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Topic starter
2024-09-22 5:50 pm
Hello again everyone 🙂
I am tinkering with some projects requiring an ATTiny. To keep things simple I would like to use as few parts as possible. The powersource is 8.4 volts and so far I have been using a voltage regulator to bring the voltage down to 5 volts.
To save components I have been trying to find an alternative chip that can handle up to 9 volts, but still run nicely at 5 volts too. So far I have not been able to find such a replacement.
Do you have any suggestions?
Kind regards, Knut
2024-09-22 6:39 pm
@kabl I am not aware of any, but then my memory is bad. I would never pick a board based on voltage, it's so trivial to adapt almost any supply to almost any voltage needed. I used to do a lot with RV's which are 12V, I had a standard rig of a buck from 12 to 7ish then a VR from 7ish to 5. YMMV.
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.
2024-09-22 7:03 pm
Hello again everyone 🙂
I am tinkering with some projects requiring an ATTiny. To keep things simple I would like to use as few parts as possible. The powersource is 8.4 volts and so far I have been using a voltage regulator to bring the voltage down to 5 volts.
To save components I have been trying to find an alternative chip that can handle up to 9 volts, but still run nicely at 5 volts too. So far I have not been able to find such a replacement.
Do you have any suggestions?
Kind regards, Knut
Instead of a standard voltage regulator, you can use an LDO regulator. You can make a power supply module like this for your setup: https://www.pcbway.com/project/shareproject/MCP1700_Mini_Breakout_Board.html
MCP1700 can step down 8.4V to 5V with minimal additional circuitry.
2024-09-22 8:10 pm
@kabl
Use an Arduino and let its builtin regulator chop the voltage down to 5V.
Anything seems possible when you don't know what you're talking about.
Topic starter
2024-09-22 8:52 pm
@zander Yeah, that is my current setup, which I am trying to get away from. Voltage regulators, LDO or otherwise, is a no-go.
Topic starter
2024-09-22 8:56 pm
@will I need to cut down on parts, to make this project simpler. What I need is a chip that can handle a little higher voltage than the usual 5 volts. Adding an Arduino does _not_ cut down on parts, cost or achieve what I am trying to do. Currently I have a voltage converter in SMD factor that does the job. I am trying to loose that, and make the chip work with the supplied voltage as is.
2024-09-22 9:17 pm
@kabl Your problem is you are heading in the wrong direction, the current standards re logic voltage are 5V, 3.3V, and 1.8V with 5V the oldest, and 1.8V the newest. I don't see us going up to 9V since it's all about size and low voltage.
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.
Topic starter
2024-09-23 6:33 am
Alright. Either I have to use a voltage regulator, or I could go back to the 555 which can handle the voltage, but that would mean more components again. I found the NXP S912ZVHY32F1VLL, 16bit HCS12Z Microcontroller which can handle up to 18 volts, but its not suitable for my needs.
Thank you all for the pointers so far. I havent played around with this for a long time, scary how quick I forget.