NiCd temperature monitor

The monitor is particularly intended as an aid for fast charging of NiCd batteries. Most commercially available fast chargers have no temperature sensor, although the temperature is an important factor in the fast charging of NiCd batteries. According to manufacturers’ data sheets, temperatures for various states of a NiCd battery should roughly be: (a) 30[…]

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Relay fuse

Relay fuse: Simple battery chargers and power supplies are not normally provided with a current limiter. In many cases, however, it would be advantageous if the unit were proof against short-circuits. An electro-mechanical fuse which serves that function and which can be added to the unit is shown in the diagram. There are two variations,[…]

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Video enhancement for Acorn Archimedes

The Acorn Archimedes, well-known L’ for its speed and good graphics facilities, has a video interface that allows programmers to design a variety of screen modes with the aid of a programmable controller. As so often, this versatility has a drawback: since the controller uses a fixed clock at 24 MHz, the frame frequency decreases[…]

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Angled bus extension for PCs

Angled bus extension for PCs: This 8-bit bus extension card for IBM PCs and compatibles allows you to connect and test insertion cards without having to open the computer. The printed-circuit board shown here is angled and has a 62-way slot connector to accept external boards. The pins of the bus connector are soldered straight[…]

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simple-electronics

Latest mini projects in electronics with circuit diagram

1. Circuit Diagram Of High Power Audio Amplifier In this tutorial “Circuit Diagram Of High Power Audio Amplifier” you will how to make an audio amplifier which you can utilize with any of your musical instruments like piano, gitar and with ipod and other devices? So, Lets begin the journey…. READ MORE     2.[…]

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PC fan control Circuit

PC fan control Circuit

It is an unfortunate and well-known fact that most PCs of IBM and compatible type make a lot of noise. which is both undesirable lots of noise in the both undesirable (as regards noise in the working environment) and unnecessary (as regards the actual power consumptions. which is often quite low ), many fans in[…]

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Best-Electronics

Electronic Reversing Circuit for Model Rains

Many model train enthusiastic UV find the mechanical reversing system for trains in the HO series from Marklin and other manufacturers primitive and unreliable. The system is based on a.c. motors and a mechanical reversing assembly operated by a small electromagnet. The motor speed is determined by the track voltage, which can lie between 4[…]

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Burr-Brown

REF200 from Burr-Brown

Burr-Brown’s REF200 provides in independent 8-pin DIL package two independent current sources, either of which can supply 100 NA and a 1:1 current. mirror. The pinout of the device is shown in Fig. 1. Note that there are no pins for connecting a supply voltage. The correct operation of the current. sources are, however, guaranteed[…]

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