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.
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😊
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
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.
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.
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).
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.
Your video is very helpfull to the learners. 🥰
I did notice a tuning pot on the backside of the main walkie talkie board, in the corner.
What camera did you use for this video? It's great at capturing the detail of what's on the boards.
This is filmed on the Sony PXW-Z90. It's a great camera for this kind of work.
Where is the actual receiver on the radio?
its a single diode rectifier but it will do the job
cool good job
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😊
lol BAOFENG BF-888S clone
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
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.
Charger looks OKish, looks like it has a dedicated li-ion charger chip, transformer for galvanic isolation.
Li-ion battery has a protection circuit, to my surprise))) radio is actually not bad.
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.
@@nickmo439 It does not have a Y1 class capacitor...
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 ??
We could tell it was low quality before you opened it up. (The 888 gave it away) j/k 😂 📻
🤣👍🏻
you seen to me bf 888s model walki talki inside. Pls
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).
Thanks for the extra info!
The inverter Is inside of the plug head That's why the wires are so thin