The small QFP in the gold shielded section is probably a fully integrated analog radio chip and the other ICs are probably glue support circuitry like driving the speaker, charging the battery etc. The rest are just transistors and passives, for tuning and signal conditioning, nothing fancy. Its a really simple device.
@adityasinghrana37652 жыл бұрын
Your video is very helpfull to the learners. 🥰
@thomasanreise31072 жыл бұрын
What camera did you use for this video? It's great at capturing the detail of what's on the boards.
@tdcattech2 жыл бұрын
This is filmed on the Sony PXW-Z90. It's a great camera for this kind of work.
@Narwaro3 жыл бұрын
Transformer is adequate and there is sufficient isolation gaps (the part where no copper and no traces are) so no problems from a safety perspective. The rest is a very barebones integrated switch mode power supply, with sufficient output capacitance. No idea what the diode does on the other side. Its also single sided, this was really built down to a price.
@emrahozdemir50343 жыл бұрын
There is a tuning trimpot on the backside of mainboard which seems by the time 5:24 close to your thump finger. What does it do ??
@spinnerinthebubbleCT45435 жыл бұрын
I did notice a tuning pot on the backside of the main walkie talkie board, in the corner.
@keeancorrigan95102 жыл бұрын
Where is the actual receiver on the radio?
@nickmo4395 жыл бұрын
Charger looks OKish, looks like it has a dedicated li-ion charger chip, transformer for galvanic isolation.
@nickmo4395 жыл бұрын
Li-ion battery has a protection circuit, to my surprise))) radio is actually not bad.
@tdcattech5 жыл бұрын
Good to know. The build quality doesn't feel great so there's an assumption that the internals are also bad. It's good to hear that these safety issues have been addressed. Thank you.
@janhumpolicek83733 жыл бұрын
@@nickmo439 It does not have a Y1 class capacitor...
@desktopantec22903 жыл бұрын
its a single diode rectifier but it will do the job
@jackevans23864 жыл бұрын
Mains isolation of the charger takes place inside the transformer (Red and black square component) between its internal primary winding and low voltage secondary winding. This is a common arrangement. The mains wiring gauge is also adequate for the job as this is a very low current draw device. The more current drawn from the mains, the larger diameter the cable requirements become. The square black component labelled DB1 that you queried (next to the red and black mains wire solder pads) is a full wave bridge rectifier chip. This contains 4 power diodes for converting the AC mains to DC (direct current).
@tdcattech4 жыл бұрын
Thanks for the extra info!
@thomasanreise31072 жыл бұрын
We could tell it was low quality before you opened it up. (The 888 gave it away) j/k 😂 📻
@tdcattech2 жыл бұрын
🤣👍🏻
@mattharvey87122 ай бұрын
Bravo.....ok.....if it works don't question ......if u dont know then u dont know........the crystal is the magic.........get a temp gun with laser.......cheers
@amysuresh42924 жыл бұрын
cool good job
@paveljelinek77211 ай бұрын
Do not worry please 😂 the wire thickness is essential for the current so in this case the thickness is perf. ok since it won't suck i don't know.. 5A? Not a chance, since it's 220V and the output is (assuming) 10-15W, you count it.. less than sucking 0.1A from the wall and trust me the thickness is essential ONLY for Amps.. I've burned so many wires with 10V but never any wire with 220V. Reason? On lower voltages you easily suck more amps. If you'd suck 5A on 220V it's 220*5 over 1000W and on what you'd use 1000W (apart from the circ. saw)? Hope that answered th* oh and the stuff you were pointing on - most probably a transistor or voltage converter. And pardon me i was expecting you teach me anything new, not i teaching you😅. I could talk about amplifier circuitry but even though it's rather small, you can rest assure that it is there on the boards you showed us😊
@Shahidulislam-me5rx5 жыл бұрын
you seen to me bf 888s model walki talki inside. Pls
@tvhead5452 жыл бұрын
The inverter Is inside of the plug head That's why the wires are so thin