Lets take apart this newish AA/AAA charger from IKEA and see if it worth the money!
Specs
Components
| Holtek HT46R004 | Cost-Effective A/D 8-Bit OTP MCU. The device is an 8-bit high performance RISC architecture microcontroller CPU Features Operating voltage: fSYS= 8MHz: 2.3V~5.5V Up to 0.5us instruction cycle with 8MHz system clock at VDD=5V Power down and wake-up functions to reduce power consumption Two oscillators: Internal high speed RC — HIRC Internal low speed RC — LIRC Fully integrated internal 8MHz oscillator requires no external components All instructions executed in one or two instruction cycles Table read instruction 63 powerful instructions 4-level subroutine nesting Bit manipulation instruction Peripheral Features Program Memory: 2Kx14 RAM Data Memory: 96×8 Watchdog Timer function Up to 18 bidirectional I/O lines 8 channel 12-bit ADC 1 channel 8-bit PWM External interrupt pin shared with I/O pin One 8-bit programmable Timer/Event Counter with overflow interrupt and prescaler Low voltage reset function Package types: 16-pin NSOP and 20-pin SOP Programmable Frequency Divider — PFD |
| LMV324 | quad low-voltage (2.7 V to 5.5 V) operational amplifiers with rail-to-rail output swing |
| 8205A | Dual N-Channel MOSFET https://datasheet.lcsc.com/szlcsc/2004231933_CJ-CJL8205A_C504156.pdf |
| DP2353 | Highly Integrated Offline Current Mode PWM Power Switch ( documentation below ) |
| EL817 | Everlight. Transistor Output Optocoupler |
| NTC Thermistor | |
| 7550 | 5V regulator |
Video
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