Delay using 8051 Timer
https://www.electronics-lab.com/delay-using-8051-timer/
The major component of this circuit is Microchip’s SST89E54RDA-40-C-PIE, which is a pin-for-pin compatible with typical 8051 microcontroller devices. It has a built-in timer used to produce accurate time delay. The light emitting diode (LED) is connected through the 330Ω resistor to indicate the time delay. The blinking LED switches ON for 1ms and switches […]
IC monitors multicell battery packs
https://www.electronics-lab.com/ic-monitors-multicell-battery-packs/
by Susan Nordyk @ edn.com: The ISL94203 battery-pack monitor IC from Intersil monitors, protects, and cell-balances three- to eight-cell rechargeable battery packs, supporting Li-ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries. Its internal state machine has five preprogrammed stages that accurately control each cell of a battery pack to extend operating life. In addition to […]
Mesa-Video : 800×600 Digital video for Arduinos
https://www.electronics-lab.com/mesa-video-800x600-digital-video-for-arduinos/
blackmesalabs.wordpress.com has build a video system for Arduino boards: This post describes Mesa-Video, a low cost, low power, small size and fully Open Source Hardware and Software solution for providing 800×600 digital video for Arduino ( and other ) microcontrollers. Mesa-Video makes it quick and easy to display text and 24bit color graphics from any […]
Arduino Oscilloscope
https://www.electronics-lab.com/arduino-oscilloscope/
Noriaki Mitsunaga has build an Arduino Oscilloscope using minimum parts. He writes: I have created a simple Arduino Oscilloscope as above picture shows. Here is its summary. You can build your own! Arduino Oscilloscope – [Link]
MCP2221 HID Library
https://www.electronics-lab.com/mcp2221-hid-library/
Zak’s Electronics Blog published a new library and breakout board for MCP2221 USB to UART interface IC: This is a library for interfacing with the HID features of the MCP2221 USB to UART and I2C/SMBus serial converter from Microchip. The converter includes 4 GPIO pins, 3x 10-bit ADCs, 1x 5-bit DAC and more. Microchip does provide […]
ESP8266 + Attiny85 + DHT22 Temperature/Humidity Logger
https://www.electronics-lab.com/esp8266-attiny85-dht22-temperaturehumidity-logger/
by guibom @ github.com: Basic ESP8266 + Attiny85 + DHT22 Temperature and Humidity logger. I’ve made this to experiment a bit with the ESP8266 wifi module, and hopefully make a remote sensor that posts the data to my server. I wrote the code to work with both an atmega328 and a attiny85. The mcu sleeps in between […]
Enclosure 1455 NHD won’t be scared by a hot summer
https://www.electronics-lab.com/enclosure-1455-nhd-wont-be-scared-by-a-hot-summer/
The latest extruded aluminium enclosure from Hammond production – 1455 NHD is suitable even for devices requiring more intensive cooling. The latest addition to the family of the popular 1455 enclosure series is the enclosure with “NHD” suffix – where “HD” marks “Heat Dissipating” design. Six fins (zones) with cooling ribs significantly improve cooling. With […]
Triacs – How to calculate power and predict Tjmax
https://www.electronics-lab.com/triacs-how-to-calculate-power-and-predict-tjmax/
An application note from NXP on how to calculate the power dissipated by the triac: This Application Note describes how to calculate the power dissipation for triacs and Silicon Controlled Rectifiers. Thermal calculations are also included to help the circuit designer to predict the maximum junction temperature or calculate the required heatsink thermal resistance. Four […]
Milk in Fridge – Internet of Things
https://www.electronics-lab.com/milk-in-fridge-internet-of-things/
by samsungite @ instructables.com: I think that one day, all food cupboards & fridges/freezers will be smart. All products will have an RFID or video recognizable label which will update a list of product usage. Your local supermarket will gather this information & replenish your products as required – who knows ?? Milk in Fridge – […]
50,000V High Voltage Power Supply
https://www.electronics-lab.com/50000v-high-voltage-power-supply/
by Victor8o5 @ instructables.com: This high voltage power supply has been designed to output a fixed voltage of around 50kV, it could easily be converted to an adjustable supply by connecting a variac in case of using transformers or by adding some extra circuitry to regulate the power going in. I initially thought about a high […]