SparkFun Battery Babysitter
https://www.electronics-lab.com/sparkfun-battery-babysitter/
The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively. The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The […]
Full featured Arduino DSLR Intervalometer
https://www.electronics-lab.com/dslr-intervalometer/
by aniansh @ instructables.com: Have you ever felt like creating one of those city street time lapses that you see on the internet or recording the blooming of a flower through a time lapse or maybe create a night sky panorama of the milky way drifting in the background? Well, now you can do so […]
Conventional Flow vs Electron Flow Explained
https://www.electronics-lab.com/conventional-flow-vs-electron-flow-explained/
“baldengineer” explains which way the current flows. A couple of weeks ago I wrote about four current flow direction myths. As a follow up to that popular post, I decided to dedicate this month’s AddOhms electronics tutorial video to Current Flow. In episode #19, I tackle the question of which way does current flow. You […]
Inside the SDS7012 Oscilloscope: Mainboard Analysis
https://www.electronics-lab.com/inside-sds7012-oscilloscope-mainboard-analysis/
Christer Weinigel has been tinkering with an OWON SDS7012 o’scope, including deciphering the device’s OS and even disassembling the bootloader. Now it’s time to dive in and examine the mainboard, physically, with many of the board’s sub-circuits explained. via adafruit.com Except for soldering some wires to the JTAG and serial port on the scope, most […]
Wireless Weather Station using Arduino Due, DHT22 sensor and NRF24L01+
https://www.electronics-lab.com/wireless-weather-station-using-arduino-due-dht22-sensor-nrf24l01/
educ8s.tv uploaded a new project on youtube. In this video we build a Wireless Weather Station using the fast and powerful 32bit Arduino Due board. We measure the temperature and the humidity with a couple of DHT22 sensors and we communicate with the remote sensor using the 2.4GHz NRF24L01+ module. Let’s see how to build […]
Count down timer for UV lamps using PIC16F887
https://www.electronics-lab.com/count-timer-uv-lamps-using-pic16f887/
Here is a countdown timer for UV exposure lamps @ cuteminds.com Here follows a simple count down timer useful for the production of pcbs using photoresist and UV lamps. We have used a pic 16F887 Microchip microcontroller; there are no particular reasons, we have simply used the picmicros available at the moment. Count down timer for […]
High Current Discrete Half-Bridge Based on IR2104 or IR2101
https://www.electronics-lab.com/high-current-discrete-half-bridge-based-ir2104-ir2101/
This is a discrete Half-bridge driver based on IR2104 gate driver IC and low impedance high current N channel IRFP4368 MOSFETS. The IR2104 is a high voltage, high speed power MOSFET driver with independent high and low side referenced output channels. HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. The logic input is […]
High Current Discrete Half-Bridge Based on IR2104 or IR2101
https://www.electronics-lab.com/project/high-current-discrete-half-bridge-based-ir2104-ir2101/
This is a discrete Half-bridge driver based on IR2104 gate driver IC and low impedance high current N channel IRFP4368 MOSFETS. The IR2104 is a high voltage, high speed power MOSFET driver with independent high and low side referenced output channels. HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. The logic input is […]
Dynamic-load circuit determines a battery’s internal resistance
https://www.electronics-lab.com/dynamic-load-circuit-determines-a-batterys-internal-resistance/
by Jim Williams @ end.com The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value—often a few milliohms—depends on the battery’s electrochemical condition and construction. If you attempt to use an ordinary ac milliohmmeter containing a kilohertz-range ac excitation source to measure a battery’s internal […]
16 Channel InfraRed remote controller
https://www.electronics-lab.com/16-channel-infrared-remote-controller/
16 Channel Infra-Red remote controller is based on PIC16F73 Microcontroller from Microchip. The receiver part follows RC5 (Philips) Code Format. Tiny receiver provides 16 latch outputs or 8 Latch + 8 Momentary outputs by closing Jumper J1. All outputs are TTL and can drive Relay board or solid state relay. The circuit uses TSOP1738 Infra-Red […]