Comments: TPL5110 Nano Power Timer Hookup Guide
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I can't believe you guys didn't leave pin 6 broken out, so you could use it in One-shot mode!
One-shot mode is very useful for interactive battery powered projects. In this mode, it will remain in low power off condition, until a button press to wake it up, and then power back off when either the timer runs out or if it gets a Done signal sooner.
You need to make a new version of the board with the One-shot pin broken out.
Curious, how is that different than the drive pin?
Hi.
The nanotimers I have are behaving not as described. With DONE pin N/C, when power is applied and the time interval completed, Vout is supplied for < 1s and then is cutoff, then the cycle repeats.
If I pull DONE pin to GND, Vout is supplied after time interval is completed and stays supplied until DONE pin connection is broken. Bringing DONE to HIGH has no effect. This is the same for both units. Anyone else having this problem?
What happens if the a done signal is not sent before another full cycle of the timer? Ex, say my code takes 15 seconds to run but the timer has been configured for a 2 second cycle (a practical example would be a interactive display that checks a sensor every 2 seconds and if triggered then it starts a long animatronic that lasts 15 seconds). Will the timer reset the driven device at the next cycle (at the 4 second mark) or will it simply leave power on?
Hi, I have recently got a Nano timer, I am using it tandemly with Arduino pro mini and an I2c RTC module hooked up to my microcontroller; I use it to turn on every 5 minutes so my Arduino can check the time of day using the RTC and only keep the power of project for certain hours a day and if it is not within that range it turns the arduino off with the Nano disable pin; for example only keep project powered two hours a day between 10:00 AM to 12:00 PM and keep it powered off between heartbeats any other time. Now my wiring is pretty much matching the hookup guide and everything works as planned :) until the next heartbeat while the project is on window (10AM to 12:00 PM) what happens then is my microcontroller kind of looses power for about a second and comes back up, while this is ok for my microcontroller I also have a solid state relay triggered on a digital high signal powering other 12 V DC device (a camera) and this power flick kills my relay and thus turns my camera while the on period every heartbeat (5 minute timer interval) So looooong story short how can my project not being effected by the heartbeat if my project is spanned multiple timer ticks ?
Excuse me for my English, I hope you can help me, I have been using my TPL 5110 for a few months and until today I have only managed to get the example code to work, however, I am not able to get a sensor reading done or to save some data in an SD memory, I hope you can help me
Unfortunately, we don't provide code consultation services. I recommend looking at getting data from your sensor first; then, saving that data to an SD card... before you start trying to use the nano power timer.
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Is there a way to disable the red LED on the TPL5110 Nano Power? I've got a datalogger with a humidity and temp sensor and I'm powering it with a small 3.7 lipo 800mAh I have it set to record temp/humidity every 30 min and I'm wanting to get it to run as long as possible. I figured if I could disable the LED, I might save a little more power. Thanks in advance!
I put a jumper on the underside of the Nano Power Timer for just this reason. Simply cut this trace between the two pads to disconnect the LED. Thanks for the comment, because this information was accidentally left out of the hardware guide, but has now been put in. Take a look in the Hardware Overview under the "LED" section.
Ah that's good news. (I have it in a breadboard and didn't notice it since it's on the bottom) Anyhow, thanks, I will cut it and get even a little more juice out of my batteries!
Also, I understand I need to bring the Done pin to high to shut it off, but can I connect the DRV pin to EN pin (Enable pin) on the ESP8266 board? Does that work to turn the ESP8266 on?
I would think that it would work, but have not tested it myself. It might be worth dropping a line on the SparkFun forums to see if anyone out there has done this.
Hi, doesn't the RedBoard Turbo require a min of 5 volts to run correctly? If so, how is the 3.7 lipoly working in the example you've shown?
That's a great question. In the example above we're inserting power to VIN which is regulated down to 3.3V which is in line with the SAMD21's logic level of 3.3V (not 5V). Feel free to ask more questions if that's not obvious or check out the Redboard Turbo's hookup guide.
Okay got it thanks! One more quick question...I'll start a new thread. See below.
Hello, thanks for this timer! It was what I need. It could be usefull to add a piece of code with a counter to give number of wake up per day for exemple if we have a RTC.
Also I think it would be really useful to make a truly "nano" version that can fit in a pen with a aaa battery with only the power pins and an empty resistor slot to program it!
That is an interesting thought, I'll keep this in mind.