What uC do you suggest to use for 100+kHz PWM MPPT? N.Winterbottom wrote:
Still struggling with the request for speed here, can we assume the PWM output is NOT being low-pass filtered. It's the only thing that makes any sense.
Yes...
Saturday, 25 September 2021 - 09:42
What uC do you suggest to use for 100+kHz PWM MPPT? Phyder wrote:
.. In best case I would put a 20MHz crystal on the device and use a 8-bit timer with no prescaler. That would give me 20000000 / 256 = 78,125 kHz PWM with 8-bit...
Friday, 24 September 2021 - 20:09
faking a POT 500ohm with a filter pwm? El Tangas wrote:
IMO, since the detection of the joystick current output is just a capacitor that charges until it triggers a comparator at a certain level, all that is needed is...
Tuesday, 21 September 2021 - 20:21
faking a POT 500ohm with a filter pwm? MarkThomas wrote:That's how I read it. The OP wants to talk to his GameThingy with an AVR.
Yes, in #16 the OP says : Yes I want the GamerPort to assume I'...
Monday, 20 September 2021 - 23:14
faking a POT 500ohm with a filter pwm? MarkThomas wrote:
SPI 100k PDIP pots are about $1 per channel.
I see Microchip have a 4 channel one for ~ $1.50, the MCP4352 series, which could suit, comes in...
Monday, 20 September 2021 - 05:59
faking a POT 500ohm with a filter pwm? MarkThomas wrote:
Can somebody tell me what the GamePort is expecting as input? A voltage, a resistance, a current????
See the link in #3
They use a RC monostable, where...
Monday, 20 September 2021 - 03:46
faking a POT 500ohm with a filter pwm?
S_K_U_N_X wrote:
What is your exact application here ?
Do you want to actually plug into a gameport like the link ?
Yes I want the GamerPort to assume I'...
Monday, 20 September 2021 - 01:36
faking a POT 500ohm with a filter pwm? S_K_U_N_X wrote:
Edit: Oh my mistake 100k ohms..
see "Resistive analogue inputs (joystick position)"
https://old.pinouts.ru/InputCabl...
My application is to fake how a...
Friday, 17 September 2021 - 23:28
NTC mostafa147 wrote:5d-7 ntc
5d-7 seems to be 5 ohms 2 amps, so it is really intended as inrush current limiting in power electronics.
ie Not a great choice...
Friday, 10 September 2021 - 04:54
Choosing next microcontroller family i14r10 wrote:
Also, I've been looking at Raspberry pi pico - 133MHz dual core processor, tons of features, about 5 $ cost. Those Atmegas now cost around 2-3 $. Seems RPi are now...
Friday, 27 August 2021 - 02:03
AVR DU gchapman wrote:
Who-me wrote:I wonder what top Baud and sustainable baud rates it can manage ? Might not know that until the preliminary datasheet arrives sometime after...
Tuesday, 24 August 2021 - 23:56
AVR DU gchapman wrote:
AVR DU Product Brief
– One USB 2.0 full-speed device(1)
• Optional internal 3.3V voltage regulator
• OSCHF oscillator can be tuned to the USB start-of-...
N.Winterbottom wrote: Still struggling with the request for speed here, can we assume the PWM output is NOT being low-pass filtered. It's the only thing that makes any sense. Yes...
Phyder wrote: .. In best case I would put a 20MHz crystal on the device and use a 8-bit timer with no prescaler. That would give me 20000000 / 256 = 78,125 kHz PWM with 8-bit...
El Tangas wrote: IMO, since the detection of the joystick current output is just a capacitor that charges until it triggers a comparator at a certain level, all that is needed is...
MarkThomas wrote:That's how I read it. The OP wants to talk to his GameThingy with an AVR. Yes, in #16 the OP says : Yes I want the GamerPort to assume I'...
MarkThomas wrote: SPI 100k PDIP pots are about $1 per channel. I see Microchip have a 4 channel one for ~ $1.50, the MCP4352 series, which could suit, comes in...
MarkThomas wrote: Can somebody tell me what the GamePort is expecting as input? A voltage, a resistance, a current???? See the link in #3 They use a RC monostable, where...
S_K_U_N_X wrote: What is your exact application here ? Do you want to actually plug into a gameport like the link ? Yes I want the GamerPort to assume I'...
S_K_U_N_X wrote: Edit: Oh my mistake 100k ohms.. see "Resistive analogue inputs (joystick position)" https://old.pinouts.ru/InputCabl... My application is to fake how a...
mostafa147 wrote:5d-7 ntc 5d-7 seems to be 5 ohms 2 amps, so it is really intended as inrush current limiting in power electronics. ie Not a great choice...
i14r10 wrote: Also, I've been looking at Raspberry pi pico - 133MHz dual core processor, tons of features, about 5 $ cost. Those Atmegas now cost around 2-3 $. Seems RPi are now...
gchapman wrote: Who-me wrote:I wonder what top Baud and sustainable baud rates it can manage ? Might not know that until the preliminary datasheet arrives sometime after...
gchapman wrote: AVR DU Product Brief – One USB 2.0 full-speed device(1) • Optional internal 3.3V voltage regulator • OSCHF oscillator can be tuned to the USB start-of-...
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