J. Ruffell (55)

| With the availability of portable CD players, a need has arisen for a means of connecting such a machine to the radio-cassette player now...

| This circuit enables the automatie on/off switching of mains-powered equipment after a master unit has been switched on or off. One parti...

| There are many programs that take of lot of precious time, even on relatively fast PC-AT computers. Examples include electronic circuit...

| This circuit complements the mini EPROM programmer featured a few months ago (Ref. 1). The simple-to-build unit allows data loaded into mo...

| Although it is almost impossible to imagine present-day meteorology without electronic equipment, sunshine is still widely measured with t...

| Electronic temperature monitoring need not be complex. This circuit gives an audible indication when apreset temperature ls reached. It ca...

| To the many PC users who would like to interface their computers with the real world we present an analogue-to-digital and digital-to-anal...

| Owners of inexpensive, yet reliable, CD players, such as the Philips CD371 or Aristona CD1372, are often frustrated by the limited program...

| Digital probes come in many shapes and versions. All of these, however, suffer from a single disadvantage: they can monitor the logic leve...

| Most of us are aware that computers and other digital systems can go haywire just like that. If neither the hardware nor the software can...