Battery powered christmas tree lights – blue leds fade first
The blue LEDs on my cheap battery powered Christmas tree light go out long before the other colours. Why? I'm…
Soldering surface mount devices to a single sided pcb
My PWM5 Solar Charge Controller (www.256.co.uk) uses 3 surface mount devices (a capacitor and 2 resistors) on the PCB. Attaching…
1.4ah power tool battery v 1.9ah aa cell – do the maths!
The little AA cell has a higher Amp-hour rating than the big lithium power tool battery - what's that all…
1aa led torch roundup – lenser fenix flashlight
A quick roundup of single AA LED torches. Featuring Fenix and LED Lenser models. All these flashlights have the necessary…
3rd generation sanyo eneloop aa battery specification and discharge test
Brand new 3rd generation Sanyo eneloop AA batteries with improved specification. 1800 recharge cycles, 70% capacity retained for 5 years,…
Fixing a solar panel to a fence using double slot shelving
The sun is so low in the sky now that the lawn is in shade most of the day. I…
How to extend the life of aa alkaline batteries
When a high current device like a digital camera or media player reports that the batteries are dead, don't throw…
Preparing solar panels for the low winter sun
With the sun so low in the sky, my hedge tops are casting shadows on my solar panels. If I…
No longer the world’s shortest microchip pic flashing led program
This 5 instruction PIC assembly language program flashes the LEDs on the Low Pin Count Demo Board in an incrementing…
16f690 on low pin count pcb with pickit2
Chose the PICkit2 programmer to develop some new code because it comes with the Low Pin Count Demo board and…