Digital Sheva

Directions

Digital Sheva Graphic Designer | Electrical and Electronic Engineer | Tech info | Passionate about tech, design, and innovations. Real facts that inform and inspire.
(2)

History • Science • Society • Reality

23/08/2026

One-touch power on/off

22/08/2026

Clever use of integrating circuits

Big shout out to my new rising fans! Omorogieva Osadiaye Nuel, Joe Kroome, Ag Lakshan
21/08/2026

Big shout out to my new rising fans! Omorogieva Osadiaye Nuel, Joe Kroome, Ag Lakshan

A BJT mainly operates in three regions: cutoff, active, and saturation. In the cutoff region, the base-emitter junction ...
19/08/2026

A BJT mainly operates in three regions: cutoff, active, and saturation. In the cutoff region, the base-emitter junction is not sufficiently forward biased, so base current is nearly zero and collector current is also nearly zero. The transistor behaves like an OFF switch, similar to a closed water tap. In the active region, the base-emitter junction is forward biased, typically around 0.7 V for a silicon transistor. A small base current controls a much larger collector current, approximately IC = β × IB. This region is mainly used for amplification. In saturation, both junctions are forward biased and the transistor is fully ON. Increasing base current further produces little increase in collector current. This region is commonly used for switching.


18/08/2026

Not all filters are equal. Unfortunately trade-offs are everywhere. Choose based on your needs.

⚡ 4-Channel Relay Driver CircuitControl multiple high-power devices with a simple and reliable relay driver circuit! 🔌✅ ...
13/08/2026

⚡ 4-Channel Relay Driver Circuit

Control multiple high-power devices with a simple and reliable relay driver circuit! 🔌

✅ Uses BC557 transistors for stable relay switching
✅ Drives 4 independent relay channels
✅ Perfect for Arduino, ESP32, IoT, and Home Automation projects
✅ Safely switches lights, motors, pumps, and other loads

A simple circuit that opens up endless automation possibilities! 🚀

12/08/2026

Let’s go deeper into switching power supply design. This episode covers key circuit stages, switching components, energy conversion, feedback control, and how they work together inside a real power supply.

12/08/2026

The UC3842 is a popular PWM controller IC used in SMPS, DC-DC converters, battery chargers, and LED drivers. It regulates the output voltage by controlling the switching of a power MOSFET using Pulse Width Modulation (PWM). The feedback pin keeps the output stable, while the current-sense pin provides overcurrent protection. The oscillator sets the switching frequency, making the converter efficient and reliable. Its built-in protection and simple design make the UC3842 a widely used IC in modern power electronics.

Address

Gwagwalada
Abuja

Website

Alerts

Be the first to know and let us send you an email when Digital Sheva posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category