Reverse engineering the popular 555 timer chip (CMOS version)
https://www.electronics-lab.com/reverse-engineering-popular-555-timer-chip-cmos-version/
Ken Shirriff reverse engineer the CMOS version of 555 timer IC and explains how it works. This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it work. The popular 555 timer integrated circuit […]
PIC16F628A Programmable Digital Timer
https://www.electronics-lab.com/pic16f628a-programmable-digital-timer/
Raj Bhatt shared another project with us. This time is a programmable digital timer with relay switch based on PIC16F628A. Programmable relays find use in numerous automation applications such as automatic street light control, watering and pump control, HVAC, home automation, power plants automation in industries, etc. This article describes how to build a fully […]
Reverse engineering the popular 555 timer chip
https://www.electronics-lab.com/reverse-engineering-popular-555-timer-chip/
Ken Shirriff wrote an article on reverse engineering the 555 timer chip, He writes: This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it work. The popular 555 timer integrated circuit is said […]
DC Motor Speed and Direction Controller
https://www.electronics-lab.com/dc-motor-speed-and-direction-controller/
DC Motor Speed and direction controller project based on L293D H-Bridge and 555 Timer IC. 555 Generate PWM and L293D works as output driver. The 293D provides bidirectional drive current up to 600mA a voltage from 5V to 12V. L293D includes the output clamping diodes for protections. Specifications Supply 5 to 12 V Inhibit facility/enable […]
ATTiny25 based tea timer
https://www.electronics-lab.com/the-perfect-tea-timer/
Michael @ acidbourbon.wordpress.com has built the “perfect” tea timer project. He wrote a post on his blog detailing its assembly: Maybe you just drink coffee. Then this article is not particularly interesting for you. But if you like a cup of black or green tea once in a while you might know the problem: You prepare […]
555 Timer Teardown
https://www.electronics-lab.com/555-timer-teardown/
Ken Shirriff has done a detailed teardown of the popular 555 timer IC. Let’s take a look inside this little chip: Given the popularity of the 555 timer, I thought it would be interesting to find out what’s inside the 555 timer and how it works. While the 555 timer is usually sold as a […]
Programmable CW Morse beacon
https://www.electronics-lab.com/programmable-cw-morse-keyer/
Marko Pavlin has designed a Mini USB dongle with STM32F0xx that is connected to USB and controlled via command line interface. Mini USB dongle with STM32F0xx is suitable many for simple, mini projects. I attached speaker to Timer14 PWM output (Pin PA6) and LED (or optocoupler connected to PTT) to GPIO pin PA0 The provided […]
How to Read a Datasheet
https://www.electronics-lab.com/how-to-read-a-datasheet/
Here is a PDF document written by D. Grover, explaining how to understand a manufacturer’s datasheet. It goes through the 555 timer IC datasheet and gives an explanation on various parts. How to Read a Datasheet – [Link]
230 VAC Timer
https://www.electronics-lab.com/230-vac-timer/
Classic AC 230 V Timer project can be used in all application requiring a timer of up-to 3 Minutes to operate or control any AC mains load of up-to 200 Watts. This project is based on the Classic 555 Timer IC, triggering a TRIAC. Input and Output is Optically Isolated. Specifications Supply input 12 VDC […]
2 Digit 99 Seconds Timer
https://www.electronics-lab.com/2-digit-99-seconds-timer/
2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time. This project can find many uses in your shack and home. The relay output remains on during the Count Down period, allowing you to interface load or alarm that you want to keep it on for […]