/8998

One of the issues of UV-B5 is that it has shallow modulation when passing through some repeater systems. That is common issue with Chinese radios. R4HV posted on YouTube explanation how to fix that. As his post is in Russian language it does not popup easily on search sites.

However, modulation fix is rather simple: one resistor has to be removed and new connection made using 150 K resistor . That is all. Check his video.

 

Here are pictures before and after the modification:

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How to use Baofeng UV-B5 flash light switch for LCD background light

Skraćena veza: https://pedja.supurovic.net/veza/7318

Soon after I got him this nice walkie-talkie, my brother Nenad (YU1TTL) quickly found out how to overcome missing feature of UV-B5: LCD background light is turned on only when some keys are pressed and stays on far a very short time. He managed to use flash switch which is used in UV-B6 version but in UV-B5 has no function.

He decided to put up instructions on my blog so others can benefit of this modification. So here it is:

How to use Baofeng UV-B5 flash light switch for LCD background light

by Nenad Supurović YU1TTL

These are instructions for disassembling Baofeng UV-B5 walkie-talkie and also how to modify it to enable the third (Flash light) button to switch the LCD and keyboard back-light on/off

Disassembling:

1. […]
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