The Authoritative Website for Timex/Sinclair Computers
The Authoritative Website for Timex/Sinclair Computers
Power Supplies and Related Hardware
One of the most immediately obvious ways Sinclair cut costs was in its power supply and regulation circuitry, especially in the ZX81 and TS 1000.
The most trivial of components, a power switch, was omitted from every Sinclair, from the ZX80 to the ZX Spectrum. Users could unplug the power from the computer, from the outlet or use a power strip to switch the power on or off. Inserting a power switch between the power supply and computer was a quick and easy solution.
A bit more challenging was the power supply and voltage regulator. The power supply provided just enough amperage to run the computer and a 16K RAM pack. Anything beyond that required a replacement supply.
The ZX80, ZX81 and TS 1000 computers all suffered from overheating, due in part to the overall design and an undersized heat sink. Replacement power supplies and larger heat sinks were common solutions.
On the positive side, the power requirements of the Sinclair computers were minimal enough that an uninterrupted power supply could be easily made using just a few batteries.
Heavy duty replacement for the standard Sinclair/Timex supply. Supplies up to two amps to run external memory, printer, I/O modules, and other add-ons. Eliminates black bars and other problems caused by an insufficient power supply. Includes LED power indicator.
Pre-regulator conditions the incoming DC voltage from the ZX/TS power pack into the minimum required to operate the computer. Also included is a system reset switch.
Power switch, ON indicator, load/save isolation switch with load level monitor and reset control. Isolation switch prevents feedback during program save. Reset allows recovery from crashes without powering down peripherals.
Protects against pulsed, continuous and/or intermittent radio frequency interference which can cause malfunctions in electronic equipment. Also protects against high voltage transients and surges such as those produced by lightning, switching surges, and noise spikes. Includes power switch, pilot light, 5 amp fuse and two protected outlets.
Plug-in unit, twice the size of its 9V rechargeable battery. Provides power/RESET switch, up to 15 minutes of battery back-up, and a power LED (green for line, red for battery).
Design and build your own supply to fit your needs. Includes how to estimate both present and future needs and covers both single and multiple-voltage.
Two filtered outputs. Output 1: 5 volts at 1.5 amps; output 2: adjustable from 6.5 to 15 volts at 1.5 amps. Incorporates push button to clear the computer, an LED power indicator and connecting plug and cable. Overcomes problem of heat in the original power pack.
Battery-powered backup system. Power supply plugs into module, computer is powered from module. Activated by drop in voltage from power supply. On/off/reset switch. Uses two standard 9 volt batteries. UPS-1M includes program loading monitor to solve tape loading problems.
Battery-powered backup system. Power supply plugs into module, computer is powered from module. Activated by drop in voltage from power supply. On/off/reset switch. Use rechargable Ni-Cd batteries. UPS-2M includes program loading monitor to solve tape loading problems.
Heavy duty power supply designed for the ZX81 or TS1000. Fully regulated, rated at 1.5 to 2 amps. Made to supply enough power for the ZX81 or TS1000 and any add-on.
