verticalsoli.blogg.se - Raspberry pi as timer

Raspberry pi as timer how to#
Raspberry pi as timer update#
Raspberry pi as timer full#
Raspberry pi as timer portable#

Optional: 3D print a case for your hand washing timer

Set of jumper wires (M-to-F, M-to-M, and F-to-F) (opens in new tab).

Raspberry pi as timer portable#

Portable speaker with 3.5mm Aux Audio Jack (opens in new tab).

3.5mm male-to-male audio cable (opens in new tab).

Small screwdriver to adjust contrast of the LCD screen.

16x2 LCD screen with I2C backpack (opens in new tab).

Power supply/Keyboard/Mouse/Monitor/HDMI Cable (for your Raspberry Pi).

Raspberry Pi 3B (opens in new tab) or newer (3B+,3A+, or 4).

What You’ll Need to Build a Hand Washing Timer

In Part 4, we pull it all together by triggering the music and the countdown display with the ultrasonic sensor.

Raspberry pi as timer how to#

In Part 3, we add the ultrasonic sensor and learn how to measure distance.

Part 2 is all about adding a 16X2 LCD screen and adjusting contrast. In Part 1, you’ll learn how to connect your Raspberry Pi to an external speaker and play music clips via VLC through a Python script. This should be an interesting week.This is a four part tutorial. Honestly, once I gain confidence from completing the minimum requirement, the additional functionality and nice to have should follow up quite nicely. Additional Desired Functionality: monitoring flows and debris build up.

Raspberry pi as timer update#

Minimum Requirement: Update timer to have remote control to turn pump power on or off.

Using a relay, we could remotely chose lighting patterns as well as on/off state. Additionally, Multicolor LED lights are now available (expensive) and can be programmed for variable light displays (white, rainbow, different patterns) depending upon the on/off combinations at the switch. The precision window is rather large.Īlso, I like your idea for a smaller solid state relay for the pool light. My measurement concerns are for reliability and safety. Keeping things isolated is definitely the way I want to go. Also, I have manually flipped off this the circuit for this project.) So is that 20 amps or 2x20 amps = 40? I have always gone by what is marked. It is marked as 20 amps going to the pool but does take two punchouts. The circuit breaker is wired in the house. Sounds like a fun project, be safe and have fun With the WIFI adapter suggested above, all this could be controlled remotely and is limited by your imaginationītw, a smaller powered solid state relay could also be used to control the pool light you mention. There are plenty of circuits for driving a small 2 or 4 line LCD display with a PI so just google that for detailsĪll that's left is software and interfacing the analog front he sensor to the PI and again there are plenty of examples for that too.

Now of course being able to measure the current you could drop the voltage sensor as you will detect the current and this will indicate the motor should be running and also provide the current to the load either way isolated and safe.(Adjust R1 to suit 110V if needed)įor measuring the current I would start with something like this (Keeping with the isolated system for safety theme It could drive an interrupt or you could simply put a diode and rc network to smooth out the output to a logic level and simply have a low high signal. It can be driven from anything that can power an LED.ĭetecting the motor running is a little trickier, you could assume it is on based on the fact your controlling the relay or you can use a circuit like this

Raspberry pi as timer full#

You will be better off creating a new control system from scratchįirst BIG issue is the load your switching (The diagram indicates a 40A switch is currently used, I would not suggest underrating the replacement as the startup currents will be quite excessive even if the normal running will probably be under 15-30A, most relay boards from E-Bay are rated around 5AĪ solid state relay will allow easy interfacing, Full isolation and easy mounting see this as an example Solid State Relay SSR 60Da 60A 3 32VDC 24 380VAC | eBay (I selected one that was over rated for safety reasons, You still should have a circuit breaker of course which I assume is elsewhere as it is not visible in your pictures. As already suggested, I would not attempt to modify the existing timer device, it is just not worth the effort