Power distribution board for ant/beetle weight combat robots. Uses through-hole XT30 connectors, a 3mm LED, a surface mount resistor, and a FingerTech power switch.

Power distribution board for ant/beetle weight combat robots. Uses through-hole XT30 connectors, a 3mm LED, a surface mount resistor, and a FingerTech power switch.

Credit: https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbXRpSkhHNnUyMWxjYTJRVkI0b3EtcjZuUDFNZ3xBQ3Jtc0tsWXJPZ0VoZXVfZi1jNjJYeC1EN1ZOR1RKNFdTOG5yM0ZyVGg1aUx5Um5LYkJzVWtfZkJiNlVRdmdFZU03YWlHb25iR1cxRXd6aVlyNlFJN0dWblVETjg0WUNtbGc0bm1GRU9fbjdRMXA2SV94dDQ5WQ&q=https%3A%2F%2Fgithub.com%2FTishima%2FmyDRAMTester&v=JHucAeh6SI8

Prototyping Shield for Arduino Micro with SMD footprints SO08, SOT223 and SOT23

Have you ever been frustrated creating a prototype using a simple MOSFET or 8-pin chip that’s only available in SMD? This Micro Proto Shield is the answer, for the Arduino Micro platform.

Information on the board

All Arduino pins are labelled on both sides of the board. The Arduino symbol and the ISP header outline are provided to help you plug in the Micro the correct way around.

All wires to the SMD footprints are shown in white on the silkscreen so you can quickly see which hole connects to which SMD pad.

N-channel MOSFETS connected to PWM pins

The two large MOSFET footprints Q1 and Q2 are already connected to the first two PWM pins (3 and 5) on your Arduino. Source is connected to grounds and the Drain output has a prototyping hole connected to the large tab on the transistor.

The transistors require pulldowns to hold them in the off state while the Arduino bootloader is active. Footprints for 0805 size resistors are provided for R1 and R2. Or you can wire through-hole resistors to the pads adjacent to pins 3 and 5.

If the pinouts on your transistors are different, just cut the resolderable traces between the holes and wire them up how you want.

SOT23 footprints

The large SOT-223 transistors have enough space inside their footprint to include pads for SOT23 size transistors too: Q3 and Q4. The wiring is the same as common N-channel MOSFETS or you can cut the resolderable traces and wire it however you want.

SO-8 integrated circuit U1

This seems to be a common size for memory chips, thermocouple interfaces and a lot of other different chips. All 8 pins are broken out to holes, with no default wiring. Connect your chip any way you want.

95 free prototyping holes

There’s still a large number of free holes on the board, so a 14-pin DIL chip can be installed or anything else that fits. +5V, +3.3V and ground buses are provided at both ends of the board.

Check out the standard prototyping version too

I’ve also shared a version without the SMD footprints, if you need more conventional components.

Uses MX28F2000 to hold 3 or 4 games. The games are selectable with dip switches.

LED driver board that plugs into a Pico. Constant current buck using LM3405 and has STEMMA QT connector.

NAN

6x power-supplied optocoupler circuit

Idea and schematic a la Facelesstech (https://facelesstech.wordpress.com/2022/12/17/gameboy-macro-tv-out-the-cheap-way/)

R1 - R6 - 470 Ohms 0603 Resistor R7 - R10 - 220 Ohms 0603 Resistor

Screen switch vias placed to work easier with this nod for the stylus port - https://www.ebay.com/itm/134222632940

TMT - Warping Harness Strain Gauge Reference Board

Replacement for an AR88 bathtub capacitor. Use with turret type terminals to replace the Aerovox bathtub capacitors in an AR88 radio set. Works for all but the large 0.22uF one beside the audio bias board.

PWM Fan Control for NerdMinver V2, please See details here