Eval » Historie » Revision 14
Revision 13 (Maximilian Seesslen, 22.08.2023 16:48) → Revision 14/37 (Maximilian Seesslen, 23.08.2023 10:41)
h1. Eval
CANDis is quite silent.
CANBuz probably will have same issues. Need to test capacitors.
F=As/V
qalc 0,000022*3 = 0,000066 = 0,066mAs
Ich hab doch noch grosse
Is it the power regulator/LDO? What did i solder?
h2. Parts
* LM386; "DS":https://www.ti.com/lit/ds/symlink/lm386.pdf ; page 10
* LM4861 M; 1,39€
** can be driven @5V; not sure if V+ has to be 3v/2 or 5v/2 ?
** Shutdown: power output off on logic high
h2. Amp
"lm4871":https://www.ti.com/lit/ds/symlink/lm4871.pdf
h2. MCU
* STM32F042G4U6; UFQFPN28; 16KB; hab ich noch 17
* Get rid of an STM32F072 in order to have DAC?
* STM32G431KBU6
** SAI; FPU
** 5,87€
h2. DAC
* Maybe later; SAI would be more interesting. DAC for testing DMA.
* 44,100 Hz
* Would require SPI flash for recorded sound
* Adjustable volume
* Solderbridge for fallback
CANDis is quite silent.
CANBuz probably will have same issues. Need to test capacitors.
F=As/V
qalc 0,000022*3 = 0,000066 = 0,066mAs
Ich hab doch noch grosse
Is it the power regulator/LDO? What did i solder?
h2. Parts
* LM386; "DS":https://www.ti.com/lit/ds/symlink/lm386.pdf ; page 10
* LM4861 M; 1,39€
** can be driven @5V; not sure if V+ has to be 3v/2 or 5v/2 ?
** Shutdown: power output off on logic high
h2. Amp
"lm4871":https://www.ti.com/lit/ds/symlink/lm4871.pdf
h2. MCU
* STM32F042G4U6; UFQFPN28; 16KB; hab ich noch 17
* Get rid of an STM32F072 in order to have DAC?
* STM32G431KBU6
** SAI; FPU
** 5,87€
h2. DAC
* Maybe later; SAI would be more interesting. DAC for testing DMA.
* 44,100 Hz
* Would require SPI flash for recorded sound
* Adjustable volume
* Solderbridge for fallback