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This project is for sale, includes KiCad (schematic, PCB & BOM) and Arduino code.
For questions and details please contact via my Tindie store!
Raspberry Pi Automatic ON/OFF V3.0 SMD
Automatic turn…
This project is for sale, includes KiCad (schematic, PCB & BOM) and Arduino code.
For questions and details please contact via my Tindie store!
Raspberry Pi Automatic ON/OFF V3.0 SMD
Automatic turn ON and turn OFF (safe shutdown) Raspberry Pi with ignition key.
March 2024:
- Due to lack of time, the module is no longer available.
Thank you for understanding!
NEWS in 3.0 SMD version:
- New PCB design
- New DC/DC step down converter
NEWS in 2.1 SMD version:
- The PCB is now in SMD design.
NEWS in 2.1 version:
On the HARDWARE side:
1. On the 12V constant power supply line use RBO08/RBO40;
reversed battery protection,
clamping against negative overvoltages,
transil function for overvoltage protection,
SUITABLE FOR AUTOPROTECTED ALTERNATOR ENVIRONMENT
2. On the ACC line use opto-coupler and TVS diode
3. For 5V power (module internal power) use LM2931 (Designed originally for automotive applications);
Reverse Battery Protection or 2 battery jumps
60V Load Dump Protection power systems,
−50V Reverse Transient Protection circuits,
Internal Thermal Overload Protection the LM2931-N and all regulated circuitry are protected
4. Double USB A output connector (5V)
On the SOFTWARE side:
allow user to programming custom time values via USB/TTL serial adapter:
timeON,
timeBOOT,
timeOFF,
timeSHUTDOWN
What is it?
There are some things that we need to solve if we want to use a Raspberry Pi in a car, boat, or something similar.
First is a power supply. In a car we have 12V and we need 5V.
Second is to power ON and properly power OFF (to avoid corruption problems with the SD card).
There are some solutions on internet but I didn't find anything which included all my requirements.
Requirements are:
no additional battery, only use the car battery
no additional switch, only automatic power ON and power OFF with ignition key(ACC)
integrated DC/DC power supply for the Raspberry (5V)
same dimensions as a Raspberry Pi for easy mounting
This module allows:
power ON the Raspberry Pi after “timeON” elapsed (ACC/IGNITION in the position ON)
properly shutdown the Raspberry Pi after “timeOFF” elapsed (ACC/IGNITION in the position OFF)
completely power OFF the Raspberry Pi after timeSHUTDOWN elapsed
also cut-off built in DC/DC step down power supply, so there is no standby current consumption
all time values are user programmable (1-99 seconds range) via USB/TTL serial adapter (CP2102, CH340G,...).
Technical details:
input voltage: 12V (car battery) *
output voltage/current: 5V/5A *
PCB dimensions and mounting holes are same as a Raspberry Pi 3
Possibility to attach PCB upside down (on the bottom side of the Raspberry Pi)
input power supply connector with 3 screw pins (+12V ACC, GND, +12V CONSTANT)
2 pin headers for interconnection with the Raspberry Pi (+3.3V, GPIO21)
pins for programming time values( timeON, timeOFF, timeBOOT and timeSHUTDOWN)
LED to indicate ACC is ON
LED to indicate DC/DC power supply is ON
The module can be attached to the bottom of the Raspberry Pi, so the top side is free for another purpose.
DC/DC step down power supply is on the standalone PCB and attached to this PCB. This DC/DC is finished product from eBay/AliExpress.
*For connection power supply to Raspberry Pi use USB_A to micro_USB cable (male/male).
*For connection +3.3V and GPIO21 pins use jumper wires (2.54mm, female/female).
How it works:
INSTALLING PYTHON SCRIPT FOR SHUTDOWN:
For use this module you need to create a Python script and allow it to run at boot time.
Script and procedure are described in the documentation file.
CONNECTION:
connect +12V constant, GND and +12V ACC/IGNITION to the screw terminal.
connect 2 pin marked as +3.3V and GPIO21 to the Raspberry Pi.
connect USB/micro_USB cable from module to the Raspberry Pi.
MOUNTING(optional):
You can use standoff spacer for mounting this module on the Raspberry Pi.
POWER ON
After ACC/IGNITION is ON, the micro-controller is waiting for “timeON” delay time.
If the time does elapse, the micro-controller activated DC/DC power supply and Raspberry Pi will start to boot.
If the time does not elapse, the output power is not activated so the Raspberry Pi will not start.
If ACC is back to OFF position before elapsed “timeON”, the whole process starts at the beginning after ACC/IGNITION is ON again.
This allows short temporary ACC/IGNITION ON without starting the Raspberry Pi (if you forget close your windows or something that requires ACC/IGNITION ON, Raspberry Pi will not start before “timeON” elapses).
After boot process has started ACC/IGNITION is temporarily disabled because of proper boot procedure (“timeBOOT” value).
POWER OFF
After ACC/IGNITION is OFF, the micro-controller is waiting for “timeOFF” delay time.
If the time elapses, the micro-controller sends a command to activate the script in the Raspberry Pi to properly shutdown.
After that turn OFF DC/DC power supply after “timeSHUTDOWN” values elapesd.
If the time does not elapse (“timeOFF”) output power is still activated so the Raspberry Pi continues running.
If ACC/IGNITION is back to ON position just after the shutdown script starts or in time before DC/DC is powered OFF (“timeSHUTDOWN”), Raspberry Pi will be start boot immediately without delay. This is the fast boot method.
PROGRAMMING times values:
timeON; waiting time to power up Raspberry Pi
timeBOOT; waiting time to boot Raspberry Pi
timeOFF; waiting time to start shutdown Raspberry Pi
timeSHUTDOWN; waiting time to shutdown DC/DC power supply
Default times (if you not make changes) are:
timeON; 30 sec
timeBOOT; 45 sec
timeOFF; 15 sec
timeSHUTDOWN; 60 sec
To changes this values you need any USB/TTL serial adapter (CP2102, CH340G,...).
For serial monitor you can use Arduino IDE, or Realterm or similar.
Settings for serial monitor: 9600,N,8,1 (CR+LF).
USB serial adapter / RaspberryPi Automatic ON/OFF serial_prog pins:
TX / RX
RX / TX
GND / GND
+5V / +5V
After set and open serial monitor, connect pins TX, RX and +5V.
Then connect GND.
When serial monitor start you will see:
current settings for timeON, timeOFF, timeBOOT and timeSHUTDOWN
message "Click Send immediately on serial monitor to enter in settings mode”.
If you successfully enter into settings mode, message “Time settings mode” will be on serial monitor.
If you don't enter into settings mode, message “Time elapsed, restart and try again” will be on serial monitor.
To restart, disconnect and connect GND (don't disconnect USB serial adapter from computer).
Programming mode use power supply from USB/TTL serial adapter only.
Message format to enter new value is:
Values for each time is 1-99(seconds).
Correct values example:
<5:8:30:30> or <05:08:30:30>
Incorrect values example:
<100:a:30:30>
This incorrect message will be translated to:
Each value which is not in range(1-99) or are not number/format will be replaced with default value.
Detail description,pictures and Python script are in the PDF file in Documentation section.
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Review Breakdown
5
7
4
3
3
0
2
1
1
0
Average Ratings
Product:
(4.82)
Documentation:
(4.82)
Shipping:
(4.55)
Communication:
(4.73)
Trevor |
April 16, 2023
Great board, better then mausberry circuits board
After two failed out of the box mausberry circuits auto on/off boards I found this. Works exactly as it should. Seller has great communication and documentation. I hope seller is able to supply more of these as they are awesome. Couldn't be happier.
Joseph |
March 20, 2023
Awesome!
Great piece of equipment, excellent quality, shipped immediately and seller was really helpful. Totally recommend. Thanks a lot Marko! 👍
Response from PicoTouchStore | March 21, 2023
Thx!
John |
Dec. 1, 2022
Yesssss!!!
Finally got one of these. Had sadly been out of stock or long lead time so had to settle for boards from Mausberry Circuits (which both let out the magic smoke).
Very easy to program. I initially wanted the Pi to startup ASAP but makes sense to set a delay for quick things like power windows or mirrors etc.
Power isn't cut during cranking either!
Setup the script in OpenAuto Pro and works like a charm.
Very happy to have my end-game OAP setup, thanks Marko!
Response from PicoTouchStore | Dec. 3, 2022
Thx!
Cyrille |
June 4, 2022
perfect for me
The perfect product for what I wanted to do. I had a problem with the script (it was my fault) The seller helped me solve the problem. It's perfect.
Troy |
Oct. 16, 2021
Does not include everything needed to program it
While this may end up being a great product ... shipping took forever and after purchasing I'm now realizing it does not include everything needed in order to install any python scripts or modify the startup/shutdown parameters. This was not clear until downloading the documentation. Apparently more hardware is needed to do this. The description made it seem like you just hook pwr gnd and acc and your done. Also seems like there are additional recommended hardware to add inline for the pwr and acc lines.
Response from PicoTouchStore | Oct. 22, 2021
Hi Troy, thanks for the review!
The order was made on Aug. 30. 2012, sent 02.Sep.2021. 19:34:17, delivered 17.Sep.2021 16:04:00, not so bad for this COVID time ...
As you can read in the product description, it is clearly written: "To change this values you need any USB / TTL serial adapter (CP2102, CH340G, ...)." ...
The product normally has reprogrammed (default) values, as written in the description, and as such works immediately after connecting the connecting wires to the screw terminal ... So a USB / TTL adapter is not required for the device to work ....
All the best, Marko
Daniel |
Aug. 31, 2021
Love it
Just what I was looking for, I did a google search and found this site and it was something I was looking for, great price, fast delivery , completely satisfied. Thanks Tindie.
Keith |
July 31, 2021
Works perfectly and very easy to setup.
I ordered this board to power a Raspberry Pi 4b that I am using to drive a digital dashboard for a Megasquirt setup on a custom car I am building. The seller was out of stock for several weeks, but was very helpful and responsive when I asked for updates and additional information.
Once ordered, it took only 9 days (7 business days) to be delivered to North Florida (which is crazy-fast for an international order). The board functioned perfectly and the documentation made it easy to setup and program both the board itself and the Pi to talk to it.
Some tips for people thinking of buying this board (which you totally should!):
Buy a cheap CP2102 USB to TTL/Serial UART module (if you don't already have one) so you have it when your board arrives. That + Arduino IDE makes it very easy to program the board. The documentation shows a schematic using a push button on a breadboard to "trigger" ground for programing. I just used two jumper leads and skipped the button. Just make all the connections besides ground directly from the board to the USB programmer, then have a jumper lead going from the board to a breadboard and one from the USB "to" the breadboard, but not connected. When you are ready to program, just hover your mouse over "send", plug the USB jumper lead into the breadboard (so it shorts to the board lead) and hit "send". You do have to be somewhat quick about it, but it isn't anything difficult. You could also just skip the breadboard entirely and manually short the leads.
The 12v to 5v buck converter is a generic Chinese module available from many sources. I would suspect that if you have a failure/issue with the board down the road, there is a very high likelihood it will be with this module (as the rest of the board is well designed/assembled, and those Chinese modules are much more likely to die than the seller's circuitry, which all uses quality parts). So, if you are using this in a situation where you need high/constant availability, go ahead and buy a spare module or two. A search of "12v/24v 25w buck converter" should get you results with the same module.
If you are using this in a high-heat environment, it might be worth your while to swap the caps on the buck converter for higher quality ones. While the main board uses good-quality parts/caps, the caps on the buck module are generic parts of unknown quality (though are likely just fine for most applications). I swapped mine for some 510uf 35v 125°C rated United Chemi-con units. I would also use some Solastic/silicone/hot melt to secure the caps if you are using this in a high-vibration situation like an automobile.
Finally, if you want to use a different input connector (like I did) the pin pitch on the input terminal block is 5mm. Personally, I swapped the terminal block for a TE "Power Key" socket (model 1376383-1), so that I could use a single plug with latch retention instead of a terminal block. This made sense with my particular use-case, but is certainly not a required modification. Just thought I'd share the pitch and a compatible part in case anyone else had a similar need.
Overall, I am very satisfied with the board. The PCB itself is a good quality 1.6mm FR-4 board with ENIG (gold plated) finish (probably from JLCPCB or similar). The silk-screen legend is informative and well thought-out. Assembly (soldering quality, part placement, etc.) is good with no cold joints or tombstoned/misaligned SMD parts. All of the identifiable components are name-brand and of good quality (LittleFuse, ATMega, STMicro, TI, etc.)
Based on the components used and the ENIG finish, the price is EXTREMELY reasonable. I design boards like this all the time, and I doubt seriously that I could put together a "copy" using my normal sources (JLC and Digikey) for much less, even if I wanted to (and even then I'd have to write the code for it).
Also, based on my pre-purchase interaction with the seller (and the other reviews) if you were to have any problems, I would expect the seller to be very prompt and helpful in their responses. Marco was very fast and friendly in responding to questions about the circuit and very patient with my multiple "when will it be back in stock?" emails.
Thanks, Marco!!
Response from PicoTouchStore | Aug. 1, 2021
Hi Keith! Thank you for the extensive review!
I am glad that you are satisfied with the module, also, as I see, you are familiar with electronics and I am glad to see good comments about the finishing of the PCB, selected components ...
Because of Covid, the delivery is absolutely unpredictable, from China to me, and from me to the customers. Also, many companies have difficulty with stock parts, so the last batch is collected from 3 suppliers which caused me increased shipping costs, plus some EU regulations for everything that arrived from China to the EU ... I’m not sure I’ll be able to keep this price in future ....
The DC / DC converter has proven to be very good so far. It’s a little tall, maybe in some of the next releases I’ll change it with someone else if it passes the test.
I see that you have read the documentation carefully and I am glad to see that everything is described properly (programming process). I may change the module description text with your reviews ;)
The PCB is 1.0 mm, and the connector pitch of the screw terminals is 5.08 mm, of course you can replace them with a pitch of 5.0 mm, it is not too important for this short terminal ...
All modules were tested with a load of 2.5-3A @ 5V and input voltage range between 10V and 15V. Delivery is made after this step ...
Greeting, Marko
Joseph |
March 23, 2021
Great solution for CarPi
I purchased this to have a cleaner solution for my CarPi system. I had my own 12v to 5v converter, but it was a bit clumsy. And, I wanted to incorporate a safe shutdown mechanism, to keep from corrupting my SD-Card on the Pi. After wiring up a test system to a 12v battery the delayed power worked out of the box. The only issue I was having was making sure the Pi was powering off properly. I realized that it wasn't because I had glossed over the directions. In short, I didn't realize that the GPIO21 on this device HAD to be connected to the GPIO21 (pin 40) on the Pi for the Python script to trigger the shutdown. My bad! In short, I connected the USB-A on this device to my Pi's USB-C connection AND connected GPI021 to GPIO21 between this device and the Pi. Then everything worked as expected. I'm still learning about the Pi GPIO connections. I added a simple message in the Python script to log a shutdown just before the "poweroff" call.
This is a very clean solution. Shipping took about 13 days to the States.
Response from PicoTouchStore | March 24, 2021
Thanks for the review Joseph!
Ben |
Jan. 14, 2021
Awesome solution for Pi running LineageOS
My communication with PicoTouch was awesome. This was really my first RaspberryPi build so naturally I had a lot of questions. PicoTouch was very patient and communicative throughout the whole process providing help where he could and offering direction where he didn't have all of the answers.
The product itself is perfect for my application. I am using one of the USB ports to power my pi while the second one is being used for an HDMI-to-RCA converter. The only challenge for me was getting the unit to work properly with a Pi running LineageOS (which doesn't support Linux) but Pico helped me discover a forum where I was able to get proper code to get the unit working. The only modification I had to do beyond getting new code, was connecting the unit to a different GPIO pin (GPIO21 is reserved for other activities with LineageOS).
I would highly recommend this product to anyone who is considering it!
Response from PicoTouchStore | Jan. 16, 2021
Thank you very much sir! I am glad that the case with LineageOS has been successfully resolved! Greeting!
Cristian |
June 27, 2020
Very good product
Product works perfectly, arrived in ok time considering I've ordered it in the middle of the pandemic, the product was slightly damaged when arrived but I've managed to repair it with great help from the vendor, great communication and documentation too, I've tested it and it works wonderful. Going to integrate it in a build on my car and post a video about it. I strongly recommend.
Peter |
Nov. 7, 2019
best alternative to a mausberry
Fantastic quality. it's simple and that isn't a bad thing . I originally had a mausberry control board and after failing in 2 days many emails and no replys. I decided to buy this and it's perfect for my raspberry pi based car dash
Response from PicoTouchStore | Nov. 8, 2019
Hi Peter,
glad to hear you are satisfied with the product!
Enjoy automation!
Greeting!
Response from PicoTouchStore | Nov. 8, 2019
Hi Peter, glad to hear you are satisfied with the product! Enjoy automation!
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