This circuit, which can serve as a reference for restorations, was found in the October 1989 issue of Radio Electronics magazine. The circuit uses a 5-digit display and a dedicated integrated circuit.
Figure 1 shows how the 4029 can be connected to count up to 10 and also up to 18. If pin 9 is...
This circuit was found in the February 1992 issue of Radio Electronics magazine. The circuit...
This low current solenoid driver was found in an ancient American documentation. The solenoid must be...