Digital Analog Power Junction

The digital circuits section has been updated, most are in the pdf format. Broken links removed or changed..

Digital Circuits - These circuits are based on CD40xx Chips and other. You can use 74HCT or any other series that is available. use one family for a particular project. These were used nearly two decades ago. Use it for learning, glue logic or to interface your uC designs to external devices.



Do not make only Logic based designs like some below. It would be better to use a uC, CPLD or FPGA if you are building a complex gadget Basic Digital Circuits

1. Basic Digital Circuits
2. Digital Timers, Counters and Clocks
3. Mixed and Interface Circuits
4. 555 Timer based Circuits

More such designs as entire products

• Two Stage Sequential Timer
• Build a DMM or digital multi meter
• Mixed Circuits Analog with Digital

Here are power supply, inverter, drives, chargers and high current equipment diagrams and links. There are Mosfet and Thyristor circuits too.

Power Electronics Section

Power Supplies, Inverters, UPS, Chargers, Electro Plating, Precision Welding-erosion, Coating Metals and many other Processes are made of high current circuits. Even in measurement of parameters like Micro-Ohm high currents are involved. Electronic Circuits are required in such products to give control to time, current, frequency and voltage in order to accomplish with the required precision a process or job.

In any power equipment, efficiency and reduction of bulk is crucial so SMPS and high frequency control is an important part of this domain. These products also generate EMI-RFI. Product Safety Study is also vital.

Power Electronic Circuits.

Basic Power Supply Designs - AC and DC voltage Regulators, Battery Backup Power Supplies. Battery Chargers, UPS and Inverters. Dual regulated Power Supplies. 5V and 12V Regulators. Benchtop Power Supplies.

Power Supplies Section.

Switching Supplies and SMPS - Circuits of SMPS, Power Supply, Switch Mode Power Supply are here. High Voltage Power Supply concept. DC Regulated 3 Pin Power Supplies like 7812 and 7805. Workbench Supplies.

• Regulated High Voltage Power Supply
• Switching Battery Charger with L296
• 100kHz Half Bridge Convertor SG3525
• Simple WorkBench Dual Power Supply

Solid State Relays - SSR.

Here are many Types of SSR or Solid State Relays. In this section you will find SSR designs and PCB layouts which you can study. These were made and sold by me years ago. So the PCB layouts have gone thru some revisions and they worked quite well.

High Energy Circuits

High Energy Power Circuits, Thyristor controls like AC and DC Drives, HV power Design, UPS and Mains Power Inverter. SCR control and Battery Chargers.