Connecting 32 magnetic sensors Ask Question 0 I would like to build an organ pedal board and use Raspberry Pi as signal processor. The pedal board will have 32 inputs, one for each key. […]
keypad program
MCP23x08/mcp23x17 References
MCP23x08/mcp23x17 References AN1081 Title: Interfacing a 4×4 Matrix Keypad with an 8-Bit GPIO Expander -04/12/2007 Mike Curran https://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en529784 Description: This application note discusses interfacing a 4×4 matrix keypad with MCP23X08 8-Bit GPIO […]
keypad notes
AliExpress 4×4 Matrix 16 Keys 8pin output Button Keypad – US $0.58 https://fr.aliexpress.com/item/Smart-Electronics-8pin-4×4-4-4-Matrix-16-Keys-Button-Keypad-Keyboard-Breadboard-Module-Mcu-for/32488741954.html?spm=a2g0w.10010108.1000016.1.7ccf476frh2dOF&isOrigTitle=true
MCP3008 Sample Rate Notes
how can I get a fixed sampling rate of 1 ksps when interfacing MCP3008 (10 bit ADC) with raspberry pi using SPI? Ask Question 0 Whenever I take data from the MCP3008, […]
Rpi GPIO CCT
Rpi GPIO Cct
Arduino only low trig relay
RE: RELAY MODULE KY-019 5V Postby tlfong01 » 2018-Jun-22 Fri 11:04 pm tlfong01 wrote: ↑ 2018-Jun-22 Fri 3:11 pm Now I am connecting Vcc to 3.3V and check out the Vin turn-on-relay and Vin turn-off-relay points. Now […]
latchup discussion
Top tlfong01 Posts: 1312 Joined: 2018-Jun-02 Sat 9:43 pm Location: Hong Kong RE: RASPBERRY PI + RELAY GPIO DONT WORK Postby tlfong01 » 2019-Jan-29 Tue 2:07 pm PhatFil wrote: ↑ 2019-Jan-29 Tue 10:17 am the relay … looks like one […]
pnp relay latchup
RE: RASPBERRY PI + RELAY GPIO DONT WORK Postby tlfong01 » 2019-Jan-29 Tue 9:46 am Dam_Fr wrote: ↑ 2019-Jan-29 Tue 7:54 am I put PIN “0” or “1”, relay stay ON, … […]
Latch up discussion
RE: RASPBERRY PI + RELAY GPIO DONT WORK Postby tlfong01 » 2019-Feb-07 Thu 10:38 pm tlfong01 wrote: ↑ 2019-Jan-29 Tue 9:32 pm Dam_Fr wrote: ↑ 2019-Jan-29 Tue 4:24 pm I have some […]
tlfong01.blog 