Gain reduction board for the Saleae Logic Pro

viewerscreen breakout v4

bnc ground isolator

PCB for the project described here: https://eax.me/electronic-dice/. Source code: https://github.com/afiskon/avr-electronic-dice.

`````IC1: ATtiny85

C1: 10 uF

S1: button

S2: switch

R1-R4: 220 Ohm

R5: 10KOhm

D1-13: 5 mm LEDs

Power source: 3-5V, e.g. an CR2032 battery

https://github.com/aspro648/KiCad/tree/master/projects/rroll

V4 of the Calculator PCB (No Top Soldermask). Source files at https://github.com/charliebruce/calcuclock-hw

RPUlux

Controller board with six AL8805 constant current drivers connected to PWM pins of an ATmega328p. Analog channels ADC0, ADC1, and ADC2. ADC0 and ADC1 also have an N-CH MOSFET that may be used to sink a few amps of current. Two 22mA current source for various task. ADC6 measures input voltage (7 thru 36V DC) and ADC7 measures input current. SHLD_VIN that can power a shield may be disabled with IO2 (so it can power off a Pi Zero on the RPUpi shield)

GitHub Forum HackADay

This board is one of a set for the Laser Battle Bot project.

Second in a set of PCBs for the Laser Battle Bot Project

SSD1309 I2C connection

LED moved away from the power jack location

Please see description here https://hackaday.io/project/20424/components

Details are here:

https://www.openhardware.io/view/316/RFM69-Serial-GW-ATMEGA328P

Simple interface to run my Anet A8 using ESP3D and an ESP-01 module. A TTL gate keeps startup serial data out of the printer. Requires removing 2 zero ohm resistors and installing a 6 pin header on the Anet controller in the BLE/USB position. You will also need to add code to the ESP3D sketch’s setup() function to set GPIO 0 as an output and write a logic LOW to that pin in order to enable transmit data to go out of the ESP-01 to the printer. This board should plug in to the connector next to the LCD connector. Power should be taken from the 12v board power (or a separate wall-wart might be used). I wasn’t sure if the on-board regulators would handle the extra load of an ESP8266.

Later edit, after getting boards built and tested: Going from 12v to 3.3v generates a lot of heat. I recommend to either use an external 5v supply (not 12v) or replace the regulator at U1 with a Recom R-78E3.3-1.0 (though the pinout will be different!! Watch how you wire it!)

License: Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Board and schematic (eagle format) are at https://github.com/telanoc/anet_esp3d_board

The power switch in this one is backwards. Down is Off, Up is On If you want a better version, use this one: https://oshpark.com/shared_projects/OSfM0RLN

Adapter Maskrom 36 pin Snes Cartridge M27C322 16 bit conversão 8 bit 2 IC 74lS245+74lS139 SMD

M27C322 DIP 42 - Maskrom DIP 36 Snes 2 X IC 74LS257

Based on the original by Andrew Kramer for his Colin robot. But updated with the new ATTiny841 (and mounting holes). All caps and resistors are 0805 format R1 = 10K R2, R3 = 4K7 (optional pullup resistors) C3 = 100nF C4 = 10uF standard pinheaders are used for all connectors. The processor is an SOIC package ATTiny841.

150MHz Low Pass Filter

All Parts are available at Mouser and many other parts vendors.

SMA Male Edge Mnt for .062" Thick Brds Manufacturer: Linx Technologies Part Number: CONSMA013.062 Qty Required: 1

SMA Female Edge Mnt for 0.062" Thick Brds Manufacturer: Linx Technologies Part Number: CONSMA003.062 Qty Required: 1

Capacitors: C5, C8 Multilayer Ceramic Capacitors MLCC - SMD/SMT 100volts 24pF C0G 5% Manufacturer: Kemet Part Number: C1206C240J1GACTU Qty Required:2

Capacitors: C6, C7 Multilayer Ceramic Capacitors MLCC - SMD/SMT 1206 39pF 50volts C0G 2% Manufacturer: Vishay / Vitramon Part Number: VJ1206A390GXAPW1BC Qty Required:2

Inductor: L1, L3 Fixed Inductors 1206CS AEC-Q200 68 nH 5 % 0.9 A Manufacturer: Coilcraft Part Number: 1206CS-680XJLB Qty Required:2

Inductor: L2 Fixed Inductors 1206CS AEC-Q200 82 nH 5 % 0.9 A Manufacturer: Coilcraft Part Number: 1206CS-820XJLB Qty Required: 1