Set/Reset Flip Flop

Set/Reset Flip Flop Circuit Description This is an example of a set/reset flip flop using discrete components. When power is applied, only one of the transistors will conduct causing the other to remain off. The conducting transistor can be turned Continue reading

Digital Step-Km Counter

Digital Step-Km Counter Max. range: 9.950 meters with two digits Slip it in pants’ pocket for walking and jogging Circuit diagram Parts: R1,R3 22K 1/4W Resistor R2 2M2 1/4W Resistor R4 1M 1/4W Resistor R5,R7,R8 4K7 1/4W Resistor R6 47R Continue reading

Generating Long Time Delays

Generating Long Time Delays Circuit Description Generating long delays of several hours can be accomplished by using a low frequency oscillator and a binary counter as shown below. A single Schmitt Trigger inverter stage (1/6 of 74HC14) is used as Continue reading