Pauper’s Rotary Encoder
Quadrature Encoder is a familiar everyday sensor in robotics world. A quadrature encoder is a handy rotary encoder that let you know the speed and direction of a rotating shaft or linear motion. Let’s start […]
Tiny Chirp
So I have this Tiny Chirp, when you power it up, an indicator wakes up and it does a sequence of wonderful chirps! First, you need one active piezo-buzzer (i.e. the type with a built-in […]
Laptop Security Alarm
Want to keep your laptop/notebook securely? Introduced here is the idea of a simple yet effective laptop/notebook antitheft alarm device with a security cable that fits in the USB port of the laptop/notebook. The security […]
Hearing Aid DIY Kit
I was following some sellers on the internet, searching a lot more, to get a few difficult-to-get components for some other electronics projects I was planning, and then stumbled haply on a do it yourself […]
Data Slicer Primer
Any electronics experimenter can connect an analog sensor to a microcontroller and run it with the help of a piece of code. Sometimes there’s a reason to provide a clean digital signal input to the […]
Pulse Drop Detector
In this episode, you can see a simple yet reliable idea to build your own pulse drop detector circuit which is nothing but a configurable dual-monostable setup tailored for some distinct real-world applications. The given […]
LiFePO4 Battery Charger
Perhaps, the most ideal rechargeable battery chemistry for industrial electronics today is the LiFePO4 (lithium iron phosphate) battery. This newer type of lithium solution is inherently non-combustible and best known for its strong safety profile […]
Lady Beetle LED
Lady Beetle LED is nothing but a little automatic model toy light, may be a nice Xmas gift for your loved companion. Here’s its tried and tested circuit diagram: As you can see, the circuit […]
USB to DMX Interface Adapter/Converter (v1.0)
This is another revision of my USB to RS485 Converter circuitry which performs the USB (Universal Serial Bus) to two wire RS485 (two-wire half-duplex) and vice versa. This time the design focus is much more […]
Little LED Night Marker (v1)
Little LED Night Marker introduced here is a simple circuit based on the common and cheap dual-operational amplifier LM358. The night marker is in fact a safety device designed to mount near obstructions in unilluminated […]