transistor-tester
micronucleus
transistor-tester | micronucleus | |
---|---|---|
1 | 3 | |
129 | 1,636 | |
- | 0.6% | |
0.0 | 2.5 | |
over 1 year ago | 3 months ago | |
C | C | |
- | GNU General Public License v3.0 or later |
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transistor-tester
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Can someone please help? I have tried making this schematic so many times and still can’t get it to work. I have no idea what I’m doing wrong. Any help would be much appreciated!
Also, take a look here for some additional background information.
micronucleus
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Building the worlds jankiest serial to USB cable from scavenged parts
You can actually bit-bang low speed USB on Arduino [0]. There is even a bootloader [1] for ATtiny. It is obviously not compatible with Arduino, but those tiny boards look too cute to ignore [2]. Also, you can use USB port both for downloading firmware and your application.
[0] https://github.com/obdev/v-usb
[1] https://github.com/micronucleus/micronucleus
[2] https://cpldcpu.wordpress.com/2014/04/25/the-nanite-85/
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Emulator of Original Dell Charger Using ATTINY85
The Digispark[1] and its clones use the ATTINY85 and offer flashing over USB via the Micronucleus bootloader[2] using V-USB[3]. It comes at the cost of a significant chunk of flash storage, but the convenience is excellent. Plus, V-USB support means you can emulate all sorts of USB devices. I've used it to build a DIY NES controller adapter, but it's commonly used as a cheap Rubber Ducky[4]. For projects where USB interfacing makes sense, it can be a good fit.
1: http://digistump.com/products/1
2: https://github.com/micronucleus/micronucleus
3: https://www.obdev.at/products/vusb/index.html
4: https://shop.hak5.org/products/usb-rubber-ducky-deluxe
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Writing bootloader to practice programming skills?
So it looks like they're using the micronucleus bootloader for the linked example. That bootloader not only does the normal bootloader job, but also acts as a bitbanging USB device in order to communicate with the computer over USB. The USB bitbanging is a huge endeavor to undertake on top of writing a bootloader.
What are some alternatives?
ATTinyCore - Arduino core for ATtiny 1634, 828, x313, x4, x41, x5, x61, x7 and x8
HoodLoader2 - 16u2 Bootloader to reprogram 16u2 + 328/2560 with Arduino IDE
Transistortester-Warehouse - The Transistortester's warehouse for firmware, hardware, documentation and more.
cc2538-bsl - Python cross-platform script to upload firmware via the serial boot loader onto the CC13xx, CC2538 and CC26xx SoC.
libusb - A cross-platform library to access USB devices
lk2nd - Secondary little kernel (lk) bootloader for Qualcomm MSM8953 devices
picostdlib - Nim wrapper for the raspberry pi stdlib
svd2nim - Convert CMSIS ARM SVD files to nim register memory mappings
ThinkpadBattery - Open source Thinkpad T420 battery design
dell-charger-emulator - Emulator of original Dell charger using ATTINY85
USBMidiKliK - A robust USB MIDI Arduino firmware, with a dual bootloader, based on the LUFA library