robvh (29)

Von robvh

| Ein Quiz ist eine tolle Beschäftigung für lange Winterabende, verregnete Sonntagnachmittage und während des Lockdowns. Mit dem Spaß ist es j...

Von robvh

| Find your way out of an electronic labyrinth

Von robvh

| Dieses Musikinstrument wurde vor einigen Jahren für meine Kinder gebaut. Es ist sehr einfach und verwendet nur Standardbauteile. Und - sehr...

Von robvh

| Hands on the buttons, who was 1989 worldchampion .... The player who presses first may answer; when the buzzer sounds, the answering time is...

Von robvh

| This simple electronic instrument contains a small number of standard parts and needs no on/off switch.

Von robvh

| For the control of the lighting around my home (and inside if I'm on hollyday) I used to rely on 4 mechanical timers. A replacement was need...

Von robvh

| Save time if you build a prototype with microcontroller and LCD. Because at least a part of such a circuit is the same you can often use the...

Von robvh

| Simple digital timer as NE555 killer in many application were accurate timing is required from seconds until hours.

Von robvh

| By using so called ladder diagrams one can build a PLC-program like a schematic diagram using relais like in the early days of automation.