| Discussion Title | Created date |
|---|---|
|
Seeking suggestions for temperature switches I have an application where I'd like to turn a fan on and off based on a hardwired temperature. The ideal device would have three pins: Vcc, GND, and output, where... |
Friday, 13 November 2020 - 23:50 |
|
Odd array index behavior I'm having this problem in Arduino, but I don't get much help over on the arduino.cc forum, so I thought I'd try over here. After all, there IS an AVR in there () and I... |
Tuesday, 24 September 2019 - 22:07 |
|
Problem passing an array struct element to a function I'm having this problem in Arduino, but I posted on the arduino.cc forum and didn't get a reply, so I thought I'd try over here. After all, there IS an AVR in there ( ) and... |
Sunday, 22 September 2019 - 23:27 |
|
Why won' this light bulb turn on? So I have an MR16 halogen light bulb like this one, 12V 75W, resistive (no LED). I have a 12V, 10A power supply. The bulb won't light. I figure the bulb requires... |
Saturday, 31 August 2019 - 16:20 |
|
Fine tuning a crystal in code I’m thinking of making a clock (which would always be subject only to room temperature) using a 32.768 kHz xtal driving a counter. The xtal has 20 ppm frequency tolerance which I... |
Tuesday, 21 May 2019 - 05:52 |
|
Seeking easiest way to add Bluetooth to an embedded design I'd like to dip my toe into the Bluetooth pool by making a clock that is settable via BLE. I know it's overkill, but I'd like to keep the application as simple as possible... |
Tuesday, 14 May 2019 - 03:02 |
|
Is it OK to splice thermocouple wire? I have a metal part whose temperature I want to monitor with a K type thermocouple. This part screws into the machine it's a part of for periodic removal and reattachment.... |
Friday, 26 April 2019 - 02:38 |
|
How to cool a small amount of air? I have a project that requires me to cool about a cubic foot of air from room temp down to around 40 degrees F. There are several products on the market that might be able... |
Monday, 11 February 2019 - 21:24 |
|
Seeking battery performance data in ultra low-power (uW) applications I'm considering a design that would be activated by a capacitive touch switch. The switch circuitry would be the only thing drawing power most of the time at 34uA and 3V.... |
Wednesday, 23 January 2019 - 22:02 |
|
Simulating uint64_t I have an ATMega128A application where I need to shift a field of 12 1s through a 40-bit long number, one bit at a time. It seems to me the easiest way to do this would be to use... |
Thursday, 13 December 2018 - 14:37 |
|
Bench supply vs. chassis supply problem I'm building a system based on an ATMega128A. My board (which only draws about 25 mA) works fine when running off my bench supply's 5V. When I switch to the chassis... |
Wednesday, 12 December 2018 - 05:38 |
|
Selecting a zener diode for solenoid flyback suppression I'm low-side driving a 24V, 1.2A DC solenoid with a 30V MOSFET. I'd like to protect the MOSFET with a zener diode across the source and drain (cathode to drain, anode to source).... |
Wednesday, 14 November 2018 - 14:56 |