Category: Magazines

40 Pages. Keyboard for ZX81 Spectrum. Frequency Meter Adaptor. TTL/RS232 Converter. TDA7000 Radio. 5 Bob’s Worth. Personal Stereo DNL. Logic Pulser. Hi-Res Graphics for …

32 Pages. VIC-2- RS232 Interface. Enlarger Timer/Controller. Sweep Oscillator. ZX81 Modem Interface. CMOS Crystal Calibrator. DXers Audio Processor. Using the Commodore 64.

36 Pages. Telephone Exchange. Frequency Counter. Car Burglar Alarm. Remote Control for Amplifiers. Ultrasonic Intruder Detector. I/O Port.

30 Pages. Doppler Intruder Detector. Doppler Control and Interface Unit. 25W MOSFET Amplifier. Train Remote Controller. ZX81 Keyboard>

81 Pages.

82 Pages.

82 Pages.

100 Pages.

68 Pages.

81 Pages.