12 Volts dc supply with 45000 uF 35 Volts buffer capacitor to ensure a reliable operation of the Gents GPO master clock.<br /><br />My GPO Hipp Toggle pulses every 14 to 17 swings of the pendulum ( 28 to 34 seconds )<br /><br />Often small 6, 12 or 18 Volt plug packs are used and have not got the capacity to furnish a 250 mA slave clock pulse or the rapid Hipp Toggle pulse to keep the pendulum in motion.<br />A big capacitor will assist in the current draw taken by the clock and minimise voltage drop.<br /><br />I charge a 12V 100Ah accu in my basement for back up in case of a power cut.<br /><br />It will also reduce wear and tear in Hipp Toggle contacts making unnecessary extra pulses to swing a heavy pendulum every 5 or 6 swings.
