Electronic Circuit Diagrams
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Analog, Digital, Electrical and Power Electronic Designs. Here you will find some of the product and circuit designs of delabs. Some are Educational, Generic and few others are related to Application Notes. Many are Intellectual Property of delabs contributed to EE Education.
- Dual Supply +5 and -5 using 555
- Linearizing Circuit with Opamps
- Generic LM317 Switching Supply
- Fluid or Water Level Indicator
- 80C39 and MCS48 based Process Controller
- Telephone status indicator with LED
- Button and four LED Lights
- +5 to -5 using a 555 Astable Multivibrator
In this circuit the 12 DC, two wire is converted to three wire +5 and 0 and -5 dual supply useful for op-amps or other interface circuits.
The thermocouples and some other sensors have an output that is non-linear. That means the mV generated by them are not in direct proportion to the parameter measured.
This was a common way LM317 was used to get a stable power for small devices. It is still useful for learning and some blocks of the circuit are still used today in modern industrial systems.
The Reed Relay based Float Switches are used in Automobiles and even corrosive and volatile fluids. This can also be used to indicate level of water or operate pumps.
The Early Microcontroller : 80C39 is a CMOS Version of 8048 the one that preceded 8031-8051. MCS48 is the set for that, MCS51 is the current set.
This will monitor telephone status without loading the telephone line, this way if you have two phones in parallel you will know if one of them is busy.
Need a design – Simple one button push button to turn on 4 different LED (3mm Dome) every time you press the button.
This is a very simple -5V supply using one 555, useful for analog blocks using FET Opamps using low power.