Karel Walraven (34)

| In the 1950s there were lots of DIY electronics designs for sale. They were printed on large sheets of paper (easily up to a metre in width)...

| Most of our readers will appreciate that miniaturisation has brought many benefits. It is certainly the case that those small, modern mobile...

| A solution using two diodes followed by a 4 times voltage multiplier in the form of a cascode rectifier.

| Assuming no AM radio is available anymore, a dedicated VLF receiver tuned to about 300 kHz can faithfully detect the crackle of approaching...

| Most digital multimeters have a sensitivity of 200 mV and in input impedance of 10 MOhm. With this information you can calculate that at ful...

| Rarely have we received so many (enthusiastic) reactions from readers as those that were prompted by the publication of the OBD-2 analyser....

| Recharging batteries for devices such as digital cameras can be a problem when you’re on holiday in a remote or inhospitable region. You won...

| Newcomers to this magazine quite often send us emails with lots of questions about the component choice for projects described in the magazi...

| The miniaturisation of components does cause the odd bit of trouble at Elektor Electronics as well. While developing last June’s Electrosmog...

| Prices in the supermarket are rounded to whole cents, but the price of cars is usually rounded to hundreds of euros. There is apparently a r...