If you are going to pull-up the switches to a 5v source then I think you can pull-up through a pair of resistors used as a voltage divider.
That way the input pins will not receive 5v. 3k and 2k resistors?
Tom
Search found 184 matches
- Thu Jul 15, 2021 3:00 pm
- Forum: Hardware
- Topic: 5V Dip switch
- Replies: 5
- Views: 4354
- Thu Jul 15, 2021 2:59 pm
- Forum: Hardware
- Topic: 5V Dip switch
- Replies: 5
- Views: 4354
Re: 5V Dip switch
If you are going to pull-up the switches to a 5v source then I think you can pull-up through a pair of resistors used as a voltage divider.
That way the input pins will not receive 5v. 3k and 2k resistors?
Tom
That way the input pins will not receive 5v. 3k and 2k resistors?
Tom
- Sat Jul 10, 2021 8:01 pm
- Forum: Hardware
- Topic: Can the ESP32 interupt and read port within 1us?
- Replies: 6
- Views: 5317
Re: Can the ESP32 interupt and read port within 1us?
You might not find the timing to be fast enough nor precise enough.
Consider 74ls373 to latch the value to be processed by software.
You may not want to use he but the timing it offers may be what is necessary.
I used that device to connect my coverage analysis hardware to an address bus.
Tom
Consider 74ls373 to latch the value to be processed by software.
You may not want to use he but the timing it offers may be what is necessary.
I used that device to connect my coverage analysis hardware to an address bus.
Tom
- Wed Jun 30, 2021 12:56 am
- Forum: ESP32 Arduino
- Topic: Reading analog values from a light sensor
- Replies: 2
- Views: 3193
- Sat Jun 19, 2021 4:46 pm
- Forum: Hardware
- Topic: High Voltage Ripple across ESP32
- Replies: 7
- Views: 5599
Re: High Voltage Ripple across ESP32
Please post your circuit diagram with part#s
- Wed Jun 09, 2021 7:55 pm
- Forum: General Discussion
- Topic: FFT - iFFT
- Replies: 3
- Views: 3775
Re: FFT - iFFT
Where have you looked? What did you find? (Google.com ?)
Tom
Tom
- Fri Jun 04, 2021 4:07 pm
- Forum: ESP32 Arduino
- Topic: Bluetooth Serial to Serial and iPhone
- Replies: 4
- Views: 11692
Re: Bluetooth Serial to Serial and iPhone
Do you mean "with blue tooth" or more generally that includes: wifi, usb, sound/ir/... i/o, gpio,wired,???
- Tue Jun 01, 2021 12:54 am
- Forum: Hardware
- Topic: Optimizing ESP32 WROOM-E Devkit Power Supply
- Replies: 4
- Views: 4128
- Sat May 15, 2021 2:57 pm
- Forum: ESP-IDF
- Topic: Simplest way to get readings from a button ?
- Replies: 3
- Views: 3213
Re: Simplest way to get readings from a button ?
https://learn.adafruit.com/micropython-hardware-digital-i-slash-o/digital-inputs 1) i recommend a pull-up on that pin or enable internal pullup: that way it is high or low 2) you will experience bounce and i think you will need to debounce the value Take a look at what adafruit has written for more....
- Sat May 15, 2021 12:28 am
- Forum: ESP-IDF
- Topic: Simplest way to get readings from a button ?
- Replies: 3
- Views: 3213
Re: Simplest way to get readings from a button ?
(1)Please post the pin numbers and (2) the circuit.
(3) How will you handle bounce?
(4)Maybe a code snip too
Tom
(3) How will you handle bounce?
(4)Maybe a code snip too
Tom