Portable Power Supply

Well it has been quite a while since I posted anything on this subject. What with the house move and building a new home, I haven’t had a lot of time, and finding things is rather difficult. Testing the first prototype showed a couple of straight out errors. However the processor interface to the output […]

Benchtop Multimeter

A while back a cheapie digital multimeter I have started to become intermittent so I thought I might get a decent bench top multimeter. I looked around and decided on an HP, no Agilent, no Keysight as they are now called model 34450A 5½ digit one. I have used it since then doing the normal […]

Portable Power Supply Initial Tests

In my previous post, I gave you my thoughts on my desire for a portable power supply. Since then I have drawn up the circuit with Altium, and laid out the board.  My normal procedure from there is to leave the project alone for several weeks so that I have forgotten the fine detail. You […]

Portable Power Supply

For some time now I have been looking to build a new power supply that was small, low cost portable and capable of operation away from mains power. The desired capabilities are;- Output Voltage 1.0 Volts to 25.0 Volts Maximum current 1.0 Amps Adjustment accuracy 0.1 Volts Current limit adjustable 1.0 mA to 1.0 Amp […]